Z-PAK by Raybestos 4L60E 700R4 3-4 High Performance Friction Plates

*Z-PAK by Raybestos 4L60E 700R4 3-4 High Performance Friction Plates | Automatic Transmission*
This video provides a step-by-step guide on installing Raybestos Z-PAK high-performance friction plates in a 4L60E transmission. The Z-PAK is a popular upgrade for these transmissions, as it increases the load capacity and helps prevent clutch burn.
*The video covers the following topics:*
Overview of the Raybestos Z-PAK and its benefits.
Comparison of Z-PAK friction plates with stock friction plates.
Step-by-step installation instructions, including lubrication and component placement.
Explanation of the specific components used in the build, including the boost valve, shift kit, and wide band.
Discussion of the importance of using a 98-and-up drum for this setup.
Demonstration of the completed transmission build and its operation.
Real-world example of a high-performance 4L60E build in a Silverado truck, highlighting its capabilities and performance improvements.
*This video is ideal for anyone who wants to:*
Learn how to install Raybestos Z-PAK friction plates in their 4L60E transmission.
Improve the performance and durability of their 4L60E transmission.
Gain a better understanding of the components and operation of a 4L60E transmission.
*Keywords:*
4L60E
700R4
Transmission
Raybestos
Z-PAK
Friction Plates
High Performance
Rebuild
Install
Automatic Transmission
Silverado
Truck
Towing
Heavy Duty
Shift Kit
Boost Valve
Wide Band
This is an installation video of the Z-Pak from Raybestos on a 4L60E transmission. I use this regularly on all my Heavy Duty and Performance Transmission builds. A regular stack up is ideal for regular commuting, but if you tow and abuse your vehicle, in a fun way, then you'll need to upgrade to this set up.
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Thanks for watching.

[@DavidSmith-mk7qo]

Glad to see you use the return springs. I get mine for free out of the trash where most builders throw them.

[@jbstepchild]

I have one of these 4l60e trans an I've had it rebuilt an nonthin but problems for what I have spend on the rebuild I bet I could have flown to u with the teams an back an I'm not sayin cheaper I'm sayin I would have been much happier with your build sir absolute amazing

[@willmc42]

Very professional knowledgeable install. i watched a GM MasterTech instructor perform this very build on my '00 Chevy 2500 Express trans a few years back, now i'm getting ready to do it on my son's 2003 S10 4wd...wish me luck. Thanks for the video , it is a big help on doing this the right way.

[@prancstaman]

You put the pistons in while yackin away, lol. I been trying to figure out how to do that part all day, lol. Till I seen this. Thanks for sharing, you been a big help.

[@james102377]

You are the first person that's been more helpful than all thr rest. As far as I know my transmission has never been rebuilt yet it has this z-pack in it. The factory manual says it's model dependent and would have 5, 6, or 7 frictions. The ATSG manual was useless and the other transmission shops I've contacted were useless. You on the other hand know about the 7 plates and have the mileage almost down to a T. My hummer H2 lost 3-4 at 85000. There's too much free play with the 6 plates and mine has 7 and looks exactly like the z-pack when I removed them. I've run out of money at this point so I'm going to have to clean up the steels and reuse them but I did order 7 .065 plates.

[@danielkapp9468]

This is kinda funny. I was actually looking into purchasing an H2 that had it's 3rd/4th go out and have been browsing videos to see how hard it'd be to rebuild. I definitely prefer seeing how Hiram did the job compared to some other videos (saw one where the guys were beating on one with screwdrivers). I understand transmissions are durable, but they are also components that require tight tolerances that shouldn't be abused.

[@james102377]

@@danielkapp9468 My rebuild worked out great so far. I put a few hundred miles on it before I stomped on it on the highway. I upgraded a few parts like the sunshell while I was in there. I didn't mess with the pump though, ordered a rebuilt one on ebay from Chicago transmission that had an upgraded boost valve. I had a couple clips I had to replace because I didn't have the right tools but now I do. Also had to replace what looks like a washer but it's a thrust bearing or something. It was chewed up and one side in pieces. I think the worst part was resizing the solid teflon rings and not chopping them when putting it back together. I bought a tub of Transgel and I lubed EVERYTHING except the clutch plates and steels.....lol

[@james102377]

@@danielkapp9468 Now that I have all the tools to rebuild it, I would do it again if I had to.

[@oby-1607]

This is what I so need. I have a GMC Safari that pulls a 2000 pound single axle trailer and it goes over a curvy mountain pass to deliver in the city. So there is a lot of hills and corners to accelerate out of. I need heavy duty. This is the weak link in the van, otherwise, I totally love the van.

[@RichArd-ee2qj]

Hiram. Another get tutorial vid. Big thx as I know doing the vids adds a lot of time to your work. Greatly appreciated.

[@haywardsautomotive6156]

Nice build so far Hiram. His truck will be a new animal with that converter and it'll help his 60' times and bring the engine to it's power band quicker. I ran a TCI 8" 6000 RPM stall race converter in my altered and thank God for my wheelie bars!

[@monkeywrenchization]

I used to install transgo's commercial clutch pack in 700R4s many years ago. The fictions and steels were made by Alto, they were of thinner design, same concept as Zpack, only Altos frictions had lining on both sides. I still have left over stock plates.

[@Executnr]

9:07 other videos say nothing about lubrication, great video, i would have never known.

[@p1epoppa]

I wish I could work with this guy for two weeks. Transmissions have always made me nervous. I see alot of guys who remove and replace but i have always been curious about the breakdown & rebuild.

[@Nessy..]

Thanks I almost did my install wrong. look forward to seeing your nephews build next, he may crack into the high 13's next.

[@randojo7179]

Thank you very much for posting these videos. Very informative.

[@1badk20]

Great Info. I think the next step up from the Z-Pack, especially for the 3-4 Clutches, is the Sonnax Smart-Tech Input Housing Kit with Billet Input Shaft using either Eight .067" frictions with seven .095" steels, or Nine .062" frictions with eight .077" steels. The Bolt on plate on the Sonnax Drum is very top quality. We all know the downfall of the 4L60E is the 3-4 Clutch Pack Failure.

[@JayDee-bz2ge]

Great vid. Everything explained clearly, awesome !

[@jmurphy1973]

Good to see you back!

[@7REDDRACO7]

thanks soo awesome work ! im converting a 4L60E from a 4X4 blazer for my 2nd gen camaro it has a built higher compression 355 with stage 5 aluminum heads and 4.11 gears. ineed 1st and 2nd gear to be not as low or high in number not higher in number. iloved that planetary for the TH350 for big blocks it had 2.10 and 1.40 gearing it was perfect with my smallblock it knocked out a full second off my ET because the spread is so even, the only downside was 3rd gear with 4.20 wasn't very street.

[@stevencrites1726]

Thanks for your time and info. Very Helpful.

[@campervanelvis9010]

Another great video you are the best in the business my friend

[@GAMINGWITGEEZY]

I plan on using this on my 4l for my 95 formula firebird with my transgo shift kit

[@hotrodswoodshed7405]

Fantastic info ❤️ thnx for explaining it soo well.

[@alial-abduljabbar1767]

Good day, you're so good brother keep up👍 I hope to see Honda Accord 2003-2007 v6 automatic transmission full rebuild

[@johnholloway2445]

YOURE THE BEST, KEEP MAKIN VIDEOS WELL DONE

[@jackmehoff1565]

thanks Hiram you are the man

[@alanchan1772]

hiram thank you for a great video.also step by step procedures.

[@professorredpill3436]

Top notch all the way

[@ozzstars_cars]

enjoyed the video, nice work

[@MeaHeaR]

Thanks Hiram 👍👍

[@castledomeknives9395]

Hiram... You're the best. I have a 1990 Silverado k1500. From 2nd to 3rd..I get a CLANK! .. ANYTHING YOU RECOMMEND BEFORE I REBUILD...( ON a budget ..sucks) PLEASE!!!!!!!

[@Junebug60]

Hello Hiram I see this video is old but have a question. I am building a 4L60e for my son. The kit we have has the z pak cluthes. Raybestoes says clearance should be .050-.070. Without the extra "shim" I have .080 clearance. With the extra s him I have .038 clearance. We have decided to go with the .038 clearance. In your opinion will it live with .038 clearance?

[@drigo4dawin329]

great work. you the best of best!!!!!

[@63256325N]

Thanks for the great vid.

[@ricardoandrade9172]

Hey Hiram I'm a one man garage shop owner I took a plunge and started working on transmissions thanks your videos. So thank you very much. I was wondering if you've worked on any of the latest diesel transmissions? Would you please make a video? Alli se cuida, gracias por la inspiracion!

[@30detttt]

Thanks for a great video!

[@TheRealJerseyJoe]

Respect !

[@billybracewell2893]

Awsome vids! I watch and learn. Would like you to do a vid on Uprating and J modding an earlier model Ford 4R70-W / A0D-E. And the difference between building for street/strip and heavy towing/high continuous torque loading. thanks.

[@AutomaticTransmission]

+Billy Bracewell I'm not sure about the J mod. I've seen it but I'm not sure if it would work. Or what its supposed to do. Some things about it doesn't make sense to me. But regarding the performance upgrades on those, I will make some videos for it.

[@billybracewell2893]

In my pre wheelchair past i have done this. It is only a mod for making it shift VERY firmly. WITHOUT the "slip" of softer shifting units. THAT is just for conserving your unit. the uprating and settings for continuous high torque loads is more my concern. (hint) producing a simple tranny that can be easily rebuilt for high horsepower heavy torque apps.

[@billybracewell2893]

AWSOME!! FYI the "jmod" only makes it shift firmer and harder. This saves life expectancy as it reduces or eliminates the "slippage" that accrues for "soft sift" situations. THANKS for replying bro.! I will be watching. I have a much modded 94 ford lightning. 1 of the only 780 so built before step side and tonneau covers.yeah, no more E4OD. she now sports a cobra GT500 engine in front of a weakling soon to be rebuilt/upgraded 4R70W/AODE. The 308 rears are and have been a challenge. I have now replaced the nest TWICE. Thinking on going back to the original 4:10. BUT i am getting over 25 MPG with the 308!! WOW!! MAYBE I can go to a 2:73??? Yeah. I'm A TECHIE DREAMER!!

[@johnringeisen3513]

Great video, Very easy to follow along to.I have a question for you .Hope you can help me out.I have 98 Silverado 4x4 with a 4l60e with burnt up 3-4 assembly. I picked up a good 4l60e out of a 2000 4x4.I found out the hard way that torque converter from the 2000 will not go into the crankshaft of the 98.My question is, Is it possible to swap out the drum and input shaft from the 2000 into the 98. Any advice would be appreciated. Thanks in advance.

[@rmejia7554]

Thank you for taking the time to share your experience and knowledge with us!Have you ever used the Alto power pack if so what do you think of it?You are the best Hiram !Gracias

[@AutomaticTransmission]

+RMejia75 they're good frictions.

[@psicopatalucifer]

Nice .! thanks for the info bro.!

[@nitro914]

Great Job! Where is the best place to get all of the parts I will need?

[@AgustinGarcia-ym9gf]

Muchas gracias,por tus videos No tienes idea cuanto me ayudas con ellos

[@garymullins6513]

great video

[@AutoTechToYou]

I've been a tech in the Valley of The Sun, AZ for 15 years but never once rebuilt a transmission. Watching your videos has inspired me to learn more about transmission failures and rebuilds. I was just given a 98 S-10 Blazer that needs a rebuilt engine and fresh trans rebuild by the looks of the fluid. Seems like it was stuck in Second Gear at all speeds. Maybe a solenoid issue but all of that will be replaced. It will be my first Full Transmission Rebuild. What Do you think about rebuilding Nissan CVTs? Thanks for all your videos!

[@longlivechina7538]

My hero epic vid

[@alexrenault3620]

you r the best mate!!! great vids my favourite on the whole of KZbin xx anymore honda vids coming out? (plz say if I have missed some since the rebirth of the channel) thanks

[@tonytheman1993]

Hiram, I have a 2009 4l60e. I recently bought sonnax parts to build a stage 3 transmission. I have the smart tech 3-4 drum. And I read that you can fit more of the thinner frictions and steels in the drum. I was wondering what brand and size I should go with

[@johnmckamy6398]

great information

[@hermanjones4124]

Hello i have enjoyed your video and find it to be very useful tool, i have a couple questions if you don't mind i rebuilt my 4L60E and reverse stopped working and my sunshell is good i replaced it in the rebuild also the 3-4 clutches burnt up again as to that is the cause of original failure. CAN YOU HELP ??? THANKS

[@akjonblaze]

Hey I liked the video a lot very informative. I was wondering if you had a parts list or part numbers available. Thanks in advance.

[@bikerbrego]

I like the videos. I looked at your channel but I did not find an Allison 1000 build.

[@tedzubek1764]

Who makes that lip seal tool (brown handle) that you are using? Is that home made? Thanks!

[@rebuildersinaction5423]

Excelente felicitaciones gracias por compartir

[@Free_1787]

Really like your videos-very informative. What do you recommend I do to upgrade my 95 2wd suburban 4l60E. I've had 2 transmissions installed and I think they keep putting junk back in. I tow a light trailer once in a while but it's starting to slip in 3rd and overdrive. Was looking at the SS monster in a box with the 7 red eagle frictions. YOu think the z pak better?

[@hotrodswoodshed7405]

So to be clear... a 1998 and up model 3/4 drum can be used in a typical older 700r4...in order to get that 7 disc stack package? It's totally possible to put a 1998 drum in a older 700r4 with no other problems?????? (That's a question)

[@rosendo363]

thx hiram. geat videos question what do u think I did wrong 4l60e moves forward no reverse any advice will be appreciated. thx great video, keep it up .

[@westcoast2797]

Wow great video..hey is there a link for this kit you could provide also how about the stage 2 you showed on your nephew's truck I need that stage on my crew cab 4th gear went out and I'm in total need of a rebuilt but want that sonnax level 2 kit but cant seem to find it...thank you

[@doroteoarango7027]

Como puedo hacer el 4t0 cambio mas firme de una 700r4 me podrás ayudar veo todos tus videos saludos desde Mexicali baja califas norte

[@salvadorsacramento5437]

hey, you are the boss !!!!!!

[@juanos9712]

Enjoy your videos man i have a question been trying to figure out why my transmission does a hard shift at first to second gear at 17 mph. Sometimes wen I began to drive the car for the day it does great shifts at 12 or 13 mph but in a couple minutes goes to shifting hard at 17mph. The other gears shift perfect. I had my tranny rebuild I already put 5k miles on it and itdidn't use to do it before I rebuild it. It's a 92 cadillac brougham

[@tbl8560]

Thank you Hiram for sharing your wealth of knowledge. I always heard that using BW Hi Energy 7 frictions and thick steels handles the heat better than Z pack and their thin steel/friction combo. Is there apply and/or exhaust circuit mods that you do to minimize heat? Also, do you ever use the Sonnax Smart-Tech input housing to eliminate apply plate flex? If so, on what type of application? Thank you again!

[@rockroll9513]

Depends on performance/towing. BW and stock input drum works fine for most applications. For HD use go to 9 BW frictions with thinner steels or the z-pak. I wouldn't worry about the input drum unless you are drag racing. Run a proper external trans cooler to keep temps down.

[@tbl8560]

@@rockroll9513 Thank you for the feedback.

[@augustinemitchell53]

Thank you

[@timfranklin1557]

I'm just getting into the rebuilding idea because the 4l60e is going out on my 1996 Blazer 4x4 . I need advice on what to purchase because I'm ordering off of Amazon but the heavy duty / performance rebuild kits are said not to be compatible with my make and model. All they offer is a Alto rebuild kit .

[@lazydog76]

hey man, love the videos. got a couple questions if you dont mind. 03 gmc 1500. 5.3 auto 4l60e. has flare up shifting. 1-2 then 2-3. sometimes takes about 3-4 seconds to take gear and sometimes it is normal. All gears hold strong after shifting with no slipping. Could this be 2-4 servo or accumulator pistons? What's your thoughts.

[@georgiaboy1579]

I love the Z-pak. I would love to hear more about your G35. What year is it and what have you done to it performance wise?

[@waynevalorpi2541]

Hi Hiram , When my 95 Blazer gets hot I lose 3rd and 4th. I’ve seen your Z-PAK videos and others. Could you possibly suggest a rebuild parts list for me? I believe I can do it if someone started me off with the right parts list.

[@qslider303]

Thanks for the video!! Just have a couple of questions. With using a 98 drum on a 700r4, can you still use the 700r4 pump and torque converter? Thanks for your videos again!!

[@adolfouresti7561]

great video!!! one more follower

[@jose38706]

great job! I'm also using that sonnax drum with 9 clutches and 8 plates. works badass. where you do your jobs?

[@Wipsplash]

I am in the middle of my transmission rebuild and was hoping you could answer a question. 1999 Silverado 4.8 with 4l60e. I bought a rebuild kit from Alto and it has a 3-4 power pack which is similar in concept to the Z Pak. The instructions aren't very good for me. My OEM has 6 fiber and 5 steels not including the back or top plates. The power pack has 9 frictions and 8 steels not including the back and top plates. Can I just use the stock back and top plates with the power pack so long as the clearance is the same as the OEM? My OEM stack is 26mm and the Power Pack is 26.4mm. Second thing is my trans didn't have the 5 load springs in it so I ordered some to reinstall. My thought is I can use the thinner 9 disks with the stock back and top plates so long as my clearance is the same as stock specs and adding the missing load springs will help keep the disks apart so they get oil when not applied. Any advice would be appreciated.

[@curtisbrown5766]

Excellent video information on the 4l60e. what about the gaskets on the forward clutch? I have to change mine out. which way they go.

[@BowtieClusters]

Mr. Gutierrez, I would like to get your opinion. I will be having my 4l60e rebuilt it's in a single cab 03 Silverado its at 425ish horse power I daily drive this truck. my trans builder is telling me I don't need the sonnex smart tech drum. I figured it would improve longevity of the trans. I would like to know from you what should I be having installed to ensure my trans lasts.

[@reyperez3424]

Victor Lopez Everything helps, I'm getting a rebuild 4L60e for a blazer ls swap . I was really lucky that I found a 4L65e ( 5 planetary) I bought Raybestos , drum , selenoid $300 so far in parts .

[@pmotorsports8276]

Adds $600 to the build

[@giovannilopez9427]

hey man wondering if you could help me out I have a 2011 Silverado with 4l60e I have first and second gear doesn’t catch 3rd or 4th. What could he the issues I was thinking about replacing the shift solenoids and the torque converter solenoid

[@mannyc285]

Very helpful videos. Definitely knows his stuff. I've seen a few posts asking for shop location. Has anyone figured out where his shop is located, if so please post. Thanks.

[@nickpicarello1230]

Hiram, according to Global Transmission parts, they state that you need a drum from 1988 and a 3-4 clutch apply ring with the #7 ID?

[@joelrugg]

How do you fit the load springs without hitting external clutches when using z pack

[@donaldboyett2571]

Hey Hiram, I'm a certified Automotive technician, and I've watched alot of your videos, and they have helped me alot. I'm a self taught builder. I was wondering if you could do a build on a 6T75? Ive done a few of those recently, and was looking for a video you've made but could only find dissasembly and common problems you've made, and also maybe some tips on testing the Tehcem on this transaxle? Your knowledge is priceless,and I'm sure I'm not the only Tech you have helped tremendously! Thanks for your time making these great videos.

[@luisvelasquez1797]

Nice

[@slurge21]

I have a 2002 Chevy suburban 1500 that I use as a daily driver and also to go to the desert where I carry a heavy load. What set up would you recommend? I am looking to upgrade my transmission as I’m going on 205k miles on the original trans and motor.

[@andresrivasmacias3145]

Noticed sun gear Shell was it.

[@gonzo90302]

New subscriber and viewer. Firts off thank you for the amazing videos. I would appreciate if you messaged me with your shop location so I can can see about getting my vehicle down to you. I would like to have you do a rebuild with the same kit you have in this video. Thank you in advance.

[@DG-od4si]

thanks thanks thanks thanks thanks

[@bobhoffman5581]

Hiram, I have ATSG manuals for the 700-R4--4L60 and 4L60E units, as well as "updates" manuals for both. On page 78 of the 700-R4---4L60 update manual, it refers to the 3-4 clutch apply ring with the stamped #7, which it states was implemented beginning January 5th, 1993. Not trying to admonish a "Master Tech" such as yourself, just trying to pass along information that I myself have acquired--you state that it's a '98 or newer model piece--maybe because you do so many different model years it was a "mixup" on your part? Be advised, PLEASE--I plan on starting to rebuild these units, beginning with my '91 K1500's 700-R4. I bought videos from The Transmission Bench, for the 4L60E, and 4L80E. I'll never be as good at this stuff as you, even if you were doing it in your sleep, but LIKE you, I have high standards. Integrity of the unit will be Priority #1, on EVERY build, PERIOD...

[@LRPM74]

Hiram, great video , question : can i combine this zpack with the Corvette servo 2nd & 4th ??

[@rockroll9513]

Yes

[@jessealdo1696]

Nice job! I lost 3rd n 4th... how much you charge for that same set up?

[@usairman]

When you said the Z Pak will work on a 700R4, you just need a 98 and up drum? You mean 88 and up, correct?

[@JM-yx1lm]

Does the 88 have the 7 marked on it?

[@usairman]

@@JM-yx1lm im using a '96 60E internals in my 700 build

[@bobhoffman5581]

'93 and up, according to my ATSG updates manual for that unit...

[@lowriderpardonme4553]

Hello, and thank you for your videos. I have a 4l60e needs rebuilt and is a junk vehicle so should be a good trainer....I just don;t know where to get the rebuild kit??? I have asked around some auto parts stores and they act like they have no idea. Can you direct me to a source for this please? And Thank You again

[@akjonblaze]

Is wondering about the part numbers you are using for the 3-4 clutch

[@michaelo1492]

Since my 98 Chevy is in “limp mode”, and I already tried changing both solenoids, with the same problem still present, do I just need to buy the 3-4 clutch pack that your showing ? Then remove only those old worn out parts from just the top of the assembly ? My truck is a daily driver to work with no heavy hauling or trailer use... Hope to hear from you soon. Mike in Iowa.

[@Elfnubbin]

I know it sounds silly but did you check the fuse? Saw the same thing before. Guy tried replacing solenoids and it still acted the same. Turned out to be the fuse

[@michaelo1492]

Elfnubbin yes that was the first thing I checked before and after the solenoids were replaced. Fuses and relays all check out.

[@juiceybananas5489]

What is the cost difference or estimate to build a 4L60E bulletproof transmission with clutches etc to last for a long time. I have had 3 tansmissins already and thinking go 4L80E instead.What are your thoughts on this?

[@musiclovr2890]

hi I need some help if you can I have a 1992 gmck 1500 4x4 and was towing a 20ft motorhome and backing it up and heard a slight ping noise and now no reverse, when you first start the truck and put it in revers it wants to go but stops then acts like neutral but doesn't want to roll in reverse hardly at all, it still shifts in 1,2,3 but shifts later 25mph and harder I want to know if this is re buildable b4 getting a kit thanks for your videos and help

[@pmotorsports8276]

Stripped sunshell

[@allenshort400]

what rebuild kit did you use for this build i tow a trailer alot and i need to know what kit will be the best

[@AutomaticTransmission]

There's a lot of options, from Transgo to Superior to Fairbanks to B&M and the list goes on. It depends on how are you going to use your vehicle.

[@AutomaticTransmission]

Assuming you are talking about the recalibration kit the video only mentions the frictions.

[@allenshort400]

@@AutomaticTransmission well I work construction and tow an enclosed trailer so mostly hauling stuff. I looked at TCI rebuild kits but I’d rather hear from someone who has experience in this before

[@taylorh3930]

So z-pack won't work on 93-97modle without changing that drum🤷 Good no either way 🤙

[@billmonroe8826]

Where did you get the extra wide band? Transgo, Sonnax?

[@richfoub]

What's the1998 and up part called that the Z-PAK clutch rings sit in? Can you buy these new or do you have to source used?

[@makeonenine]

Will a 4l60e out of a 2007 Yukon xl 4x4 work in a 2003 Chevy Tahoe z71 4x4?

[@osmanienriquez2545]

Hi friend i have a Van chevy and it use a transmission 4L60e, i got it a code p0757, i checked and the plug was disconnected, solenoid B, the rin seal doesn't seal nothing then i bought two new solenoid. The problen with this transmission is it doesn't shift to 3 and 4 would you like give me more advise or i need buy a new one and this is spensive

[@juanvicentemedina9110]

What is the main cause of the 3-4 clutches burn up with everything brand new?.

[@overbuiltautomotive1299]

thanks man

[@DavidSmith-mk7qo]

I noticed you didnt show the small green seal that goes in the forward drum to seal forward and brake clutch oil.

[@martinez1701a]

What do you think about the Alto Z-pack eliminator? They claim it's better than the raybestos Z-pack I'm think about pulling apart my 4L60e in my 99 trans am cuz I lost my 3-4 again this year after a rebuild.

[@irvingolivissr.3172]

Martinez1701a I want info you on the Alto Z-pack eliminator kit. Listen I was going to do the same thing until did my research after asking the same question. If you search everything that comes in the kit they are the same kit but the only difference is the top pressure plate. But if you don't believe me search part number and specs

[@Executnr]

@@irvingolivissr.3172 are they both better than the the ac delco 3-4 pack?

[@irvingolivissr.3172]

@@Executnr thanks for the info. I'm thinking about the zpak in my 91 Silverado

[@joe35664]

that's what I'm going to be doing on my 2008 Chevy Colorado 2.9L 4L60E trans I bought a level 2 1/2 rebuild kit

[@joe35664]

and doing high performance red alto clutches

[@joe35664]

the rebuild kit cost me $845.00