6L80E Transmission Assembly

In this video I will be covering the assemblies of my builds of the stock 6L80-6L90 transmissions. I will not be covering clutch clearance checking and modifications along with endplay measurements and adjustments, nor vacuum testing. I will post all of that information in another video.
This video is dedicated to Jeremy Sanner, recently diagnosed with terminal cancer and is a fellow mechanic. Here is a link to his video: www.tiktok.com...
Part numbers used in the video:
Sonnax 1234 Billet Piston : 104984-01
Sonnax Bushing Kit: 104030A-01K
Sonnax Heavy Duty 456 Piston Kit: 1046960-01K
Sonnax ZipKit : 6L45-6L90-ZIP
Dynamic Billet Converter: DYDGM128-B
Superior Solutions Shim Kit : K0146
Clutch clearance specifications:
1-2-3-4 : 6L80 : 0.060"-.078", 6L90 : 0.070"-0.089"
3-5-R : 6L80 : 0.048"-0.700", 6L90: 0.059"-0.082"
2-6 : Recommended 0.074"-0.079" (No Specification)
4-5-6 : 0.045"-0.075"
Low & Reverse : 0.050" (No Specification)
Total endplay recommendation is 0.012"-0.015"
Check out these links to the supported vendors and manufactures:
www.sonnax.com/
www.wittrans.com/
dynamicpowertr...
www.hptuners.com/
adaptacase.com/
superiortransm...
www.dura-bondb...
transgo.com/

[@brucewest7468]

Your videos are clear & precise. Thanks for calling the rubber seals what they really are. an o-ring is not a lip seal or a d-ring like I’ve heard some other builders say big difference. Thanks for making it clear. “Good content “

[@familyguy5081]

Fan-friggin-tastic video. You are truly an awesome guy for doing this!

[@tylercovell8440]

This is outstanding, I hope this video gets millions of views! Happy Holidays sir! Thank you for this one for sure 👍🏻

[@performancetransmissionsll1573]

Happy holidays!

[@themikeanic1535]

Fantastic video. Well done sir

[@dalethomas9307]

Good stuff! Im diving into my first 6l80 this week for my personal truck. Been through plenty 4l60 variations, 4l80s, th400s, and power glides so I have some confidence but this is like taking an open book test having a video this detailed. Thanks.

[@performancetransmissionsll1573]

Good luck!

[@PaulysAuto]

Amazing video thank you for making it. Truly an art.

[@mitchellhahn5342]

Glad you put this video out! Super helpful!

[@performancetransmissionsll1573]

It's been a long time coming. Without the new Rayban Meta glasses it would not have been easy to film.

[@albertorodeos497]

excellent video why many mechanics need to press the stator on your video just drop like butter

[@wilber.]

Love your videos here & across social media, merry christmas brother & happy new years. :)

[@performancetransmissionsll1573]

Happy holidays!

[@hellboygrim666]

Can you give a description of all the parts you used in the rebuild it would be super useful to go along with the video man! Good work though!

[@performancetransmissionsll1573]

All of the parts and part numbers are in the description.

[@houshang212]

Thanks, Great video, I am dealing with 6L90 and It does not go forward and no reverse, we open it up and 456 clutch are toasted , I have 2 question , do we need to replace new torque convertor, also why there is no movement situation on this type of transmissions? , I could not find any video on youtube regarding to test torque convertor when it is not installed on the car.

[@jtcausa]

Wish you had one of these vids for a 6r80

[@roberttownsend4493]

Holy crap, how big are those snap ring plyers 😅

[@robertrogers3149]

Great video. My 6l80e just did something recently after being rebuilt. When it's in park I can hear noise and when it's in gear it goes away. Then when backing up it kind of goes clunk like it's popping out would you have any idea where I should start looking?

[@GrandPitoVic]

Have you ever seen a 2015 6L90 melt the rear center support piston and ooze melted plastic all over the rearclutcged and lock the trans up?

[@troymartin9001]

I'm rebuilding a 2012 suburban 6l80. When finished do I have to have a fast learn performed?

[@jakegarzo7836]

Not sure if you read the comments often I'm having a wierd issue with my 65rfe, I'm a technician myself, but know very little on automatic transmissions. If you read this and have spare time which i know is hard to come by I'd like to get your opinion on the issue I'm having cannot find anything online, have hours of research into it before I replace what seems to be a good transmission.

[@chrisfletcher]

What platform does most of your content end up on? Would love to see more 6l90 stuff!

[@adam96blackss]

Why does the hole have to be THAT SMALL when drilling the relocation feed? 1/16 bit isnt much bigger than that bit and are easier to obtain.

[@joefair4677]

A 1/32” bit is slightly smaller than Sonnax’s, if I recall correctly, but they can be found in some more readily available “precision bit” or “micro bit” sets. I actually just got one out of a little Dremel micro bit set, for opening up a hole in my separator plate, and then used the Dremel to also drill the zip kit pump hole, with their bit.

[@r.turner6878]

What method do you use to get the pump dowel out of the stator half? What source do you use for the round sanding block used on the pump halves?

[@westonmavis6566]

Is there any way to contact you? I’m having an issue with a 6l80 2015 Silverado. Transmission slipped once pulling my boat up a hill, rpm’s hit limiter before it up shifted. Got it home fluid was black. Chances the filter was metal on the magnet. Shifting perfect now but dealer ship hooked up a scanner and said the torque converter was going out and said I should replace the entire transmission. My question is do you think I need a new transmission or could I get away with just torque converter?

[@robbypatterson5487]

Where did you get the press tool for pistons? We have a hydro press at kut shop. Its a pain to adjust for different housings

[@performancetransmissionsll1573]

Tool number T-0158-SP. I got mine from another builder that had an extra one laying around but you can find them on EBay.

[@lengas01]

Which bushing kit do you prefer? Sonnax or durabond?

[@nitronyles]

I did a very similar build to my 6l80 recently. Shifts good and fluid looks good. I have noticed that in 4th gear, the transmission will get hot. I have manually shifted it into 4th, not towing just driving normal it slowly builds heat. The minute I allow it to shift 5th 6th temperature goes right back down to normal. Have you ran into this before?

[@rolandbaron5813]

Hello 👋🏽 @ performance transmissions. I have a question: I'd like to swap an engine from a 2001 Mustang V6 3.8L that has a 4-speed automatic transmission. And replace it for a 03-04 Cobra engine and pair it with a 5 speed automatic transmission. Is this modification possible?

[@papergatorzfedducca7998]

New subscriber

[@adamfrench8735]

What is the specs on that arbor press if you happen to know ?

[@KipPierce-k1l]

Thanks for doing this for us. Was this just a normal rebuild?

[@performancetransmissionsll1573]

Yes, this is just a normal rebuild. This recipe is used and every one of my stock units and tuning goes along with the vehicle.

[@KipPierce-k1l]

Do you have a parts list and where is the best place to buy parts? Once again thanks for all you do for this platform. @@performancetransmissionsll1573

[@johnniebrady6497]

Which brand drum do you prefer for the 1234 drum when replacing?

[@performancetransmissionsll1573]

I use OEM only.

[@ryanhoward9918]

id rather let you rebuild mine even if i wanted to, your work is immaculate and ive finally had converter failure at 185k.......do i call you guys and get a price on a whole rebuild or??

[@familyguy5081]

Dud you end up rebuilding the whole thing? My converter failed at 160k

[@ryanhoward9918]

@@familyguy5081 yes,new converter,bell housing,new pump and stator,clutches, seals and tuned to to get away from the gm tune....thats what killed it.

[@ryanhoward9918]

2950$ w tune but if it isnt tuned youre gonna have it happen again..why i chose to rebuild mine.

[@hermanjones4124]

Hello I have a question 2014 6L90 transmission does good until it heats up then it doesn’t want to pull in reverse, I have it torn apart but I don’t see anything worn. Can I please get your opinion? Thanks Herman

[@jagboy69]

You need a quiet place away from that orangutan changing tires!

[@TheEpitomeofclass]

Are you R&R and builder or do you have R&R guys?

[@Burgomisterr]

57:57 👍

[@roykeswani547]

Can I bring my truck to you I think it need oil pump on transmission I haven’t found anyone who can find the problem

[@PROJECTRED5]

what driveabiloty issues are you having?

[@roykeswani547]

Sometimes Doesn’t reverse n feel like over heating transmission so I was guessing oil pump but I’m not a mechanic

[@PROJECTRED5]

​@roykeswani547 the converter is more than likely failed and will need to be replaced or rebuilt. same goes for the pump/stator your transmission will need to be rebuilt internallly if the converter has sent metal thru the unit.

[@roykeswani547]

Can I bring my baby to you

[@PROJECTRED5]

im down in houston tx ​@@roykeswani547