6L80E, No Forward Movement

[@gregreitan3634]

Precision transmission & Gary Ferraro videos, I love em!

[@GaryFerraro]

Thanks Greg

[@MD-cd7em]

GARY ...YOU HELPED ME FIX MINE ALMOST A YEAR AGO....MINE WAS THE ONE ...I HAD CRACKED DRUM..SHREDDED TORQUE CONVERTER THAT KILLED MY PUMP...REMEMBER?... I TOOK YOUR ADVICE BOUGHT THE SONIC PARTS...IT RUNS GREAT MAN...THANKS AGAIN!

[@GaryFerraro]

I Honestly don't sorry, but I'm glad you got it fixed and your back on the road, Happy Holidays

[@CubasAutomotive]

Great tip on the snap ring! I don't think I noticed it out right off hand but I go around checking to make sure it's all the way seated. Working on 1 soon. Thanks Gary! Your videos are incredibly valuable! 🤗🤗

[@GaryFerraro]

On both sets of clutch packs in that drum. If any questions let me know, happy to help. Always nice to hear from you, Happy Holidays to you and family

[@oldschool9746]

Thank you so much, Gary for all your time and effort you put forth to make these videos for us. wishing you and your family and your business a merry Christmas and a happy and prosperous new year.

[@GaryFerraro]

Thanks , Happy Holidays to you too

[@mikepittsburg6939]

@@GaryFerraro it's very difficult to learn about automatic transmission.Well at least for a layman like me.kkk

[@igotaction]

Gary is the best with transmissions!

[@GaryFerraro]

Thanks Joel

[@billk5727]

Thanks for the tips Gary. Glad to see that you finished out a pretty good year! Bill

[@mercurymarauder2897]

Hey Gary thanks 👍 for another great video, want to wish you and Mom and your staff a merry merry Christmas,

[@GaryFerraro]

Thank you, same to you, stay safe

[@n6mz]

Merry Christmas, transmission maestro.

[@GaryFerraro]

Thank you my friend

[@josephfigueira813]

Thumbs up to you Garry, thank you 👍👍👍👍👏👏

[@GaryFerraro]

Nice, Thanks for watching

[@calholli]

That's pretty sad to see a solid piece failing like that. I can understand clutches getting worn or bearings failing--- but for a solid piece to crack like that, it should be unacceptable. There's no excuse for it. I almost feel like the replacement should be steel, if its that bad. This is why I only buy manual trans. lol

[@ToDaMn]

Hey Gary, just watched this video as I sit in my 14 Silverado waiting for a tow… No forward gears but has reverse. Do you have a link to the service information or flow chart.

[@GaryFerraro]

Pretty much, you would have to drop out the valvebody first and check the #1 checkball, if ok, then the 1-2-3-4 piston is cracked, trans would have to come out

[@michaeljohnson91501]

I'm missing my 6l80 check ball number 4.. is it necessary to have?

[@jeromeburrasca6710]

Great videos!! So, who makes the best bulletproof heavy duty transmissions for these vehicles? I own a 2011 4x4 Suburban and I’m keeping it forever? I keep my paid off vehicles and build them back better and stronger than factory. So who makes the best replacement transmissions??

[@goetzsievert6619]

2010 Escalade 6L80 , sometimes loses forwardgears after coming to a complete stop . Park it , restart and works perfect . Hot cold no difference . Drove it 2 days with no problems . This morning no forward .

[@GaryFerraro]

The #1 check ball shrunk down allowing the drive oil to leak. Checkball located in valvebody

[@goetzsievert6619]

@@GaryFerraro , checkball was ok ( put new ones in when I built it ) had P0603 and other communication codes ( ECM/PCM ,, Body controller/TCM . So I got me the TCM/solenoid assembly. Watched your Video again and then it hit me . I changed the Pumpassambly when I built it , put the 4 Stator seals on without taking the expansion rings off the old stator . So sometimes it worked just great , but if I came to a stop at idle it lost forward gears , at times . But when I stopt with a little throttle applied and kept idle up it never lost gears . I correct it tomorrow and let you know . Thank You for the great Videos , I'm doing transmissions since 1976 , Watchrd just recently You tube on trans , 99% are not useful you the first one makes professional sense . Thank You .

[@GaryFerraro]

@@goetzsievert6619 Thanks for the update

[@goetzsievert6619]

@@GaryFerraro ok , I put o-rings and the 3 teflon sealingrings on stator , checked for cracked piston and drum ( 3rd time ) , changed TCM ( verified checkballs ) , reprogrammed at dealership . Drove it 50 miles , no 603 nore 0741 code no more , but every now and then after coming to a stop neutralizes in forward , reverse ok . I pulled it out 2 times after rebuild , pan is clean , airchecks like in your video .Works without delayed engagements , no flairs or bumpy shifts , kick downs , all like in a new vehicle , but every now and then no forward after coming to a stop .

[@GaryFerraro]

@@goetzsievert6619 Have you put a pressure gauge on this?

[@jasonperkins1002]

What would cause no forward movement in a 4l80e. 1994 GMC 3500 crew cab dually 6.5l diesel

[@GaryFerraro]

If reverse is ok then forward clutch pack may be burned out

[@jodypearman8526]

Hey Gary, I have a 6L80 that I rebuilt 40k miles ago due to the torque converter sending metal shavings everywhere. I couldn’t replace the pump housing, they were on nation wide back order. It works great except for when it gets above 200, if I put it in park and then shift to drive it will act like it’s in neutral until I give it a little gas, then it will lunge and it pulls fine. Is this due to the pump scaring? It will not do this all the time, it’s random. Another symptom is when you stop fast it will lunges after it stops. What do you think?

[@johnbutcher3451]

2018 GMC 2500 6L90E 57,000 miles did this, With TCM fuse pulled Truck will drive in 3. Clean fluid no debris in pan. after a fluid and filter change, Transmission shifted perfect for about 3 miles, slowing to about 5 mph, felt like trans was bumped into neutral . Sticking Check Ball?

[@GaryFerraro]

How is reverse?

[@nathm4435]

Hi there gary, my 6l80 forward gears goes on and off constantly, and then no forward. Could this also the check ball? Goes for a second then nothing. Reverse is fine. What could cause this?

[@GaryFerraro]

sounds like a check ball problem

[@MrM113A1]

Great video once again. If the number 1 check ball were to be shrunk down but stuck in the separator plate could this cause a No Drive issue also? It was stuck on the upper valve body side and blocking off the port to the drive brake not allowing it to float and move between the two bathtub ports. Ive actually got one here at the moment with this issue, however i also found that 2 of the solenoid pressure discs to be split and it had 3 codes. P0756, P2714, P2723. Kind regards mark

[@GaryFerraro]

I would say yes

[@scotthodges1236]

hello gary...i have a 2000 chevy 2500hd 4x4...4l80e trans....transmission is great except for a slight 1 to 2 second delay into reverse when warm...no slipping at all....I have read this is normal for this year trans....I have also been reading about the servo pin wearing and a fix kit made by sonnax....your thoughts appreciated...thanks

[@GaryFerraro]

Is this after a rebuild? 2-3 shift is ok hot?

[@scotthodges1236]

@@GaryFerraro no rebuild....2-3 shift is good hot....reverse has maybe 1 second delay to engage then goes

[@harvrindrsingh]

Hi . Greetings from dubai. I have a bmw 4 8i 2008. The company says no need of transmission oil change , its a life time. Its a zf6 hp 26. Should I change the transmission oil. Will it effect the shifting.

[@GaryFerraro]

Yes, Bmw says that ZF does not, i recommend every 30K miles

[@videotearoff4933]

Hi Gary .. I have a few questions about a BMW 2008 528i manual so if you have the time could you please message me back

[@goetzsievert6619]

The root cause of the 1234 drum / piston cracking I couldn't find out yet . I'm shure it happens when the vehicle comes to a stop , leaving the shifter in drive , neutralizes at take off , that's when drivers step on the throttle , eventually the trans catches with high RPM and then the cracks happen . I worked in the early 90's in ford / L / M dealership and we had the same problem with the AX4S . I found the root cause at the 2nd rebuild : the little ( mushroom look like ) plunchet sealing off against seperatorplate , was hanging up . So people went on the throttle till the plunger came free - tires barking , front trans mount broken , N to D accumulator spring broge , and forward piston cracked . So I started putting the light spring back in the valvebody and replaced the plunger with a check ball . FORD updated the alu.piston with a steei version but still had the same neutral after stop condition . They replaced the mushroom plunger 9 years later w oil th the AX4N . I talked to FORD engineers at FORD school in Marietta, GA but got blown off in 1992 , talked to Lavonua Transmissionplant in Michigan ( about the AODE TC shudder too ) but got blown off . I'm working on that 6L80 neutral symptom now , I got that Escalade since 7 weeks , loosing my a.. , but I will figure out the root problem .

[@GaryFerraro]

Did you find a cracked piston or bad check ball?

[@ToDaMn]

Same symptoms on my 6l80.. What do you do you recommend on the rebuild aside from the piston or drum replacement? or should I just go with a monster or jasper reman? leaning towards the piston drum because when cold it will a drive, somewhat. Once it heats up I believe the crack expands fluid thins and then it will not move at all. Reverse is strong regardless also no codes...

[@GaryFerraro]

Wel, could go either way, may want to drop the valvebody first, do not have to pull the trans to do this

[@brianp4199]

Is the 6T40 a troublesome transmission?

[@GaryFerraro]

Generation one had problems with loosing 3rd/5th and rev. What year is yours?

[@brianp4199]

@@GaryFerraro Mine is 2018 Chevy Sonic.

[@GaryFerraro]

@@brianp4199 You got a Generation 3 trans, haven't had any yet, that generation came out in 2015, i believe they are pretty good

[@brianp4199]

@@GaryFerraro thanks for the info Gary

[@Steve.191]

Thanks 👍

[@GaryFerraro]

Thanks for watching

[@rubiocra]

thank you gary

[@GaryFerraro]

Thanks for watching

[@reinaldinhocambiosresende6551]

Boa tarde Gary e so pra desejar um feliz Natal e excelente ano novo

[@GaryFerraro]

Thank you

[@esssamco]

GM should recall their cars for this disasteres engineering.

[@alexvargasmorales712]

Yup:/ POS TRUCKS this is my 3rd time the transmission breaks in my 2014 silverado. All I did was step on the throttle and it couldn’t even handle that.

[@руслангаджиев-х8л]

Можно английский выучить

[@GaryFerraro]

Thanks for watching