How to fix No Reverse in GM 4L80-E GM Automatic Transmission Loss of R for FREE 

How did you know what length to make it

@@tysonrobinson9575 the factory maximum length for for the reverse Rod is 4.980. Since my Reverse band was Worn i made mine the maximum length. Worked out good if it's too long you will feel it pulling reverse when on flat ground, then you will have to repeat the entire process. Don't overthink it it's not rocket science. You can however buy a factory for .980 Rod I spent more time thinking about it than it took to do it

​@@clintwolfe8096how long did it be took u to fix it g

What rod do I weld

How has this worked long term? Still using the same transmission?

Thanks for the shout out! Sometimes all you hear is the haters that tell you to do it the correct way... even when you lack the time, money, resources etc lol

That is great man!!! Seriously, this is why i made this video. Sometimes you just gotta get it by for now... kind of get you home type of deal. Glad it helped.

@@WHATTHEFIX bjj7

Thanks bud! We are the people that people make fun of for fixing things... UNTIL they are in a pickle and need someone to get them home... LOL

did it work?

@@HeyFlames yes it did! I've put about 10k miles on it since What I did was weld more material on to the end of the pin then grind it down to match the original shape.

Excuse me did you ever fixed your truck with this patch!?

@@ricardogutierrez1840 No, Turned out to be water from driving in the mud. Did a flush and it started working again. It's working great now and has been going strong for a few months now. I have also had the exact same scenario happen when it was a bit low on fluid!

@@bradlys4978 ok thanks for the info

Thank you for watching! Not always he best cinematography

​@@WHATTHEFIXhow long did it be took u to fix it g

LOL! Mama always say I were the smert one!

Sounds like your R band is wearing thin. Short term fix is this. Long term is to drop the trans and replace. Along with boost valve. (likely just rebuild if that far)

WHAT THE FIX thanx bro! Suppose to dismount the trans and see whats inside

Astro has a different design transmission.

Yes, and no the fluid was fine. I imagine the majority of the band's deterioration was from years of use before the latest fluid change. I was stuck in snow and most likely was over aggressive and caused it to fail suddenly.

Dunno... wish I had better answer

Rear band giving up was the pop maybe. Should be able to see it with the valve body dropped.

Oil level too high?

Nuetral safety switch or linkage needs adj

Did you have a whine at all ? And did you ever figure out your issue and fix ?

It is a temp fix... will get you by for a while until the band gives up and snaps

I am not trans builder. If I had to guess, I would say there is a problem with your bands. Sorry you got troubles. Good luck!

@@WHATTHEFIX thanks mister!

@@garythesquidsquid7779 direct clutch bad

@@WHATTHEFIX Wrong answer, you have no clue what you are doing.

maybe in 1950 LOL

Too new for my old brain LOL So much electronics

I didnt notice. Most likely shop cat lol

That is exactly what i said in the video. And it is 0.20" (twenty thousandths... not two hundred thousandths). Im just a guy that has no training in transmissions trying to help some other fool in a pinch get to tomorrow. Thanks for watching!

.200 is the same I think. Most measure 4.780 and you need 4.980 +/-. .200 = .20.. 20 thousandths is .020

south texas like hell you don’t

You don't, plain and simple

.0200 is a matchbook thickness. You most likely needed to add .200, two hundred thousandths. That would be almost standard for a plow truck band. Good helpful video

I assume so. But I know nothing of the banding inside those

Yes. The 60 is of the same design as far a I know.

Cool awesome im gonna try to do it to the 60 and see wat happens

As I said in the video, someone with more talent and experience than I could perform this with out dropping the VB. Thanks for checking out the vid!

travis schneider like hell you don’t

My 4L80E is 2004. I did not drop the valve body either and I was able to fully service my reverse servo, while laying on my back.

Absolutely! I just live in a rural area, and it would take me at least a day to get a pin in my hands. At that point, I did not have the time. Keep on truckin'

Cool .... I asked at the dealership and there's 4 different sizes tho.... Trying to figure out which one to get before i take it apart.... It's also going to take a day or so for me to get it also.

@@thomascantu3545 Did a new pin fix your issue and did you have a whine at all ? I have reverse coming and going and then none then if i go forward a bit, i get reverse back for a little bit..

Was the R band for me. Trans is out now for total rebuild

In subsequent video on my channel.

Same

Any fix ? I'm losing reverse then it comes back pretty weak but if I drive forward, i get reverse back for a little bit bit then nothing... until I pull forward a ways... Plus I think I'm getting a whine too.. Ideas ?

No Idea. Never worked on one

Ya... some things that come out of my mouth are not what are in my head lol

It lasted a couple weeks.... Until I got stuck and had to severely work the trans. I hit R too early in the attempt at rocking out of a snowdrift and she snapped. I feel the band would have lasted the season. If it was just a regular daily driver type truck I bet it would last indefinitely or until something else in the trans failed.

@@joshuaackerman6968 You might be interested to know that the 4T65E has a forward band breaking problem and the sonnax fix is a longer push rod S84908H for that apply servo. As they age, the timing for various shifts becomes delayed by missing clutch and band material. The 4T65E measures this time and boosts pressure when the time is too long. And this results in maximum pressure just as the too short stock rod hits the band and band breakage is a common issue with those. In that case it's the forward band and when it's done broke itself like this, you are walking. So a further problem is the regulation of the pressure rise during this timed pressure rise and that particular valve (AFL) in that transmission wears out about the time the band does as well and this further aggravates the issue. That fix is kit K098 from superior. I would suggest every pressure kit sonnax has for yours to steer that problem away from the table. P1881 is a common code for my transmission and the sonnax rod appears to be 2/10 longer than stock and that is 200 thousandths - 0.200. Twenty won't even compensate for what has worn out, you need to shorten the timing drastically as they all do this timing thing. A better rig to build would be one that bolts on and measures how much it moves before you take it apart and then shorten that measurement by 0.010 so that the band isn't applied when not called for. I got my dial micrometer for 20$ from harbor freight and it would work fine for this. They will ship right to your door, I live the rural life. www.transmissionrepaircostguide.com/p1811/

Next vid on my channel. Im not sure where I spent money. Electricity?

Im not picking up what you are saying...

As I stated before. I’m one step from swinging in the trees... transmissions be tough. Also, was in a huge pinch. When I was done snow plowing for the year I rebuilt the entire transmission