danielallen

1997 chevy 3500 with the 4l80e trans just rebuilt ...drove it for 2 weeks before it lost all gears...checked fluid all good but if I shut the truck off and back on I regain all gears

clinebarger

Change the filter, Use ONLY OEM Filtran filters. They are available though GM dealers & Isuzu Commercial truck dealers.

"IF" the filter is the issue, One of three things is going on.......
-The filter is clogged with debris....In this case the pan will be full of debris & you need to contact your builder.
-The filter is a aftermarket POS.
-The builder used WAY to much assembly lube or an assembly lube not made for transmission assembly.

danielallen

changed the filter didn't see anything in the pan a transmission guy said he never heard of it before ...he told me to change the speed sencer ,

clinebarger

"lost all gears" to me means it won't move at all......Is that the case? Or does it not shift?

danielallen

ya same thin g change the speed sencer and now I lost all gears

Jays_SSZ28

iTrader: (2)

You can provide more information.

Like "trans just rebuilt" but has no warranty, you could explain how that worked out.

danielallen

the transmission was just rebuilt ,has no warranty,i drove it for two weeks and it shifted fine.one my way home the other day it shifted to second gear so I let of the gas..try to push the gas gas again and had no gears ..I pulled over and shut the truck off and back on and the gears came back..the next day I pulled the pan and there was nothing in the pan and filter was clean its a 97 chevy 3500 ...no dash lights on

01ssreda4

iTrader: (96)

Any trans codes stored in the computer? No gears means NO movement, or it will shift sometimes?

danielallen

no codes in the the computer ,no movement at all ....fells like its not engaging at all.it made no noise when I lost them and the trans fluid it looks clean and don't smell burnt ..

01ssreda4

iTrader: (96)

So everything is like neutral?

danielallen

ya it fells like everything is in neutral ,move throw the gears and it feels like its not engaging ..its weird drove fine for two weeks then started this..

Jays_SSZ28

iTrader: (2)

Must be a budget rebuild to not have a warranty. I'd take it back to whoever rebuilt it.

Theres a long list of things that can cause this. I'm not typing it all out.

Jays_SSZ28

iTrader: (2)

Did the speed sensor get changed? How about the wiring to it, could also be a wiring problem.

Jays_SSZ28

iTrader: (2)

Check the ground wiring.
Are you willing to put a pressure gauge on this?
It really sounds like you're not into screwing with it, might be better to take it to a shop.

brandon6.0

iTrader: (32)

Check trans power fuse for power.

bbond105

Even without power or a ground to the trans shouldn’t the truck at least move in reverse and forward unless there is a mechanical problem?

JoeNova

Yes, when you put the shifter in gear on an 80e and it doesn't have power (neither solenoid is on), it will only have 2nd gear.

Jays_SSZ28

iTrader: (2)

Forgot about that.

The last 4L80E I built for a guy at work still had the same problems.
He found out a previous owner hacked up the wiring harness for the entire truck, he replaced it all and had no further problems.

I was 100% sure there was nothing wrong with my build.