The 1947 - Present Chevrolet & GMC Truck Message Board Network

Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain


Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 06-29-2018, 05:53 PM   #1
Registered User
Join Date: May 2016
Location: Gulfcoast, MS
Posts: 57
4l80e Overdrive planetary thrust bearing failure

My 2003 completely stock 4l80e quit making line pressure and I noticed it starting to slip in 2nd gear and the TCC slips when locking. When I tore into it I found that the overdrive planetary and the forward clutch assembly was damaged due to what apprears to be a thrust bearing failure. But I am not sure what caused this to happen maybe a lubrication problem or possibly a bad bearing due to rust since the transmission sat a long time before being used. Just want to do all I can do to prevent it from reoccurring. I am wanting to build this transmission to hold big power so I have recently ordered a stage 5 kit from Jakes Performance, plan to rollerize the rear case, run a triple disc converter and run tight end clearances. From what I have read the input shaft splines on the overdrive planetary is not a common failure but since mine is damaged I am thinking about going with a TCS or PATC overdrive planet with a hardened input billet spline hub. This is my first 4l80e build and I feel I have gained a lot of knowledge from forums like this one. Any tips or ideas that caused this issue are greatly appreciated!
Attached Images
2006 GMC X-cab Z71 5.3LS
1994 GMC 1500 LWB 2wd
1989 Chevy Crew v3500 4x4 12 valve Cummins swap
shootracing22 is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 02:49 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013