interchangeable parts between a th400 & 4l80e - Third Generation F-Body Message Boards


Go Back   Third Generation F-Body Message Boards > Tech Boards > Transmissions and Drivetrain
Search

Transmissions and Drivetrain Need help with your trans? Problems with your axle?
Sponsored by Hughes Performance
Click Here

interchangeable parts between a th400 & 4l80e

Reply
 
Thread Tools Search this Thread
Old 04-22-2010, 09:37 PM   #1
Member
 
Join Date: May 2009
Location: Petal Ms.
Posts: 406
Car: 1990 Iroc
Engine: 6.0
Transmission: 4l65E
Axle/Gears: 373 zexel torsen

Classifieds Rating: (3)
interchangeable parts between a th400 & 4l80e

I am trying to beef up a th400. I have a 4l80e thats to expensive to make work in my car. Does anyone know what parts will interchange between the th400 and the 4l80e? I talked to Dana but lost my notes about what he said to do. Thanks.
Dustytrix is offline vBGarage Page   Reply With Quote
Old 04-22-2010, 10:16 PM   #2
Moderator
 
AlkyIROC's Avatar
 
Join Date: Jul 1999
Location: 51N 114W, 3500'
Posts: 15,841
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86

Classifieds Rating: (0)

Re: interchangeable parts between a th400 & 4l80e

I don't know the exact list but I do know about 80% is interchangeable. They both share the same first 3 gear ratios so the planetaries are probably all the same. I don't know how the 4L80E engages the OD but I do know with a bunch of conversions that it's possible to make it a 6 speed by splitting the gears with the OD. Good for towing because it will keep the engine in the powerband easier. Instead of 1, 2, 3, 4(OD) you get 1, 1OD, 2, 2OD, 3, 3OD, 4(OD). Not really a 6 speed tranny because it uses the weak OD gear to get the extra gears.

Nothing about the valve body is interchangeable. Only the gears etc are the same. I'm pretty sure you can use the heavier duty clutch hub with 34 element sprag for the TH400 in the 4L80E.

Trying to use parts from the 4L80E to make a TH400 stronger is stepping backwards. The TH400 is actually stronger when using a few better aftermarket parts such as the 34 element sprag and clutch hub etc.
__________________
Hardtail Racing
All engine, no power adders! Bests: 9.029@150.45 (at altitude)
Theoretical sea level performance 8.623@157.05
AlkyIROC is offline vBGarage Page   Reply With Quote
Old 04-23-2010, 05:40 PM   #3
Member
 
Join Date: May 2009
Location: Petal Ms.
Posts: 406
Car: 1990 Iroc
Engine: 6.0
Transmission: 4l65E
Axle/Gears: 373 zexel torsen

Classifieds Rating: (3)
Re: interchangeable parts between a th400 & 4l80e

Thanks AlkyIROC, The 34 element sprag is one of the things that I think I was told to use. Also clutches but I dont know which ones. This is first time for me to be inside a transmission. I have the atsg book so there is only one way to learn right?
Dustytrix is offline vBGarage Page   Reply With Quote


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Transmissions and Drivetrain

Tags
400, 4l80, 4l80e, 4oo, body, build, fit, generation, interchangable, interchange, interchangeable, interchanged, parts, pictures, th400, turbo
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:22 AM.


All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details