4l80e - Third Generation F-Body Message Boards

Dustytrix · 10-25-2009, 09:11 PM

Has anyone tried or put a 4l80e in their 3rd gen? What can I expect if I try and put one in? I know I will have to make trans mount different on crossmember. But as far as fitting next to floor pan, will I have any mods to do?
Thanks Dusty

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Stephen 87 IROC · 10-25-2009, 09:47 PM

Quote:

Originally Posted by Dustytrix

will I have any mods to do?

Lots. It's a big heavy transmission.

As always, it's suggested that you use the search function to find other threads related to your question. It's not the first time it's been asked.

Dustytrix · 10-25-2009, 09:58 PM

Thanks Stephen, I used the search function and only got one article by Mac (installing 4l80e)

Dustytrix · 10-25-2009, 10:01 PM

My bad I put 480le instead of 4l80e. Thats why I got only one answer by Mac

WIll36 · 10-26-2009, 10:17 PM

search topradman's user profile. He had a long article with pictures about what he did to get one in his IROC. The 4L80 is a very heavy duty trans, from what I know it's the same guts as a TH400 just with adjustable line pressure

DSmith · 10-26-2009, 10:32 PM

My dad has one in a work truck that had just been rebuilt when the engine chunked a rod. If you are interested I can see what he would take for it. The truck is in Philadelphia Ms

Stephen 87 IROC · 10-26-2009, 10:32 PM

About 80% of the internal parts are the same however the electronic valve body makes the valve body much bigger. Add in the OD and the tranny becomes bigger.

Estimated weight of a complete 4L80E is around 250 pounds. A TH400 is only 130. My powerglide is around 95

ed o · 10-27-2009, 01:38 AM

as a builder building the guts all the way up to the overdrive section is approximately the same as a th400. After that it changes a lot. In all I'd say approx. 60% is the same at best. Seen a lot of 4L80E's lately with no reverse engagement. sad

. but fixable.

Dustytrix · 10-28-2009, 09:40 PM

Thanks for the replies I have also read its only 40lbs heavier than 700r, but I have all 3 and will put them on a scale then I will know. The reason I am interested is the heavy duty (withoverdrive) if weight is such a big deal I can always ditch someother part of the car.Just wanting one of the best long term strongest tranny to fit in a 3rd gen car.