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

 

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.

 

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

 

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

 

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

 

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

 

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

 

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.

 

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.