Is anyone running a 4l80e transmission behing there big blocks. I'm starting to see more advertising for parts and kits for them, and I was curious if anyone has any experience with them. Seems to me, if you could find one for a decent price, it would be a great way to go. Heavy duty overdrive. Brett
I'm not running a 4L80E, but I was told it was the transmission in the (civilian) Hummer H1 (not H2). If it can be in a Hummer, I would think a Buick would be fine.
I looked into it a few years ago - by the time you are done with buying a core, getting it built with HD parts, a good converter, AND a computer to run it, you're near the $3,000 mark. I think you'd also need an adapter to get it onto our blocks. I was told that stock, Its not much more than a stock TH400 with an overdrive gear added. If you're not making the TQ and HP to need a "Built" TH400, then a stock unitl may be OK.......but then you could use a 200/700R4 which is lighter and has better gearing. Since I already have quite a few coins into my TH400 and converter I decided that if and when I do something, it would be to add a GearVendor OD unit. Starting from a clean slate.....its prolly a toss up money wise between these 2 choices
