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Sorry for the wait. I did all the little things like wireing, linkage lengthening, and cooler lines while I waited for my rear drive shaft. I got it shortened exactly 2 inches and it cost me 200 bucks. The truck is driving now and it cruises over 55 no problem. I used the diesel program on the...

The th400 tcase adapter is like 4in taller than the one on the 4l80e. so the 4l80e+1 in spacers+The square tube +the rubber isolator made it the height of the th400 adapter. the drivshaft angles are exactly the same as when the th400 was in it.

I welded some square tube to the cucv crossmember and used some 1in spacer between the trans and the rubber isolator. the turbo 400 dipstick worked with only one bend at the very top to get it more pointed forward

I pulled the th400, put a cap on the vaccume pump and put the 4l80e in. I also put the tps on and wired it to the painless harness

I just looked at the tc it has the low stall pattern of fins so now I’m sure it’s low stall thanks again for the info

oh ok thanks I missed that about the fins and yes I believe the transmission was rebuilt or replaced recently because it looked pretty good inside

Thanks for the info but I couldn’t find any numbers or anything stamped on my tc so I was just going to take my chances.

I realized for me to drive my cucv around a lot and for it to be practical I needed an overdrive. I looked at a lot of options such as nv4500, gearvendor, ranger+sm465 but I found the easiest and probably the cheapest swap for me was going to be a 4l80E. Right now I have most of the parts I need...