I just swapped out my TH400 with a new BTO TH200-4R.
My truck had a 3.08 rear & the truck was not happy locked up on the freeway at 70 running 1200 RPM.
So I Just got finished rebuilding my rearend, put in a posi & 3.73 gears. WOW what a difference!
SO I have some observation on the TH200-4R after the first few 100 miles.
1 - had to go back and forth to get the best matching Governor for my full throttle shift point, out of the box it was shifting WAY to early.
2- When locked up in 4th, if you slow down without hitting the brake, the tranny stays locked in forth. so you can slow down to a crawl 40mph and the tranny stays locked in 4th, you either have to hit the brakes or push the throttle 3/4 way to the floor before it will down shift or unlock.
3 - The tranny locks up really fast in 4th, so if you have real high rear gears (3.08) you will find that driving slow in 4th is painful.
4 - The TH200-4R and a rear gear of 3.73 is a match made in heaven, what a fun ride & freeway cruiser.
I have alot of images of the install, feel free to check them out here,
TRANNY INSTALL ALBUM
A few from the Album,
Any questions, feel free to hit me up!
Good luck!