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- - trans brake (https://67-72chevytrucks.com/vboard/showthread.php?t=300035)

just wondering if any body out their has install a transbrake in a th400 how hard is it do you have to pull the tranny out i just pick up a b&m trans brake with rev valve body trying to find some good pictures of instilling it b&m gives crap of instiction

There is more to it than just bolting in a valvebody. At least to make it survive there is. If your not familiar with the whole scenario I'd HIGHLY suggest you take it to a good trans shop and have the trans built for the brake. Most of the stock components will survive only a short time under the rigors of a transbrake launch.

Quote:

Originally Posted by Marv D (Post 2814246)

All of the "drag race" friends I have have told me the same thing. Let a PRO handle it.

There are too many modifications to be done inside . It has to come apart . I run a Hipster brake . Nine years ago when I put my truck back together I did alot of research on this and one of my friends builds my transmissions . We have gotten it to where it survives pretty well . We usually tear it down once a year . Usually we replace a bushing or two maybe one or two clutches and steels . It is amazing how much stock TH400 parts can take . I can tell you alot of little tricks that will help it survive . Three good ones are, drilling out the center support bolt so more fluid can go to the second gear clutches , using a stock type wave plate in the case for second gear , and putting a good cross hatch on the sprag surface everytime you have it down .(these are for sprag survival) . Another important thing on a TH400 is high gear clutch clrearance ! Dont be afraid to put 100 to 110 thou of clearance in them . The reason for this is when the tranny is in low gear those clutches are turning 1.5 times engine speed backwards .

A buddy of mine tried the DIY route, ended costing more in the end.

Need to take it to someone that knows how to build racing trans so you won't tear up all the other stuff

Just took the glide in to the shop for bell housing change and freshin up . Grand total $150 . Not worth messin with in my opinion .