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Aug 9, 2009 | 02:17 PM

09jyounger

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From: Hays, Kansas

Th400 Build.

I am rebuilding a Th400 with rmvb and trans brake and I am wondering what everyone is doing to to strengthen the center support. I've looked into case savers, but I was curious if there are any other options.

Aug 9, 2009 | 08:14 PM

FLT

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I always make sure that the area where the support is bolted to the case looks good. I have seen where the support actually wears the case and it will make a knocking sound while not in first gear. I personally can not remember ever seeing a case saver for a th400 so I'm not sure what you are talking about there. I think the best thing to do is make sure you adjust the rear and front end plays of the unit. Also make sure that all your bushings are good and tight. Vince

Aug 9, 2009 | 11:22 PM

WE TODD DID

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Quote:

Originally Posted by 09jyounger

All the case savers do, is help aid in not knocking out the intermediate snap ring lugs. As long as you don't have excessive line pressure, and set the intermediates up on the tight side, .010 per friction, you shouldn't have a problem knocking out the case lugs. They make an hd snap ring for the intermediates, but I've built a ton of them without that. You can also leave the cushion plate in the intermediates.

A little tip for setting your intermediate clearance, you can use a fwd drum snap ring from a torque flight 8. They are selective, and come in different thicknesses.

Aug 9, 2009 | 11:34 PM

pyronotic138

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i am actaully the one building this th400 for the car. and the problem we have run into before on several RMVB with t-brake setup. well. the brake dont hurt anything. the problem is there is a pin that gives max line pressure causing a sudden hard impact. well on every unit i have seen before that is like this. all the tabs in the case break off and causes intermediate clutches to move freely. i didnt know if anyone out there has ever drilled a case or anything to fix this problem. if so please give some tips. i have a clue what to do but its alot of mods

Aug 10, 2009 | 01:37 AM

pyronotic138

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i beleive i found out how to reinforce it after i studied the case for a while. it will require the case being drilled at least 2 or 3 holes. which bolts will go in to hold a retainer plate to the snap ring and steels in the intermediate clutch. i beleive we can do this becuase RMVB setup do not use a band. and that will give enough room for anything to be reinforced

Aug 10, 2009 | 06:05 PM

WE TODD DID

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I'm not sure what pin you are referring to. The pr spring is in the pump. You should look into lowering the line pressure if you're having cases fail due to that. 200-220 psi is more than enough.