8/8/05

Mike, I was wondering if you could help me with my TH400 Trans. I have trouble with the clutches in 2nd gear burning after about 50 passes. This is a pro brake, 5 clutch 1st gear, 6 clutch high pack, 3 clutch inter. We put together all our own transmissions and they seem to do the same thing. Are there tricks that we don't know about that would help this situation? Please help. Thanks, Ron Szewczyk Buffalo, NY

Ron,

Going on the limited information in your question I can generalize an answer. Holding power in a clutch pack or band is: A. Combination of a friction surface or B. Apply pressure. So if you set up the intermediate clutch with a 4 clutch pack that might get you more longevity. But you will need to take a pressure reading off the transmission also. Just to check that part of it.

Pressure needs depends on engine torque and vehicle weight usually use 180-220 PSI. A transmission pressure gauge kit can tell you this. The 1/8 pipe pressure tap is located just behind the shift shaft on the drivers side of the case. It will read in all the gears.

As far as your clutch pack your stock 3 pack can be tuned up by installing a 4 pack this gives quite a bit more surface area. Then the only thing you have to worry about is how good your intermediate sprag is. But that is another question all together.

Thanks,

Mike

Mike’s Transmission
Lancaster CA
(661) 723-0081

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