TH400 line pressure???
#1
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TH400 line pressure???
I just got my truck running again tonight since building the trans back. I took it for a drive tonight and my pressure gauge is hitting between 300-320 psi. This is a TH400 with a Jake's stage 2 kit, 4000 stall converter, TCI rmvb w/ transbrake, 5 forward-6 direct-4 intermediate. Clutch pack clearances checked and good. Intermediate support and heavy snap ring. I used the boost valve from Jakes kit and the TCI spring. My question is....for a primarily race only 3700lb truck, is the pressure to high? I've read where most advise against anything over 200-250psi but have also read some that say 300psi is fine for racing. Am I going to wipe out the thrust bearings in my LQ9? Thanks
#2
I just got my truck running again tonight since building the trans back. I took it for a drive tonight and my pressure gauge is hitting between 300-320 psi. This is a TH400 with a Jake's stage 2 kit, 4000 stall converter, TCI rmvb w/ transbrake, 5 forward-6 direct-4 intermediate. Clutch pack clearances checked and good. Intermediate support and heavy snap ring. I used the boost valve from Jakes kit and the TCI spring. My question is....for a primarily race only 3700lb truck, is the pressure to high? I've read where most advise against anything over 200-250psi but have also read some that say 300psi is fine for racing. Am I going to wipe out the thrust bearings in my LQ9? Thanks
Ditch the TCI spring, use what we provided and your pressures won't kill the pump and engine thrust.
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I was kind of torn on which way to go when I assembled the pump. The old pump had to be replaced. The boost valve didnt look so hot in the new TCI pump so I used the one out of the kit. I was reading the tips on the papers sent with the rebuild kit and it recommended using the spring that came with valve body originally which is a RMVB TCI transbrake unit. I guess I will pull it back out when the ladder bars go in and put the softer spring in.