Mike, I'm fairly new to drag racing. I recently purchased a 350 turbo from a friend of mine. It was a spare for his NHRA stock class Camaro. I had it gone through at the shop that originally built it. Everything is in great shape. My car will sometimes creep forward after the transbrake is activated, while waiting for the tree. I accidentally burned the solenoid and had to get an aftermarket solenoid (TCI).

I noticed the old one was adjustable, but the new one is not. I was wondering is this problem could be the reverse band may not be activating far enough. Is that possible? Hipster brake works fine backing up. Could it be the fluid level? I have a deep pan on it. I have the fluid level in the appropriate area for the dipstick that came with the car. Stock converter was cut and adjusted by Custom Converter Engineering.

Thanks for your time.
Dave Freeman

Dave,

Thanks for your letter. The transbrake valve placement in the case is very important. If the valve is barely sealing the passage in the case, it may back up fine because there is very little load to back up, but it may not seal well enough to hold the transbrake at hard throttle. The bad thing is you have to pull the valve body to check it.

Another possibility is that usually stock and super stock units are built with the minimal amount of clutches and a minimum pressure. In other words, just barely enough to do the job. Something you might try is to stage the car at a higher rpm above idle to possibly create more line pressure. It may not have enough pressure or clutch surface to hold your car.

At normal operating temperature, transmission fluid level should be somewhere around pan gasket level to a half-inch above.

Hope these suggestions help with your problem.

Mike

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