4/8/05

Mike I recently rebuit my 400 turbo and got talked into putting one of those so-called shift kits from napa auto. It shifts extremely hard like I want, but the biggest problem is I hold it in first gear past 5000, not cool on my Pro Street/ drag S10. Are there any valve body kits I can purchase without having to dissmantle my trans. to get rid of the napa parts? I was told I could lock up my gov. but I drive this every day in the summer and I don't want the hassle of shifting it everytime I leave the red light. Thank you, Rick

Rick,

Back in 1965 possibly when the first big blocks came out, General motors had a problem with customers over revving the engines and causing damage to the engines. So Hydromatic built a system into the 400 valve body that even with the shifter in manual low it would still shift at about 5000 RPM to save the engine. Most of the better shift kits have the modifications in them to deal with this, it does involve changing the 1-2 shift valve and plugging the casting, otherwise it will shift no matter what you do!

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

ADVERTISEMENT

To contact Mike Stewart email trannytech@dragracingonline.com