th350 build mod - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MylilBowTie · 02-24-2007, 01:24 AM

Full manual valve body is mainly for the track. You have to shift every gear every time. You have to shift the transmission just like a manual transmission but no clutch. That's not to say its a manual now. Just have to shift gears constantly like one.

The reason why your th400 shifts out of first is that it is a over rev protection. You can make it hold 1st gear as long as you want if you install a plug in the valve body.

About the only thing you can do to the th350 is get a higher stall convertor. But it kind of defeats the real perpose of needing one. It also isnt a very good idea to put money into a weak and failing transmission. I would go with a Transgo shift kit/ shift improver after it gets rebuilt.

02-24-2007, 01:24 AM	#11
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: th350 build mod Full manual valve body is mainly for the track. You have to shift every gear every time. You have to shift the transmission just like a manual transmission but no clutch. That's not to say its a manual now. Just have to shift gears constantly like one. The reason why your th400 shifts out of first is that it is a over rev protection. You can make it hold 1st gear as long as you want if you install a plug in the valve body. About the only thing you can do to the th350 is get a higher stall convertor. But it kind of defeats the real perpose of needing one. It also isnt a very good idea to put money into a weak and failing transmission. I would go with a Transgo shift kit/ shift improver after it gets rebuilt. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI



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