Getting a firmer shift in GM400 trans
#1
#3
I put a TransGo shift kit in JagZilla, when she still had an automatic. Made a world of difference, because I was able to downshift to any gear at any speed, and I was able to hold 1st and 2nd to redline. The stock Turbo 400 upshifts before the V12 ever gets into it's powerband.
Here's the kit I bought at Summit Racing:
http://www.summitracing.com/parts/tr...make/chevrolet
Here's the kit I bought at Summit Racing:
http://www.summitracing.com/parts/tr...make/chevrolet
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86jag (05-07-2014)
#4
I put a TransGo shift kit in JagZilla, when she still had an automatic. Made a world of difference, because I was able to downshift to any gear at any speed, and I was able to hold 1st and 2nd to redline. The stock Turbo 400 upshifts before the V12 ever gets into it's powerband.
Here's the kit I bought at Summit Racing:
http://www.summitracing.com/parts/tr...make/chevrolet
Here's the kit I bought at Summit Racing:
http://www.summitracing.com/parts/tr...make/chevrolet
#5
You just pull the gear selector down to 2nd or 1st, and the transmission drops down to that gear, and stays there until you manually push the selector up to 2nd or Drive, just like with a manual transmission. Common sense is required - for instance, I wouldn't recommend downshifting to 1st at 70mph, unless you just want to blow your motor, because the rpms will increase in direct relation to your vehicle speed vs your gear choice.
#6
You just pull the gear selector down to 2nd or 1st, and the transmission drops down to that gear, and stays there until you manually push the selector up to 2nd or Drive, just like with a manual transmission. Common sense is required - for instance, I wouldn't recommend downshifting to 1st at 70mph, unless you just want to blow your motor, because the rpms will increase in direct relation to your vehicle speed vs your gear choice.
Will the GM TH-400 torque converter be able to handle the high RPM's? I know from my muscle car days that the 400 is a tough tranny but I'm not to sure about the converter.
Can you use F type ATF(less slippery fluid) to firm up the shifts? I do know guys that have used this in the 400 for other applications.
#7
Will the GM TH-400 torque converter be able to handle the high RPM's? I know from my muscle car days that the 400 is a tough tranny but I'm not to sure about the converter.
Can you use F type ATF(less slippery fluid) to firm up the shifts? I do know guys that have used this in the 400 for other applications.
Can you use F type ATF(less slippery fluid) to firm up the shifts? I do know guys that have used this in the 400 for other applications.
I never ran F type fluid in my Turbo 400, but, according to Kirby's book, and members on another forum, it doesn't hurt the transmission to do so.
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JagZilla (05-07-2014)
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