Manual shifting/d-shifting
12-14-2007, 09:03 AM
#2
I'll be danged! I have family down in Cibolo... even got a danged speeding ticket there many years ago! Lot's of family down in the Hill Country in fact. One of my cousin's is the Mayor of Lockhart, a little north of you.
You have asked a bit of a loaded question. In factory stock trim the PCM will inhibit downshifts until it is "safe" for the unit to do so. That should tell you something right there.
The older 3 speeds can and will suffer damage if they are abused with high rpm downshifting. Sprags can break, drums can explode and so on. Furthermore, if a 3 speed is shifted into neutral at the end of a very high speed /rpm pass it can explode.
SPecifically, why do you ask? Is there a particular style of racing you are wanting to do?
g
You have asked a bit of a loaded question. In factory stock trim the PCM will inhibit downshifts until it is "safe" for the unit to do so. That should tell you something right there.
The older 3 speeds can and will suffer damage if they are abused with high rpm downshifting. Sprags can break, drums can explode and so on. Furthermore, if a 3 speed is shifted into neutral at the end of a very high speed /rpm pass it can explode.
SPecifically, why do you ask? Is there a particular style of racing you are wanting to do?
g
12-15-2007, 09:11 AM
#6
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if you want to safely manually shift an automatic transmission - you'll need a manual valve body.
if you're trying to manually shift a factory 4l60e valve body/shifter, you're just asking for trouble. besides, the PCM will be able to shift the car where you want it to be shifted every time, why mess with that???
if you're trying to manually shift a factory 4l60e valve body/shifter, you're just asking for trouble. besides, the PCM will be able to shift the car where you want it to be shifted every time, why mess with that???