Driveshaft install ? for T56; how much should I shorten it?
#1
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I previously had an LT1/T56 in my cutlass; when I try to install my driveshaft its just a bit too long to clear whatever goes into the rear axle (don't know name). It looks like the rear of the tranny is about a 1/2 inch further back than before--but I'm not exactly sure. I'd like to take as little off as possible, but don't want to have to take it back to pay for a second shortening. Given this pic, is 1/2 inch enough? How much yoke do you really need inside the tranny--i.e., would it hurt to go 1" just to be safe. 2nd pic has the yoke as far in as it will go. Thoughts?
#4
TECH Fanatic
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LOL, it wasn't, but if you don't wanna pay to have the drive shaft shortened that is the only way. I think I would pay, can't be but $100 for a shorten and balance. I would go 1.25" at least.
#5
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ooh. Now I see. Yes, I'm going to pay to have it shortened, but I'd like to only do it once. So if I take off only 1/2" and its not enough, then I have to pay again. Quote in town is $65 for steel driveshafts. I'm worried that 1.25" would leave too much of the yoke out. I'm thinking about .75".
#7
TECH Resident
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According to the book "GM LS-Series Engines: The Complete Swap Guide", moving your drivetrain 1/2 inch in either direction should be fine without changing the driveshaft length. Any more than that, and you need to change it.
*on page 171
*on page 171