Another Vibration... please help!
02-13-2009, 07:32 PM
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Another Vibration... please help! ok so ive searched the threads and i think it could be the DS but not positive...
heres the run down
before...
stock trans mount, stock rear sway bar, lowering springs, adj tq arm
after
BMR tq arm relocation kit, wolfe single sway bar, qa1s stock springs in rear, same adj tq arm
could the DS be out of balance and w/ stock pieces in the car " hide" the vibration of a DS, but then be noticeable after going to solid mount sus parts?
the vibration is from 80+ on accel,cruise, and deccel.
could it be the ds? or could it be tail shaft spacers and other things that ppl have experienced?
btw i have a stock DS w/ the 1350 yoke moser 12 bolt
TIA
Brandon
heres the run down
before...
stock trans mount, stock rear sway bar, lowering springs, adj tq arm
after
BMR tq arm relocation kit, wolfe single sway bar, qa1s stock springs in rear, same adj tq arm
could the DS be out of balance and w/ stock pieces in the car " hide" the vibration of a DS, but then be noticeable after going to solid mount sus parts?
the vibration is from 80+ on accel,cruise, and deccel.
could it be the ds? or could it be tail shaft spacers and other things that ppl have experienced?
btw i have a stock DS w/ the 1350 yoke moser 12 bolt
TIA
Brandon
02-13-2009, 08:04 PM
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Check your driveline working angles, now that there is a new crossmember on the trans, make sure the trans is at the same angle now as it was with your stock crossmember...you might need to shim the crossmember down or the trans up. This was one of my main vibe issues with my setup, I don't think your drivehaft would have anything to do with it considering you didn't have this vibe until after the relocating kit, the other parts you put on shouldn't have an effect on vibration.
Last edited by DiabloFormula; 02-13-2009 at 08:12 PM.
02-14-2009, 06:23 AM
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Come to think of it, if the TQ arm was moved to a differant location (lower at the trans then it was before) you probably throw you pinion angle off as well.
First you need to get a magnetic angle finder from Sears or some other hardware store, measure the angle at the tailstock of the trans and then measure the angle at the rear using the flat part on the mounting plate of the TQ arm, for example if your tran tailstock reads 2 with the angle finder pointing away from it that means you have a negative angle of 2 degrees on your tailstock and then if rear shows a angle of 1 with the angle finder pointing towards it, that means you have a postive angle of 1 degree, then you take your trans tailstock number which is 2 and subtract that from your rear angle number which is 1 and you get a negative 1 working driveline angle. All this is to be done while the car is level on the ground or on jacks with the rear loaded. By moving your Tq Arm to a differant postion you have now thrown off the angle off pretty much everywhere. It's easy to fix just takes a minute to figure it out. Here's a few links that will help you understand more of whats going on.
https://ls1tech.com/forums/gears-axl...ion-angle.html
https://ls1tech.com/forums/suspensio...ion-angle.html
/\ /\ /\ Post 22 is a good referance.
https://ls1tech.com/forums/gears-axl...nsmission.html
/\ /\ /\ The bushing is not your problem, but this post has some good info on angles too.
Hope this helps you.
First you need to get a magnetic angle finder from Sears or some other hardware store, measure the angle at the tailstock of the trans and then measure the angle at the rear using the flat part on the mounting plate of the TQ arm, for example if your tran tailstock reads 2 with the angle finder pointing away from it that means you have a negative angle of 2 degrees on your tailstock and then if rear shows a angle of 1 with the angle finder pointing towards it, that means you have a postive angle of 1 degree, then you take your trans tailstock number which is 2 and subtract that from your rear angle number which is 1 and you get a negative 1 working driveline angle. All this is to be done while the car is level on the ground or on jacks with the rear loaded. By moving your Tq Arm to a differant postion you have now thrown off the angle off pretty much everywhere. It's easy to fix just takes a minute to figure it out. Here's a few links that will help you understand more of whats going on.
https://ls1tech.com/forums/gears-axl...ion-angle.html
https://ls1tech.com/forums/suspensio...ion-angle.html
/\ /\ /\ Post 22 is a good referance.
https://ls1tech.com/forums/gears-axl...nsmission.html
/\ /\ /\ The bushing is not your problem, but this post has some good info on angles too.
Hope this helps you.
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02-14-2009, 02:01 PM
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I'd recheck the angle of your trans with the stock crossmember on and then with the new crossmember on, if the new one raised or lowered the trans even 1 or 2 degrees, your pinion will never be correct.