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Driveline Vibration

 
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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Fri Apr 03, 2015 2:40 pm    Post subject: Driveline Vibration Reply with quote

I took the Camaro for a ride on the highway yesterday and the drivetrain vibrates a lot. I haven't looked into it yet but and looking for suggestions. Here's what I'm going to look into.

I lowered the car about 1.5 inches and didn't change the torque arm. Lowering it probably messed with the pinion angle. So planning on checking the pinion angle and getting an adjustable torque arm.

The U-joints felt good when I pulled the driveshaft out but I can't remember when I replaced them last. Thinking I should put in new u-joints and have the shaft balanced.

The weird part is the vibration is much worse in Drive compared to OD. Wondering if something inside the 4L60E is bad.

I also replaced the transmission mount with a poly one and that made the vibration really bad. Thinking of getting a new stock transmount.

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Knarley Darley
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PostPosted: Sat Apr 04, 2015 3:40 am    Post subject: Reply with quote

Trans mount is pretty easy to change, and inexpensive. Make sure the lowering didn't cause the shaft to bottom against the rear of the trans.
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squeeezer
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1991 Chevrolet Camaro

PostPosted: Sat Apr 04, 2015 9:49 am    Post subject: Reply with quote

Did you put the extra shim stock/spacer in for the trans mount
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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Sat Apr 04, 2015 11:47 pm    Post subject: Reply with quote

Knarley Darley wrote:
Make sure the lowering didn't cause the shaft to bottom against the rear of the trans.

I don't think it does but I'll have to check.

squeeezer wrote:
Did you put the extra shim stock/spacer in for the trans mount

No, I swapped in the new poly mount as is.

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Paul P
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1971 Chevrolet Chevelle

PostPosted: Sun Apr 05, 2015 12:45 pm    Post subject: Reply with quote

If you lowered the car you will need an adjustable torque arm to get the pinion angle correct. Vibrations are very likely if things are not at angle. Did you replace the tail housing bushing for the driveshaft in the trans?
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squeeezer
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1991 Chevrolet Camaro

PostPosted: Sun Apr 05, 2015 6:59 pm    Post subject: Reply with quote

That shim is for lowered cars
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af2
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1933 Willys Coupe

PostPosted: Sun Apr 05, 2015 8:16 pm    Post subject: Reply with quote

Yep!!! Depending on the lowering it needs to be looked at.
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