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Re: Driveline vibe, pinion angle
[Re: desomod]
#993945
05/16/11 10:37 PM
05/16/11 10:37 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I will defer to Doctor Diff (& others) for the final word on this but I think you want the pinion down (neg?) several deg as it will rise on accel
live every 24 hour block of time like it's your last day on earth
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Re: Driveline vibe, pinion angle
[Re: desomod]
#993946
05/17/11 02:14 AM
05/17/11 02:14 AM
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Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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Quote:
...Also in checking driveline angles, the pinion is 3* up, the trans tailshaft is down 3*, the driveshaft was nearly in line with the pinion.
I know there needs to be a few degrees of driveshaft angle to lube the u-joints but do you think the way this sits it would cause vibration?
Yes, I've heard it will cause a vibration and excessive wear, but it may not be the sole source of your vibration. The u-joints need to have some movement as the driveline rotates. You can use shims to nose down the rear 3 or 4 degrees.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Driveline vibe, pinion angle
[Re: jbc426]
#993947
05/18/11 11:01 AM
05/18/11 11:01 AM
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Joined: Jan 2003
Posts: 5,788
Hamilton, Ontario Canada
Magnum
master
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master
Joined: Jan 2003
Posts: 5,788
Hamilton, Ontario Canada
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Pinion should be nose down relative to the driveshaft.
Are you saying your tailshaft is down relative to the driveshaft? Is this from a lowered car? Usually a driveshaft is down from the transmission.
You said the pinion is almost straight to the driveshaft. 3 degress is not much at the other end but if your goal is no vibration. The answer is matching angles. The less the better. Since I agree zero is not good for universal joint bearings. 1 to 2 degrees max.
69 Super Bee, 93 Mustang LX, 04 Allure Super
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