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Author Topic: Rear driveshaft vibe  (Read 5614 times)

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Offline Knox

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Re: Rear driveshaft vibe
« Reply #15 on: February 13, 2012, 08:41:46 AM »
where do you guys get the cv double cardans rebuilt?
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Offline Bnine

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Re: Rear driveshaft vibe
« Reply #16 on: February 13, 2012, 10:46:16 AM »
Try clocking it 180 to see if it changes at all. If it does, that definately would confirm your balance.
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Offline specialk

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Re: Rear driveshaft vibe
« Reply #17 on: February 13, 2012, 10:52:31 AM »
Quote from: Knox on February 13, 2012, 08:41:46 AM
where do you guys get the cv double cardans rebuilt?

Pat's or DSI
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Offline frenchy

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Re: Rear driveshaft vibe
« Reply #18 on: February 13, 2012, 01:12:08 PM »
Quote from: Knox on February 13, 2012, 08:41:46 AM
where do you guys get the cv double cardans rebuilt?
In my garage  ;D
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Offline Bnine

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Re: Rear driveshaft vibe
« Reply #19 on: February 13, 2012, 06:59:22 PM »
Quote from: Knox on February 13, 2012, 08:41:46 AM
where do you guys get the cv double cardans rebuilt?

Danco. Right by the old DSI over by modern.
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Offline Vinman

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Re: Rear driveshaft vibe
« Reply #20 on: February 13, 2012, 07:40:38 PM »
So I took the driveshaft back into Pat's this morning and they initially said my angles were wrong, the angle at the t-case must match the angle at the pinion to cancel each other out.
I disagreed and said anything I have ever seen with a double cardon joint had the pinion pointed straight in line with the shaft less a degree or so.

They agreed to double check the balance and it was off. Apparently the machine had been set up for a DS with a 4" tube and mine was 2-1/2".

I will get the shaft back in tonight but won't be able get it up to speed given the road conditions out here.

I'll report back after a road test.

Vince
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
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Offline Spinalguy

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Re: Rear driveshaft vibe
« Reply #21 on: February 13, 2012, 08:35:08 PM »
Quote from: Bnine on February 13, 2012, 06:59:22 PM
Danco. Right by the old DSI over by modern.
That is where i go, Wherever Cory works is where i follow. Used to be next door at DSI, now at Danco.
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Offline Bnine

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Re: Rear driveshaft vibe
« Reply #22 on: February 14, 2012, 10:03:15 AM »
Quote from: Spinalguy on February 13, 2012, 08:35:08 PM
That is where i go, Wherever Cory works is where i follow. Used to be next door at DSI, now at Danco.

Exactly. Cory is without a doubt one of the best driveline guys around, and he treats us better then those big shops.
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Offline Vinman

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Re: Rear driveshaft vibe
« Reply #23 on: February 14, 2012, 01:58:37 PM »
Quote from: Bnine on February 14, 2012, 10:03:15 AM
Exactly. Cory is without a doubt one of the best driveline guys around, and he treats us better then those big shops.

Well that's good to know, right after I spend $600.00 at Pats :'(
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
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Offline NUXJR

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Re: Rear driveshaft vibe
« Reply #24 on: February 14, 2012, 03:06:26 PM »
Quote from: Bnine on February 14, 2012, 10:03:15 AM
Exactly. Cory is without a doubt one of the best driveline guys around, and he treats us better then those big shops.

Yiup Cory da dude!!!!!!  He da one dat set-up the rear drive shaft for de ol XJ....only had to do it once, good to go!!! ;D
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Offline Vinman

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Re: Rear driveshaft vibe
« Reply #25 on: February 14, 2012, 07:48:01 PM »
Re-balanced DS back in and ran it up to about 110kmh, vibes about 95% gone. I should be able to dial it in a bit better with the pinion angle.

Right now the pinion is 1 degree below the DS, should I be going up to a zero angle or down and increase the angle?

Vince
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
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Offline Rubi03 jef

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Re: Rear driveshaft vibe
« Reply #26 on: February 14, 2012, 08:19:18 PM »
Down.  Increase the angle a bit.  U joints need to see some kind of angle for them to work properly

U want those needle bearings moving inside the caps when it  rotates if not ull just wear out the u joint by running on the same few needle bearings

« Last Edit: February 15, 2012, 12:05:53 PM by Rubi03 jef »
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04 rubicon <4'' X series RC lift, 1.25'' RC body lift, 1'' RC MML, CV rear drive shaft,  Stubby front bumper, CB,35 MTZ" ,Hi Lifter 54'',LED tail lights , flat fenders, LED front Flasher, half doors, Light force spots, and CDN M101 custom Military trailer

Offline Vinman

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Re: Rear driveshaft vibe
« Reply #27 on: February 14, 2012, 09:09:46 PM »
Quote from: Rubi03 jef on February 14, 2012, 08:19:18 PM
Down.  Increase the angle a bit.  U joints need to see some kind of angle for them to work properly

U want those middle bearings moving inside the caps when it  rotates if not ull just wear out the u joint by running on the same few middle bearings



Thanks Jeff, I'll play around with it tomorrow night.

Vince
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
. 
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Offline Knox

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Re: Rear driveshaft vibe
« Reply #28 on: February 15, 2012, 08:11:16 AM »
Quote from: Vinman on February 14, 2012, 01:58:37 PM
Well that's good to know, right after I spend $600.00 at Pats :'(

diddo, I go to pick up my front ds today at Pats

and yeah 2 degrees below seems to be the standard suggestion
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