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09-01-2010, 04:44 PM
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#1 |
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Registered User
 Join Date: Nov 2009
Location: Longview, Texas
Posts: 775
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Pinion Angle
Hey guys, does 5 degrees of pinion angle sound correct? I did some math and figuring and that is what i have come up with. I cannot check it because i have no motor or tranny in my truck at the moment. Just wanting to confirm this before i weld the axle perches in place.
Last edited by CVA59; 09-01-2010 at 04:45 PM. |
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09-01-2010, 08:47 PM
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#2 |
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Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: Pinion Angle
Three to five degrees down depending on what angle your transmission is at bolted in....
__________________
`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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09-01-2010, 08:56 PM
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#3 |
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Registered User
Join Date: May 2010
Location: jackson, michigan
Posts: 246
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Re: Pinion Angle
always set all my hot rods between 3 and 5 degrees and never a problem. Can't remember where i got the info, but it was years ago. Craftsman makes a nice magnetic angle finder and it's fairly cheap. In fact just changed my old truck to a 350 auto this last week, had to build a crossmember, set it a 3 degrees.
www.picturetrail.com/skysoldier173rd Last edited by skysoldier173rd; 09-01-2010 at 08:57 PM. |
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09-01-2010, 09:59 PM
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#4 | |
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Registered User
Join Date: Nov 2009
Location: Longview, Texas
Posts: 775
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Re: Pinion Angle
Quote:
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09-02-2010, 12:31 AM
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#5 |
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Registered User
Join Date: Sep 2008
Location: San Carlos, Ca.
Posts: 3,048
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Re: Pinion Angle
Yes 3 to 5 degrees down when compared to the drive shaft which should also be 3 to 5 degrees down from the transmission. I had often heard that the angle of the transmission yoke should be the same as the angle as the pinion yoke.
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09-02-2010, 01:07 AM
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#6 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: Pinion Angle
You know what Zack, I need to appologize. I gave you some bogus info in your other thread regarding the pinion angle. I said that the pinion was 14 degrees up from the trailing arm mounts. Well, that was actually 4 degrees up from the trailing arm mounts. Only explanation is apparently I had my head somewhere it didn't belong at the time......
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09-02-2010, 06:37 AM
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#7 |
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Registered User
Join Date: May 2010
Location: jackson, michigan
Posts: 246
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Re: Pinion Angle
I heard the same as GENIII above in his post, that the pinion angles offset with equal angle, only one up and one down about the same amount (3 to 5 degrees). I have seen shims used also to obtain the proper angle on trans mounts if the crossmember comes out too low to bring it up.
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09-02-2010, 08:27 AM
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#8 | |
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Registered User
Join Date: Nov 2009
Location: Longview, Texas
Posts: 775
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Re: Pinion Angle
Quote:
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09-02-2010, 08:37 AM
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#9 |
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Senior Car Nut
Join Date: Jan 2008
Location: shellman bluff, GA
Posts: 1,411
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Re: Pinion Angle
see page 5 for rules on angles:
http://www2.dana.com/pdf/J3311-1-HVTSS.PDF basically, as mentioned above, the angle of the transmission and the angle of the pinion should be as close to equal (but opposite) AND there should be some angle at the u-joints
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Larry |
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09-02-2010, 10:25 AM
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#10 |
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Registered User
Join Date: Nov 2009
Location: Longview, Texas
Posts: 775
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Re: Pinion Angle
Thanks guys. I will review this info and go from there.
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09-03-2010, 12:18 AM
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#11 |
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Registered User
Join Date: Mar 2003
Location: San Francisco, CA USA
Posts: 2,454
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Re: Pinion Angle
Just to clear up any possible misunderstanding, the pinion shaft should be PARALLEL to the transmission output shaft. You can call them opposite angles if you want to, but relative to true horizontal, the angle is the same (and the same direction) on both.
Ray |
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09-03-2010, 08:23 AM
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#12 | |
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Senior Car Nut
Join Date: Jan 2008
Location: shellman bluff, GA
Posts: 1,411
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Re: Pinion Angle
Quote:
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Larry |
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09-03-2010, 12:34 PM
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#13 |
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Registered User
Join Date: Nov 2009
Location: Longview, Texas
Posts: 775
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Re: Pinion Angle
Awesome! Thanks guys for all your help. I guess i have never seen a transition u-joint, LOL.
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09-03-2010, 01:41 PM
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#14 |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Pinion Angle
conversion joint is another term for it. any of the ujoint manufacturers should have a conversion list
ron |
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