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#1061992 - 05/22/19 08:38 AM Pinion angle  
Joined: Apr 2001
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345HP87SSAC Offline
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345HP87SSAC  Offline
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Stanberry, MO
Those with aftermarket rears what are you setting the pinion angle at? I need to do that on my aerobafter the rear swap.


[Linked Image]
New BTR Stage 4 cam makes 449 HP and 380 TQ TQ at the wheels. 6.0 LY6 VVT and 4L85E!blackgoldaero http://www.cardomain.com/ride/671193
#1061993 - 05/22/19 01:03 PM Re: Pinion angle [Re: 345HP87SSAC]  
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SSLance Online content
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SSLance  Online Content
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Peoria, AZ
Set it parallel to the trans output shaft. My trans is 3.5 degrees down so my pinion is 3.5 degrees up.


Lance
1985 Monte Carlo SS Street Car
#1062001 - 05/22/19 11:48 PM Re: Pinion angle [Re: 345HP87SSAC]  
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345HP87SSAC Offline
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345HP87SSAC  Offline
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Stanberry, MO
Thanks Lance! 3 degrees was coming to mind. I don't have a gauge, but I will figure it out.


[Linked Image]
New BTR Stage 4 cam makes 449 HP and 380 TQ TQ at the wheels. 6.0 LY6 VVT and 4L85E!blackgoldaero http://www.cardomain.com/ride/671193
#1062006 - 05/23/19 03:18 AM Re: Pinion angle [Re: 345HP87SSAC]  
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MC96 Offline
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St. Johns MI
Iphones have a level in either the compass or measurements app depending on what iOS you have


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
#1062012 - 05/23/19 04:15 PM Re: Pinion angle [Re: 345HP87SSAC]  
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SSLance Online content
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SSLance  Online Content
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Joined: Dec 2007
Posts: 6,549
Peoria, AZ
Harbor Freight has a nice digital one for like $10-15


Lance
1985 Monte Carlo SS Street Car
#1062015 - 05/23/19 07:28 PM Re: Pinion angle [Re: 345HP87SSAC]  
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345HP87SSAC Offline
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345HP87SSAC  Offline
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Stanberry, MO
Harbor freight here I come. If not I will try my phone! It is an I8.


[Linked Image]
New BTR Stage 4 cam makes 449 HP and 380 TQ TQ at the wheels. 6.0 LY6 VVT and 4L85E!blackgoldaero http://www.cardomain.com/ride/671193
#1062021 - 05/24/19 04:03 PM Re: Pinion angle [Re: 345HP87SSAC]  
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FrankOC Offline
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Cape Cod, MA
Tremec Tool Box in Apple app store


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#1062071 - 05/29/19 03:03 AM Re: Pinion angle [Re: FrankOC]  
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mrengineer Offline
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The D, MI
That is a great app. Driveline angle finder, vehicle speed, RPM, and tire size calculator as well. Driveline angle is easy to use and accurate.


Mr. Engineer
#1062115 - 06/01/19 07:41 PM Re: Pinion angle [Re: 345HP87SSAC]  
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MAP Offline
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MAP  Offline
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Yuma, AZ
Hi Folks,

About the pinion angle, please remember that it varies as a function of suspension loading, and as a function of the torsional compliance created by the suspension bushings reacting to the driveshaft torque. Since you have no choice but to use a single setting, try to optimize for an average loading condition for which you want to minimize vibration.

HTH,
MAP


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