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One question about pinion angle. #1025724 07/04/11 01:37 PM 07/04/11 01:37 PM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky OP master
Junky OP master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Transmission is 3 degrees down. Rear yoke is 0 degrees. I need to go 5 degrees down on the rear yoke? No room to raise tranny up. 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: One question about pinion angle. [Re: Junky] #1025725 07/04/11 02:33 PM 07/04/11 02:33 PM
Joined: Jan 2003 Posts: 20,591 Eagle, Idaho Neil The Doctor is in.
Neil The Doctor is in. Joined: Jan 2003 Posts: 20,591 Eagle, Idaho	Found this in the Tech Archives. http://www.moparts.org/Tech/Archive/axle/8.html

Re: One question about pinion angle. [Re: Junky] #1025726 07/04/11 02:38 PM 07/04/11 02:38 PM
Joined: Jan 2003 Posts: 8,016 Polson, MT DoctorDiff master
DoctorDiff master Joined: Jan 2003 Posts: 8,016 Polson, MT	Your current pinion angle is -3 degrees. Why do you want to change it? Contact info

Re: One question about pinion angle. [Re: Neil] #1025727 07/04/11 02:40 PM 07/04/11 02:40 PM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky OP master
Junky OP master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Thanks, but that is confusing. 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: One question about pinion angle. [Re: Junky] #1025728 07/04/11 02:41 PM 07/04/11 02:41 PM
Joined: Apr 2007 Posts: 4,233 petaluma,ca. u.s.a. west master
west master Joined: Apr 2007 Posts: 4,233 petaluma,ca. u.s.a.	so is reversing the angle from -3 to +2 degrees

Re: One question about pinion angle. [Re: DoctorDiff] #1025729 07/04/11 02:43 PM 07/04/11 02:43 PM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky OP master
Junky OP master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	I get a vibration, but only when I'm at about 60 mph or faster. It gets worse if I'm going down a hill at 60 mph and I pick up speed, then let off the throttle a bit to keep from picking up too much speed. Otherwise, not accelerating nor decelerating. It's ok with 3 degrees down on the tranny yoke and 0 degrees at the rear yoke? 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: One question about pinion angle. [Re: Junky] #1025730 07/04/11 02:45 PM 07/04/11 02:45 PM
Joined: Apr 2007 Posts: 4,233 petaluma,ca. u.s.a. west master
west master Joined: Apr 2007 Posts: 4,233 petaluma,ca. u.s.a.	ever had your drive shaft balanced?

Re: One question about pinion angle. [Re: Junky] #1025731 07/04/11 02:52 PM 07/04/11 02:52 PM
Joined: Jan 2003 Posts: 8,016 Polson, MT DoctorDiff master
DoctorDiff master Joined: Jan 2003 Posts: 8,016 Polson, MT	Too much positive pinion angle will cause a vibration on acceleration. Too much negative pinion angle will cause a vibration on braking or deceleration. If your transmission slopes downward 3 degrees toward the rear and your pinion centerline is level, you have a -3 degree pinion angle. I don't usually like to see more than -3 for a street car. Contact info

Re: One question about pinion angle. [Re: west] #1025732 07/04/11 03:05 PM 07/04/11 03:05 PM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky OP master
Junky OP master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Quote: ever had your drive shaft balanced? It's a new drive line. Maybe I should take it back to them and have it rechecked. 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: One question about pinion angle. [Re: DoctorDiff] #1025733 07/04/11 03:06 PM 07/04/11 03:06 PM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky OP master
Junky OP master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Quote: Too much positive pinion angle will cause a vibration on acceleration. Too much negative pinion angle will cause a vibration on braking or deceleration. If your transmission slopes downward 3 degrees toward the rear and your pinion centerline is level, you have a -3 degree pinion angle. I don't usually like to see more than -3 for a street car. I'm gonna find an expert and have them take care of this. It's confusing. 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: One question about pinion angle. [Re: Junky] #1025734 07/04/11 03:09 PM 07/04/11 03:09 PM
Joined: Apr 2007 Posts: 4,233 petaluma,ca. u.s.a. west master
west master Joined: Apr 2007 Posts: 4,233 petaluma,ca. u.s.a.	You can easily put shims between the axle and springs if you want to achieve a zero angle. I found some at an off road shop.

Re: One question about pinion angle. [Re: west] #1025735 07/04/11 06:56 PM 07/04/11 06:56 PM
Joined: Feb 2005 Posts: 5,221 Branson, Mo. J joedust451 super gas
joedust451 super gas J Joined: Feb 2005 Posts: 5,221 Branson, Mo.	So theres no way to lift the tailshaft up any? I had mine at 0 & plenty of lift before it hit the floor, I like setting tailshaft at 0 & then drop the pinion 3* down for -3*, I had mine this way & no vibration that i could tell. 75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU

Re: One question about pinion angle. [Re: Junky] #1025736 07/04/11 10:03 PM 07/04/11 10:03 PM
Joined: Apr 2011 Posts: 13 NY KillerB member
KillerB member Joined: Apr 2011 Posts: 13 NY	Is there any angle shims on leafs? If not, add 2degree down on rear that should fix your vibration under load. But make sure your driveshaft is balanced before anything.

Re: One question about pinion angle. [Re: KillerB] #1025737 07/05/11 02:20 AM 07/05/11 02:20 AM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky OP master
Junky OP master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Quote: Is there any angle shims on leafs? If not, add 2degree down on rear that should fix your vibration under load. But make sure your driveshaft is balanced before anything. I'm going to try it your way. Both balance check and shims. Trial and error on the shims. Not hard to had or subtract them. 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

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