Adjustable Torque Arm Question - Quick Answer
02-03-2015, 01:57 PM
#1
Adjustable Torque Arm Question - Quick Answer
When you adjust your Torque arm back and forth it obviously changes the angle of the rear end. What is the desired angle for the rear end? What does adjusting it each way change in terms of traction, cornering, ect?
Thanks!
Thanks!
02-03-2015, 07:21 PM
#2
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Re: Adjustable Torque Arm Question - Quick Answer
The diff pinion should be at the same angle as the crankshaft centerline. If you want, you can angle it down at the front 2-5* from the crankshaft angle.
If the engine/tranny is down at the back lets say 2* then you want the pinion pointing up about 2* but could be as low as -3*
It has nothing to do with traction, cornering etc. It all has to do with driveline angles and keeping the u-joints happy to reduce vibrations. Angling the pinion down slightly from the crankshaft angle will allow the diff to rotate up slightly while under acceleration to bring the angle back close to the same angle as the crankshaft.
If the engine/tranny is down at the back lets say 2* then you want the pinion pointing up about 2* but could be as low as -3*
It has nothing to do with traction, cornering etc. It all has to do with driveline angles and keeping the u-joints happy to reduce vibrations. Angling the pinion down slightly from the crankshaft angle will allow the diff to rotate up slightly while under acceleration to bring the angle back close to the same angle as the crankshaft.
02-03-2015, 11:41 PM
#3
Re: Adjustable Torque Arm Question - Quick Answer
The diff pinion should be at the same angle as the crankshaft centerline. If you want, you can angle it down at the front 2-5* from the crankshaft angle.
If the engine/tranny is down at the back lets say 2* then you want the pinion pointing up about 2* but could be as low as -3*
It has nothing to do with traction, cornering etc. It all has to do with driveline angles and keeping the u-joints happy to reduce vibrations. Angling the pinion down slightly from the crankshaft angle will allow the diff to rotate up slightly while under acceleration to bring the angle back close to the same angle as the crankshaft.
If the engine/tranny is down at the back lets say 2* then you want the pinion pointing up about 2* but could be as low as -3*
It has nothing to do with traction, cornering etc. It all has to do with driveline angles and keeping the u-joints happy to reduce vibrations. Angling the pinion down slightly from the crankshaft angle will allow the diff to rotate up slightly while under acceleration to bring the angle back close to the same angle as the crankshaft.
Perfect answer. Thanks for your help!
02-04-2015, 07:13 PM
#4
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Adjustable Torque Arm Question - Quick Answer
Just remember, pinion angle has nothing to do with the ground or the driveshaft. 2* down angle may still be pointing upwards. It all depends on the angle that the crankshaft is on.
If the crankshaft is parallel to the ground then the pinion angle can be parallel also or down slightly in the front which would then actually look like it's pointed down.
If the crankshaft is parallel to the ground then the pinion angle can be parallel also or down slightly in the front which would then actually look like it's pointed down.
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