Pinion Angle?
Thread Starter
Team Owner
Joined: Apr 2000
Posts: 27,818
Likes: 8
From: CT
Pinion Angle?
A friend of mine converted to a Dana 44,and asked if there is a pinion angle related to the 44 conversion... I guess the way the tranny mounts up to the torque tube? Angle there. I have no clue on this...and if there we're one,and it we're in-correct, what would the symptoms be?
Thanks in advance.
JD
Thanks in advance.
JD
Burning Brakes
Joined: May 2000
Posts: 1,181
Likes: 0
From: Puyallup Washington
Re: Pinion Angle? (JD 90 383)
The pinion angle is built into the "C" beam mounts, it will not change as the pinion does not move up and down like a solid axle car. It will not be a problem.
Melting Slicks
Joined: Jun 2001
Posts: 2,525
Likes: 1
From: Sarasota, FL
Re: Pinion Angle? (JD 90 383)
Yup pinion angle on a Vette rear is defined by the torque arm. On a lifted truck sometimes the axle is cut and the pumpkin turned so that the pinion is pointed up more so that there are no severe angles in the driveline. If yer pinion angle is outta whack on a Vette you have more serious thinkgs to worry about and/or repair.
Bob
Bob
Intermediate
Joined: Jan 2000
Posts: 46
Likes: 1
From: Bismarck, ND, USA
Re: Pinion Angle? (BobMachus)
The Vette is preset by the torque arm. On vehicles with a live axle, the rear angle (differential) and front angle (transmission) should be equal but opposite to cancel out "wobble" or velocity gyrations beyond either end of the driveshaft. Constant velocity joints help prevent this requirement.
On ordinary double u-joint halfshafts (no constant velocity joints), independent axle angles should be always equal but opposite to cancel out the same "wobble". The angles usually are very close to equal unless there is major wear or misadjustment.
If this "wobble" or velocity acceleration/deceleration were not constantly present to some degree then huge driveshaft angles would not ever be the problem they are. At great angles the shaft begins to have quite a noticeable speed-up/slow-down flywheel effect. At low angles, it's there...but it's not very noticeable. If the angles are not the same then the motor and wheels must run (vibrate) at slightly different speeds per revolution because of lack of proper cancellation.
Wes
On ordinary double u-joint halfshafts (no constant velocity joints), independent axle angles should be always equal but opposite to cancel out the same "wobble". The angles usually are very close to equal unless there is major wear or misadjustment.
If this "wobble" or velocity acceleration/deceleration were not constantly present to some degree then huge driveshaft angles would not ever be the problem they are. At great angles the shaft begins to have quite a noticeable speed-up/slow-down flywheel effect. At low angles, it's there...but it's not very noticeable. If the angles are not the same then the motor and wheels must run (vibrate) at slightly different speeds per revolution because of lack of proper cancellation.
Wes
Intermediate
Joined: Jan 2000
Posts: 46
Likes: 1
From: Bismarck, ND, USA
Re: Pinion Angle? (BobMachus)
The Vette is preset by the torque arm. On vehicles with a live axle, the rear angle (differential) and front angle (transmission) should be equal but opposite to cancel out "wobble" or velocity gyrations beyond either end of the driveshaft. Constant velocity joints help prevent this requirement.
On ordinary double u-joint halfshafts (no constant velocity joints), independent axle angles should be always equal but opposite to cancel out the same "wobble". The angles usually are very close to equal unless there is major wear or misadjustment.
If this "wobble" or velocity acceleration/deceleration were not constantly present to some degree then huge driveshaft angles would not ever be the problem they are. At great angles the shaft begins to have quite a noticeable speed-up/slow-down flywheel effect. At low angles, it's there...but it's not very noticeable. If the angles are not the same then the motor and wheels must run (vibrate) at slightly different speeds per revolution because of lack of proper cancellation.
Wes
On ordinary double u-joint halfshafts (no constant velocity joints), independent axle angles should be always equal but opposite to cancel out the same "wobble". The angles usually are very close to equal unless there is major wear or misadjustment.
If this "wobble" or velocity acceleration/deceleration were not constantly present to some degree then huge driveshaft angles would not ever be the problem they are. At great angles the shaft begins to have quite a noticeable speed-up/slow-down flywheel effect. At low angles, it's there...but it's not very noticeable. If the angles are not the same then the motor and wheels must run (vibrate) at slightly different speeds per revolution because of lack of proper cancellation.
Wes
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: Pinion Angle? (Wes Tausend)
Basically...the torque arm will allow some angle in the drive shaft just due to slop in it's mount points before tightening. The trick is to make the driveshaft align as straight as you can to the different....since neither the trans or differential are 'supposed' to move, the U-joint's should be straight in line...therefore minimizing joint wear.
