What should pinion angle be set at?
According to Currie, the average car crafter should strive for between 1 and 3 degrees between the tailshaft of the transmission and driveshaft, and 1 to 3 degrees between the driveshaft and pinion. Furthermore, the two angles should be nearly equal (between 1 and 3 degrees), but always opposite (see crude diagram).
What is the best pinion angle for drag racing?
We want the two working angles to be within a half-degree of each other and as slight an angle as possible, less than three degrees is normally recommended in drag racing.
Should pinion angle be positive or negative?
A typical leaf spring rear suspension needs, roughly, 5-7 degrees of negative angle (pinion pointing down). You never want the pinion setup with a positive pinion angle (pointing up). This can lead to binding of the u-joints as the suspension reacts, and will hurt traction.
How do you know if pinion angle is off?
So what symptoms would lead you to identifying bad pinion angle? Drive train vibration at speed, wheel hop and universal joint fatigue/failure are all good indicators. These things can come out of no where with suspension bushing failures, engine and transmission mount failures or even leaf spring fatigue and wrap.
How much driveline angle is too much?
Ideally, both driveshaft-operating angles will be 1 to 3 degrees. Anything over 3 degrees at the rear axle will shorten your universal joint’s life and could create vibration. If your angle is larger than 3 degrees, you must make sure not to exceed max driveshaft RPM as shown on this Spicer table.
What happens if you have the wrong pinion angle?
Does pinion angle cause vibration?
In your case, it appears that the pinion is operating at an intersecting angle to the driveshaft. This will cause a vibration at speed. The reason adding weight with a passenger affects the vibration is that the intersecting angle has improved, but not eliminated, the problem.
What should the pinion angle be on a Cobra IRS?
EXAMPLE: If the front angle reading is +2 degrees (92 on the angle finder), then the rear pinion angle must read -2 degrees (88 degrees on the angle finder). Baseline for a Cobra IRS without purchasing the FR 1401 Delrin isolated rear diff lowering mount, is raising the front of the diff as high as you can get it without it hitting the subframe.
What should the front and rear pinion angles be?
Take the angle reading and compare it to the reading that you recorded earlier for the front. The driveshaft angles must offset each other. EXAMPLE: If the front angle reading is +2 degrees (92 on the angle finder), then the rear pinion angle must read -2 degrees (88 degrees on the angle finder).
How do you change the pinion angle on a radius rod?
Pinion angle can be changed on radius rod style suspensions by adjusting their length causing the pinion to rotate up or down. Inserting shims underneath the transmission mount changing the centerline in relation to the rear differential raised the rear of this transmission.
How does Gary Dagel set the pinion angle?
Gary Dagel has tacked some tubing between the rear end housing to establish clearance with the frame at ride height. He is verifying the height of the vehicle when the rear wheels and tires are installed. Pinion angle still cannot be set yet until the engine and transmission are installed.