MilSpec78
New member
- 54
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- Location
- Saratoga Springs, Utah
Hi guys,
i am just about done with the first phase of my bob project. The axle is mounted and the frame is cut.
While I was measuring the necessary drive shaft length I checked the pinion angle. It appears I have about 4 degrees of positive angle. I am using M105 trailer springs on zero degree 4 inch perches. I also pushed the axle back by about 15 inches.
The truck still needs the bed mounted and the cab extended so it is not yet fully loaded. I suspect the positive pinion angle will improve with more weight on the truck but I do not imagine by much.
i have searched and searched this subject and not found much talk about pinion angle. I would expect this to be a regular topic for those not using front deuce springs and perches.
Am I missing something here? I think the goal should be zero degree pinion angle like the front axle so I am considering shims.
i would love to hear from you who have bobbed your trucks. Did you shim to achieve your desired pinion angle? Is there a reason I should not be concerned with the positive pinion angle?
Thanks for your help.
i am just about done with the first phase of my bob project. The axle is mounted and the frame is cut.
While I was measuring the necessary drive shaft length I checked the pinion angle. It appears I have about 4 degrees of positive angle. I am using M105 trailer springs on zero degree 4 inch perches. I also pushed the axle back by about 15 inches.
The truck still needs the bed mounted and the cab extended so it is not yet fully loaded. I suspect the positive pinion angle will improve with more weight on the truck but I do not imagine by much.
i have searched and searched this subject and not found much talk about pinion angle. I would expect this to be a regular topic for those not using front deuce springs and perches.
Am I missing something here? I think the goal should be zero degree pinion angle like the front axle so I am considering shims.
i would love to hear from you who have bobbed your trucks. Did you shim to achieve your desired pinion angle? Is there a reason I should not be concerned with the positive pinion angle?
Thanks for your help.