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Pinion Angle

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Old Jul 18, 2007 | 12:18 AM
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Default Pinion Angle

Hey everyone Im lowering a 90 Ram and was wondering what should i set the pinion angle at?? I have read alot of the lowering posts on here but cant find out what degree i should put it at. Im putting the rearend ontop of the springs with new perches.

Thanks ******
 
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Old Jul 18, 2007 | 03:02 AM
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Default RE: Pinion Angle

Ideal is at the same angle as the trans output shaft that way both front and rear u joints are working at the same angle and will run smoother.
 
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Old Jul 18, 2007 | 03:21 PM
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Default RE: Pinion Angle

Dont mean to sound dumb but how do i find the angle at the trans?? ive got an angle finder but where do i put it on the trans? o and thanks for the reply!

thanks ******
 
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Old Jul 18, 2007 | 03:52 PM
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Default RE: Pinion Angle

most usally the pan mounting surface is parralel to the shaft.

The angles shown are just for referance to show how the front and rear angles should match.

[IMG]local://upfiles/56817/FC072CC867524753A3475C237FB665DB.gif[/IMG]
 
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Old Jul 18, 2007 | 10:28 PM
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Default RE: Pinion Angle

Thanks alot that really helped me out. Im hopin to have it done by sat. I should be postin pics soon!!
 
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Old Jul 19, 2007 | 12:21 AM
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Glad I could help.
 
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Old Jul 19, 2007 | 06:10 AM
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Default RE: Pinion Angle

In case it is of any help
this 1998 TSB has a little on driveline angles:

http://dodgeram.info/tsb/1998/18-49-98.htm

note this section:

DRIVELINE ANGLE DIAGNOSIS Driveline Angle surge/vibration starts to occur at approximately 20 mph (32 kph) and starts to disappear at approx 60 mph (97 kph) and is torque sensitive. If using the EVA, driveline surge/vibration will have a vibration frequency of approx 24 - 84 Hz. Refer to the 1999 Ram Truck Service Manual page 3-3 for propeller shaft and u-joint driveline vibration diagnosis. The driveline angle must be measured. Follow the service procedures from pages 3-4 through 3-6. All measurements must be taken at curb weight with the vehicle supported by its wheels/tires. Normal joint angles for the Ram Truck 4X4 are 1-5 deg with a maximum of 1 deg difference between joints in a series. Driveline angles that exceed the 1 deg maximum difference must have the axle shimmed."
 
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Old Jul 19, 2007 | 05:05 PM
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ORIGINAL: HankL

In case it is of any help
this 1998 TSB has a little on driveline angles:

http://dodgeram.info/tsb/1998/18-49-98.htm

note this section:

DRIVELINE ANGLE DIAGNOSIS Driveline Angle surge/vibration starts to occur at approximately 20 mph (32 kph) and starts to disappear at approx 60 mph (97 kph) and is torque sensitive. If using the EVA, driveline surge/vibration will have a vibration frequency of approx 24 - 84 Hz. Refer to the 1999 Ram Truck Service Manual page 3-3 for propeller shaft and u-joint driveline vibration diagnosis. The driveline angle must be measured. Follow the service procedures from pages 3-4 through 3-6. All measurements must be taken at curb weight with the vehicle supported by its wheels/tires. Normal joint angles for the Ram Truck 4X4 are 1-5 deg with a maximum of 1 deg difference between joints in a series. Driveline angles that exceed the 1 deg maximum difference must have the axle shimmed."
Readers Digest version "Angles must be the same front and rear"
 
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Old Sep 29, 2007 | 04:29 PM
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Default RE: Pinion Angle

this may help you!






more info - http://www.4xshaft.com/techinfo.html
 
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