Re: Pinion angle
[Re: 440mopar]
#1400794
03/11/13 11:57 AM
03/11/13 11:57 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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You'll have to have the drivetrain installed & the car level & the Dana moved laterally so the wheels are centered equally. On moving the Dana rearward be sure & mockup & check the rear shackles & you want the bottom end of the verticle shackles to point somewhat rearward & with that in mind you can only go so far more to the rear. Then you tack weld the perches to locate them then dissassemble & take out the springs & complete the welding. On the angle you could weld them at the std A body angle for a marketable commodity if you ever resell it & use shims if needed to get the angle right or if the trans is ie 3 deg "UP" then you'd want the Dana 3 deg DOWN plus an additional ~2 deg down as the pinion rises on accelleration so you end up with the trans & the Dana parallel but in different planes. I dont have the final word on the angle situation so wait for others with more knowledge to chime in
live every 24 hour block of time like it's your last day on earth
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Re: Pinion angle
[Re: 440mopar]
#1400795
03/11/13 01:29 PM
03/11/13 01:29 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Personally I'd wait until you have the driveline where you want it, esp if doing a custom install, I'd install the springs,desired tires, ride height, etc, etc...I'd install the axle on the perches in the springs UNWELDED, so that I can rotate the housing/pinion angle to where it's required, then tack weld, remove, finish weld, re-install, keep in mind there are a lot of variables in setting your pinion angle, I'll assume this is street use only?, if so remember the pinion on average rotates upward 2-4 degrees upon acceleration, so you need to factor that in, based on what your final driveline angle is, you want to see at least 1, and 3 degrees max deflection of the u-joints
mike
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Re: Pinion angle
[Re: DAYCLONA]
#1400796
03/11/13 01:38 PM
03/11/13 01:38 PM
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Joined: Aug 2007
Posts: 732 USA
440mopar
OP
super stock
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OP
super stock
Joined: Aug 2007
Posts: 732
USA
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Quote:
I'll assume this is street use only?
Yes it is.
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Re: Pinion angle
[Re: DoctorDiff]
#1400801
03/19/13 01:11 PM
03/19/13 01:11 PM
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Joined: Jan 2003
Posts: 5,186 Wherever I am.
Junky
master
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master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Quote:
Pinion angle is the relationship between the transmission and the pinion, NOT to the driveshaft and NOT to the ground.
Ideally, you want the pinion to become parallel to the transmission as the pinion wraps up a couple degrees under power. This is how a 2-joint driveshaft is designed to operate.
1. Make the pinion parallel to the transmission as a base-line when the vehicle's weight is resting on it's suspension.
2. Roll the pinion downward 2 degrees from this base-line and weld the perches.
The result is a true 2 degree negative pinion angle.
Easy explanation to understand.
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