Rear axle pinion angle question -
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post #1 of 3 Old 10-13-2013, 05:33 PM Thread Starter
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1988 MJ Comanche 
Join Date: May 2008
Location: Independence
Posts: 195
Rear axle pinion angle question

I am looking for information on setting my pinion angle for my rear axle.
88 shortbed 4x4.
6 inch schackles
Spring over on a 1996 Ford 8.8
On front; Rusty's 8 inch long arm with G2 front axle.

I am hearing two different stories;
one, the pinion angle needs to be set ONLY for this Ford axle- i.e.. set to a specific angle for lube to get to the pinion bearings.
two, the angle is set per the amount of lift and splitting the angles which both u-joints are in to minimize vibration.

I am confused as to what I need to do to to minimize lube issues and/or vibration issues when considering getting the perches welded in place.

Any information on what I need to consider before I move on with this would be great.

Thank you!

dkroll is offline  
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post #2 of 3 Old 10-21-2013, 11:05 PM
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1984 J-Series Truck 
Join Date: Nov 2004
Posts: 3,214
If the trans is parallel, then the pinion gear needs to be parallel too. 2 different angles cause vibe issues. I did SOA rear with Metric Tonne springs and the D35 so far. If I changed anything, I would tilt the pinion at the tcase and go with a double cardan (double Ujoint) shaft. Cardan goes to the trans end. Might require a high angle shaft. Mine has been fine for 3 years level to level with new joints (old joints will self destruct in no time)

"Usually found in a Jeep near Reiter, WA"

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'81 Eagle wagon with upgrades $2500
'87 Comanche shortbox 4.0/AW4/NP242 on 33" tires $3500
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post #3 of 3 Old 10-23-2013, 05:24 PM Thread Starter
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1988 MJ Comanche 
Join Date: May 2008
Location: Independence
Posts: 195
Thank you.

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