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post #1 of (permalink) Old 03-21-2000, 09:38 PM Thread Starter
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Axle Degree

I am running a spoa lift. When we did the lift we turned my axles up about 13 degrees.(I didn't know at the time it was a bad idea). To make a long story short my pinion bearing went out in just 9 months due to lack of oil reaching it and now I need a new 3rd member. What is the most you can rotate your axle to compensate for the lift? I am guessing about 6 degrees?

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post #2 of (permalink) Old 03-22-2000, 01:00 AM
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Re: Axle Degree

somewhere it is wrote,,,,(I think a year back issue of "Off-Road")

"keep the same angle on your drive shafts, from your t-case to the axle up to 19 degrees"

if you have the driveshaft coming out of the t-case at (x) degrees and the driveshaft enters the axle at a straight angle or less than what the t-case angle is, you will be putting more stress on the u-joints.

whatchathink?

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post #3 of (permalink) Old 03-22-2000, 02:33 AM
 
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Re: Axle Degree

As long as your axle is rotated up you might consider going to a CV type
drive shaft.For this type of U-joint the axle flange should point straight at
the T-case flange.If your pinion bearing looks like it burned up from lack of
oil you could compensate by over filling the axle.
There's a good article on drive train geometry on Tom Wood's web page.
www.4xshaft.com


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post #4 of (permalink) Old 03-22-2000, 08:49 PM Thread Starter
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Re: Axle Degree

I plan on installing a locker while I have everything apart. Would overfilling the axle with oil to compensate for the severe angle be a safe thing to do? Has anyone else done it? How much extra oil did you put in? It would be alot easier than rewelding everything thats for sure. I really don't want it to burn up again and lose a $200 locker. Thanks- Ryan


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post #5 of (permalink) Old 03-22-2000, 10:19 PM
 
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Re: Axle Degree

I got the idea of overfilling the axle from Tom Woods website under "tech info",check it out.One way to calculate the additional oil required would be
to jack up the back of your rig until the bottom of the filler plug is level
with the bottom of the pinion bearing and then fill the axle with oil.You should
first examine a stock axle to get an idea of where the oil level comes to in
relation to the pinion bearing.I don't think over filling will hurt anything as
long as your axle shaft seals are in good shape.
I recently received a rear axle from Trail Tough.The spring pads have been
rotated 10 degrees to accomodate a CV drive shaft.I asked Brent if I would need
to overfill with oil and he said no.I hope he is right.


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post #6 of (permalink) Old 03-25-2000, 12:10 PM
 
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Re: Axle Degree

If you must turn your axle up and raise the fluid level, why not drill and tap a new plug hole at your corrected level?

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post #7 of (permalink) Old 03-25-2000, 05:03 PM
 
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Re: Axle Degree

Good idea Shawn.You'd have to weld a steel ring to the diff housing because
the metal isn't thick enough to support a threaded plug.


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