My mechanic says the downward angle of my pinion has chewed up my driveshaft and will do it again unless we raise it.  Problem is there doesn't seem to be any direct means of adjusting pinion angle on 1963 Cadillac Series 62.  Anyone else go through this?  What was the resolution?

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Comment by David Thomas on May 21, 2015 at 3:28pm

A year or so back, I talked to Driveshaft Specialist aboout building a new shaft or rebuilding one for my car. I never got around to sending them a shaft for a pattern, but they were familiar with the drive shafts in our cars. They have new center supports for our cars.

Comment by Jason Edge on May 21, 2015 at 9:24am

Really good used ones are in short supply. I have heard people say they have had them successfully rebuilt but do not remember the company or location.  I pulled up my June Hemmings and only see one company listed Surge Clutches and Drivelines. For any potential company I would ask for references for rebuilt driveshafts with CV Joints. If they are reputable

Comment by Tony and Ginny 429 on May 20, 2015 at 1:13pm
Do we know of a shop that has rebuild our driveshafts professionally ,any place in the USA ?
I do think that the used good ones will be in limited supply ,if they are not already difficult to acquire
Comment by Lee Martin on May 20, 2015 at 8:38am

Thanks guys for the info.  Driveshaft angle is fine, just pinion angle seems to be a bit low.  The car is on a hoist right now and mechanic agrees that may be exaggerating it somewhat.  Once it's down he'll see how much off it may be.  One this is certain, that is what ground up my driveshaft CV joints to shreds.  Driveshaft is out of county being sawed off and rebuilt from the ground up $$$. 

Dealing with leaky trans lines now.  Ordered new expen$ive ones from OPG, waited 5 weeks for delivery and then found they had incorrect fittings on trans end-screw on type.  Mine is the beaded end type which OPG doesn't even know exists for that car, though shop manual confirms it and local shop carries them for half what OPG does (I learned too late).  So brand new lines being cut and spliced on to rubber hoses with clamps.  Stupid leak-prone design, don't know what Cadillac was thinking.  Thanks again.

Comment by Jason Edge on May 19, 2015 at 9:26pm

If you have the driveshaft out of the car you can check the rear driveshaft section's two rear CV joints that often wears out and causes many problems. Take your hand and manual turn the CV joints outward in a circular manner. They should have a really tight spring action as they turn if they are still good. If they are loose and just sort of flop around they will cause vibration and speed up wear on the pinion seal and center member bearing. Thru 19 years of selling parts I don't know how many times rear end issues have been resolved by replacing with nice tight often low mileage rear drive shaft sections. I had one customer have his rebuilt twice spending upwards of $1000 only to put a good ole used one in to solve the problem. They can be rebuilt but it needs to be done professionally by someone that knows what they are doing.

Comment by David Thomas on May 19, 2015 at 9:13pm

Lee, the pinion is supposed to be pointing at a downward angle, especially if the car is on a lift and the axel is hanging free. Check the bushings on the rear upper yoke and the ball joint that attaches to the axel housing, if they are damaged it could cause some abnormal axel movement. If the rear springs have the car sitting too high, that would also cause the pinion angle to increase. Check the standing height of the rear suspension to be sure it is within factory specification.

 Pinion angle is one reason Cadillac put CV joints on the rear drive shaft section at the differential and center support carrier bearing.

Hope this helps, David

Comment by Kurt on May 19, 2015 at 6:38pm

In addition to my previous comment, shimming is used for fine adjustment of drive line angle. Here is a discussion of that.

Comment by Kurt on May 19, 2015 at 5:46pm

Check the condition of your motor mounts & transmission cushion. If they are in good shape & not collapsed the drive line angle should be correct.


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