Any of you guys ever change your rear end oil. Am I correct in assuming that the old oil has to be pumped out? I don't see any bolts holding a rear plate like others I've seen.

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Comment by Jimmy Davis on September 30, 2014 at 10:18pm
Thanks guys. I dont know if its ever been changed, but if not, every fifty years seems like the maximum interval for any oil change. lol. Im also having the tranny flushed with a new filter installed. Just made sense to do both at the same time.
Comment by Tony Albarella on September 30, 2014 at 9:46pm

I just did mine after changing out the pinion seal. Yes, the shop manual states that the carrier fluid only needs to be refilled when a leak occurs and the unit is serviced, otherwise it is permanent (of course, they didn't allow for usage half-a-century later). I have a '63 but assume the same applies in '64.

A cheap hand pump works fine for the task. I recommend a small diameter hose - better suction, and it gets in low under the gears. 

Comment by Tony and Ginny 429 on September 28, 2014 at 11:13pm
You can use a hand suction tool for this purpose ,to remove and refill the rear end thru the inspection bolt
Some auto stores will lend you tools
Comment by Russ Austin on September 28, 2014 at 9:50am

Yes, the oil has to be pumped out.  Poor design.

In their defense, Cadillac never built the car to last this long. Quality was on their mind, not longevity.


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