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Pontiac Aztek Noises and Sounds

72 messages,  Last post on Sep 01, 2009 at 6:49 AM

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#71 of 72 Rear differential by mrssteacy Jul 25, 2009 (8:33 am)
We have been hearing a grinding noise for some time. It is not the bearings though the sound is similar to when we had to replace bearings previously. (Bearings are tight.) Think it might be the rear differential needs fluid. Parts store says that is a GM "part" not available except through dealers. Is that true? If not, how do I tell what fluid it needs, and where would that be available? Thanks!
#72 of 72 01 AWD Aztek-Transmission noises by dumtekluvr Sep 01, 2009 (6:49 am)
We are love trouble so we have recently acquired a second Aztek (after our first one blew its motor a few yrs back). The dealer said everything was fine but that was a lie. Anyway the most major problem is the transmission. About two months ago I thought we lost the transmission altogether. I had been on the hwy doing about 70 mph and it was just shifting horribly hard. Then once I reached my destination the check engine light came on and when I hit the gas there was a horrendous grinding sound. When I got ready to leave the place I took the Aztek to a nearby repair shop, after running the codes they said it was the transmission and to get it to a transmission place ASAP. On the 30 mile drive back home it was fine!! I took it to the repair place anyway and after having it for 2 days they found nothing, They said to just keep driving it until something goes wrong. I've been cautious to drive it too far but ever since then it has acted fine. That was up until this weekend, now it back to shifting roughly (though not every time I drive it). Today was the worst, when accelerating at each shift the car would lurch and then there was a knocking type noise (not an engine knocking). It felt like it was lurching forward and then kicking back. Any ideas on what this could be? I hate to keep driving it if at any moment I am going to lose my transmission. Any suggestion would be great (ok any suggestion other than to get rid of the car )

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