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shifting to reverse


 
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bogdanbutur
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Joined: 29 Mar 2006

PostPosted: Tue Aug 29, 2006 12:42 pm    Post subject: shifting to reverse Reply with quote

when i put my 00 in reverse the whole car jolts/jerks, and there is a loud "smash" noise comming from the transfer case area. is it because it is such a low range gear ? or what ? the dealer said it was normal, but i highly doubt their oppinion.
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nixt
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Joined: 17 Aug 2005
Location: Atlanta/Athens, Georgia

PostPosted: Tue Aug 29, 2006 4:37 pm    Post subject: Reply with quote

I've never had that problem in my Grand Cherokee, but I had a similar problem when I had a Chevy Blazer. I didn't notice it when I shifted from "park" to "drive" but it was very noticeable when I would shift into reverse (I don't know why reverse was more noticeable than other gears). If you lightly applied the throttle right after putting it into reverse and started to creep back slowly, the whole vehicle would shake and there would be a rattling noise (I never noticed a "smash" noise though). I don't know where the noise was coming from, but it sounded like the whole powertrain was struggling. I took it to the dealership to get this fixed and they simply changed the fluid in the rear differential and the problem went away. I had been a little bit lax on having my truck serviced at the proper intervals. It was a long time ago so I don't remember if they changed the fluid in the front diff or the other parts of the drivetrain (tranny, transfer case, etc...) but they said the problem could be traced back to the rear diff, and it was much more noticeable in 2wd as opposed to 4wd. I do recall that they said that this was more noticeable in vehicles with limited slip differentials than without because if you don't change the fluid at proper intervals the limited slip will become an unlimited slip as the lubricant breaks down.
-nixt
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