engine rattles

1999 GMC JIMMY
145,000 MILES
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SWEETHOPE ALABAMA
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1999 gmc jimmy engine rattles when placed in drive or reverse. Runs fine when cold until idle changes. does not rattle in idle. The rattle seems to be coming from the front of the engine but does not occur when in park. Also, has an exhaust leak or noise coming from tailpipe. Almost like a backfire.
Mar 10, 2012 at 6:50 PM
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RASMATAZ
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It sound like it could be the flexplate that is broken.
Mar 10, 2012 at 6:56 PM
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SWEETHOPE ALABAMA
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Thanks for the advice, I looked at the flexplate and I can see cracks. Do I need to pull the trans to change it?
Mar 10, 2012 at 11:36 PM
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RASMATAZ
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Yes you do, have fun!
Mar 10, 2012 at 11:48 PM