'90 Buick Reatta bangs into reverse

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  #1  
Old 11-18-10, 06:03 PM
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'90 Buick Reatta bangs into reverse

It has 120,000 miles and when you put it in reverse you feel and hear a bang. It doesn't do it when you put it in drive and it doesn't seem as bad when cold. I haven't checked for worn motor mounts or drive axles but since it doesn't happen in drive they should be OK. What else can I check?
 
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Old 11-19-10, 11:18 AM
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(Quote) and it doesn't seem as bad when cold.

When what is cold
ambient temperature???? (fall winter)
or transaxle???? (that hasnít warmed up yet)


Basically speaking this is what needs to be addressed.

Please read carefully, so you can answer correctly.


If you shift into reverse, and the millisecond you shift it bangs, then you have to rule out:

Failed motor (and or transaxle mounts).

On the other hand
if you shift into reverse
and hear or feel the
engine rev, but the
transaxle doesnít shift
until a second or more
later, then you most
likely have a mechanical
or electronic issue.
clarify and get
back to us.
 
  #3  
Old 11-19-10, 05:21 PM
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Cold as when the engine is first started in the morning. And it bangs right when you put in reverse, no lag or engine rev.
 
  #4  
Old 11-19-10, 05:53 PM
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I haven't checked for worn motor mounts or drive axles but since it doesn't happen in drive they should be OK.
Absotively ..Posolutely.....UNTRUE....

Drive and reverse twist the engine in opposite directions....It is completely feasible that one is broken, and the opposing one is intact.

If you can rule out external components, Backlash in tthe differential section is quite common , as is stretched "Drive Chain".
 
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