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1991 SAAB 900 Transmission heavy clunking

Tiny
SCOTTPOMBA
  • MEMBER
  • 1991 SAAB 900
  • 2.1L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 122,000 MILES
Scotty,

When I do rapid acceleration/holding brakes and press gas to high rotations/achieve speed of 30km/h then car make heavy clunking from the transmission. When I decrease speed, it stops.
No bad sounds without shafts/weight.

- Reverse gear - slightly slipping
+ CV joints - all good
+ CV inner joint socket - all good (doesnt rattle)

What could it be?
Thanks.
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Thursday, August 28th, 2014 AT 11:30 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have a trans guy look at it it maybe a joint on axles cdoing that or trans problem
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Friday, August 29th, 2014 AT 6:59 AM
Tiny
SCOTTPOMBA
  • MEMBER
  • 2 POSTS
As said, all joints on axles are good. Its definetly a transmission problem, the question is, what is it and can I fix it.
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Saturday, August 30th, 2014 AT 4:09 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I fyou really think you can rebuild an automatic transmission then have at it. Clunking is usually not associated with trans problems however if it is and you are very sure of it be prepared to spend lots of money as it is probably a planetary gear set gone out and or the drive axle setup inside. I have no idea of your capabilities of mechanical repair.
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Saturday, August 30th, 2014 AT 5:52 AM

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