1991 SAAB 900 Transmission heavy clunking

1991 SAAB 900
122,000 MILES • 2.1L • 4 CYL • FWD • AUTOMATIC
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SCOTTPOMBA
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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.
Aug 28, 2014 at 11:30 PM
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HMAC300
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have a trans guy look at it it maybe a joint on axles cdoing that or trans problem
Aug 29, 2014 at 6:59 AM
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SCOTTPOMBA
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as said, all joints on axles are good. Its definetly a transmission problem, the question is, what is it and can i fix it.
Aug 30, 2014 at 4:09 AM
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HMAC300
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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.
Aug 30, 2014 at 5:52 AM