🚀 go-pugleaf

> 
>   The automatic transmission of my '77 Plymouth Volare is producing a 
> heavy thump when shifted from Neutral to either Reverse or Drive.
> The harshness of the transmission engagement is roughly proportional to
> the idling speed. The thump can jolt the car at cold idle speed (1400 rpm),
> but is tolerable at hot idle (700 rpm). The level and quality of the 
> transmission fluid has been checked out fine, the idle speeds are 
> also alright.  Other than the stated problem the trasmission works fine
> (no delay, no slippage). I would appreciate any pointer
> to the probable cause of the problem. Thanks.
> 
> 
> Kaihu Chen
> {ihnp4,vonvex,pur-ee}!uiucdcs!chen

The problem may be elsewhere in the driveline.  Worn U-joints on your driveshaft, 
a worn differential, etc. may cause a clunk when the transmission is engaged 
from neutral or park into drive or reverse.  
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Earle A. Sugar
Disclaimer:"I doubt anyone else here agrees with me."
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