<VV> CLUNK IN POWERGLIDE

[N2VZD at aol.com]

if it has been slammed into gear a lot , or done the quick back and forth  
between reverse and drive , there are 2 VERY small buttons on the rear pump 
that  due all the work of moving the car.  they plow a large grove in the 
part  they drive , then shear off. also the main input shaft has a small die 
cast star  as a drive. either one can wear and cause a clunk.  if engine idle 
is too  fast it is hard on those parts also. if you study a picture of the 
internals of  a powerglide , or better yet tear one down , you will probably 
pay more  attention to how you treat them?  amazing how tough they are for 
how simple  the guts are. another cause (start here!) can be  the modulator  
, or  the dreaded "E" clip in the throttle body.  the E clip job can be 
done  without taking the tranny apart , but i would say it oughta have the kit 
put in  it. (tear it down ) if you want best reliability. check for vacuum  
to  modulator also.
regards, tim colson.