Is it slow to engage from reverse to drive and vice versa? If its not
the valve body it might be the retaining pin in the diff.

In article >,
says...
> After I replaced the Torque Axis Mount and saw no improvement I drained the
> fluid and changed the filter hoping that would solve it, but again, no
> improvement. (The previous fluid and filter had been replaced just about 18
> months and 15K miles ago.) As a last resort, I even tried removing the
> battery cable for 2 minutes to reset the transmission computer. Again, no
> improvement.
>
> At this point I'm researching a Saturn Fans web site that has an unorthodox
> "cure" for the "reverse slam" posted. It involves running the vehicle in
> reverse against a stationary object for 30 minutes to get the fluid hot and
> force it through the clogged valve body. I figure there isn't too much to
> lose at this point, but would like to verify that my symptoms are in fact
> caused by the same fault since nowhere did anyone on that site mention
> clunking when shifting forward gears.
>
> Thanks for the thought. If anyone else can confirm this is the reverse slam
> or provide other thoughts, let me know.
>
> Bob
>
> "Steve" > wrote in message
> ...
> > Have you tried a drain and fill (or two) of the trans fluid? I started
> > having the signs of the valve-body problem (slippage, clunk/hard shift),
> but
> > a drain-and-fill with Mobil Synthetic Trans Fluid fixed the problem for
> > going on 8k miles.
> >
>
>
>