<VV> PG problem

[Geoffrey Albert Clarke Johnson]

Had this a while back on a friends car.  Got the correct answer here.  The 
cushion spring on the low band apply piston is broken.  Sure enough dropped 
the valve body and that was it.  New one and car drives as good as new. 
Replace or check this when it was apart?  It is the inner spring not the 
outer spring so it has to be checked carefully... take the low piston apart 
and check!

Hope that helps!
Geoff Johnson

--On Wednesday, September 8, 2004 5:30 PM -0400 Dave Ziegler 
<dziegler3@comcast.net> wrote:

> Help1 I'm stumped and need some help with a powerglide problem.
> The car: 1965 4-dr 110 H.P., automatic transmission
> The problem: when shifted from neutral to drive, it bangs hard into gear.
> What I've done: replaced the modulator (twice) made sure the valve was
> free. No difference. Made sure ALL vacuum lines were tight(no leaks). No
> difference. Replaced transmission crossmember mounts. No Difference.
> Reading a post by Steve Oxford of last April, he solved the same problem
> by changing the torque converter. I don't understand why but I went ahead
> and changed the torque converter. While apart I discovered the
> differential mounting flange was broken from the starter hole to the
> bottom. I also replaced the differential. No difference. Now grasping at
> straws, I removed the pan and removed the valve body. The valve body was
> dis-assembled on the bench and thoroughly cleaned. I made sure all the
> valves moved freely. It was  then re-assembled and re-installed with new
> gaskets, fresh Dextron, Throttle valve adjusted, low band adjusted. No
> difference. Car still bangs into drive, reverse seems to be okay. After
> running for a few minutes and shifting through the gears, the shift got
> progressively better until it didn't bang going into drive. I thought I
> had it. After sitting for another few minutes, running, no shifting, I
> put it in drive--BANG
> What am I missing or am I just stupid? What's going on here? Anyone have
> any ideas or suggestions? I'll take any or all the help I can get here.
> Thanks in advance,
> --
> Dave Ziegler
> Corvair Therapy
> Mechanical repairs
> Minor restoration
> Dave.. .
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