<VV> PG problem

[Dave Ziegler]

on 9/8/04 11:36 PM, Geoffrey Albert Clarke Johnson at geoffj@unm.edu wrote:

> 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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Geoff, this is the second vote for this spring being broken, Harry Yarnell
also said that is the problem. I'll have to check it out.
Thanks guys, Dave.. .
-- 
Dave Ziegler
Corvair Therapy
Mechanical repairs
Minor restoration