<VV> Powerglide Slipping on Upshift

[Lon Wall]

   You said the fluid level was ok "when warm" - I assume you also meant 
with the engine idling in neutral. If not, then you will get an 
articially high fluid level reading.
Low fluid level can cause the slipping. While I'm not here to defnd my 
competitor, the vac modulator should have nothing to do with it. Lon

www.corvairunderground.com


shortle wrote:

>Ken,
>Although I am not a Corvair expert I feel qualified to share some thoughts. 
>First off, if you did not have this issue before you worked on it you should certainly double check your work. What kind of oil did you put back into trans?
>Hoses to modulator (both) are in good order and properly attatched? Did you fiddle with anything else? Adjustments? Anything?
>If all is well, I would certainly try the old modulator (known good) and see what the outcome is. By the way, you did fix something that was broke. You stated the pan was leaking a little.
>I wish you good luck.
>Timothy Shortle in Durango Colorado.
>
>-----Original Message-----
>  
>
>>From: Ken Maxwell <kobramax at insightbb.com>
>>Sent: Nov 26, 2007 4:16 PM
>>To: Virtual Vairs <virtualvairs at corvair.org>
>>Subject: <VV> Powerglide Slipping on Upshift
>>
>>Hi Corvair Experts!
>>
>>
>>
>>I made the classic mistake of fixing something that wasn't broke. The trans
>>pan on my 69 500 95 HP PG coupe was leaking a little so I decided to replace
>>the gasket. I did so without any problem and I noticed that the vacuum
>>modulator valve looked like it had been salvaged from the Titanic so I
>>replaced it with one of Clark's repos. After all this, the previously slick
>>shifting PG now slips on the upshift (it revs a little before engaging
>>high). I checked the fluid and found that I had overfilled it by about a
>>pint, so I drained the fluid so it's now at the proper level when warm. It
>>still slips. I am thinking about digging the Titanic modulator out of the
>>garbage can and reinstalling it. Any other ideas? 
>>
>>
>>
>>Thanks!
>>
>>
>>
>>Ken Maxwell
>>
>>Louisville, KY
>>
>>69 500 Coupe
>>
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