<VV> Powerglide Slipping on Upshift

[Frank DuVal]

A classic mistake. Never change a good working part for an unknown new 
one! New parts are not 100% trouble free, but those road tested ones are 
woking today. Maybe not tomorrow, but today yes. I would definately swap 
the old part back in.

Now, when that does not fix the slip, you will know the new modulator is 
OK.  Did you take the filter off to clean it? Did any parts fall out 
when the pan was off? Did you use the modern equivalent of Dexron to refill?

Frank DuVal

Ken Maxwell wrote:

>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
>
>  
>