Try adding a pint of Ford type "F" fluid. But remember the "don't overfill" caveat, so drain some out if you need to. Type "F" fluid uses different friction modifiers from Dexron/Mercon, and can help in situations like this. This trick is much used in street racing circles, to tighten up and quicken shifts.

David Yates <dyates1@BIGPOND.NET.AU> wrote:  I am currently waiting for delivery (from the US) of rebuild parts for my
Auto trans - an '86 T3.

TODAY I have a big problem and I am wondering whether I have some
alternatives.

There has clearly been a problem with the trans for a while. A week ago I
noticed that it would wait until the engine was hot (and hence the AT fluid
was hot - as the cooler I use is part of the radiator) before the trans
would change from 1 to 2 or 2 to 3rd gear. I could live with that.

Today whilst this was the case, there is now a substantial slippage between
gears. I need to keep the thing going (my daily driver) for a few more
weeks.

Is there any fluid I could try to increase friction in the Transmission? I
suspect my major problem is worn clutches and a worn band. That the thing
has been so sensitive to temperature recently suggests a change in oil
viscosity MIGHT help.

Any one have any suggestions or ideas . please?

Thanks

Dave