Re: Twin Ultramatic Problem

Posted by Ross On 2012/9/8 19:08:51

Thanks for info Tim. As these things wear, thicker is better up to a point.

As you know, the most common (first)complaint with with these things is a weak direct clutch. In my experience this is most often due to excess clearance between the input shaft and the front pump bushing. A little thicker oil by means of chemistry or by just keeping it cooler will make a dodgy trans good for quite a while.

I agree, the Lucas is just a thick oil with perhaps a dose of friction modifiers; that being said, it has granted a reprieve to several transmissions I've tried it on. It will however not raise the dead!