Re: trans troubles

Posted by Tim Cole On 2015/10/14 15:50:26

The manual on-line here lists a valving problem and a torque converter valve problem.

There was also a TSB for "runaway shift" between lo and high which called for deletion of an accumulator spring.

As well there are after market springs to improve Lo-Hi shift quality.

However, the first step is to check the throttle valve linkage. I found that even a slight misadjustment can prevent direct drive engagement. So download all the service literature and TSB's for Ultramatic. There is a revision for the throttle valve linkage adjustment in the TSB's as well.

I would start by working within the Left D quadrant (Torque convert start or High Range) to address the lockout clutch problem.

That fact that it does engage indicates an adjustment or valving issue.