Re: Twin Ultramatic Problem

Posted by Ross On 2012/9/8 6:23:57

It's not the load that is the issue, but some internal hydraulic pressures in the trans that respond to how far the throttle is pushed. From what you describe, yours are set too low.

You will need to adjust the throttle linkage to the trans as per the shop manual (page 53, Ultra section)--I believe Howard posted all the latest and best information on that subject.

Further, I find that as the transmissions wear and age, the throttle pressures need to be set higher, that is the little sliding link described in the literature needs to be set slightly further rearward than what is described. You might want to mark your existing location with a bit of tape before you start making adjustments.

Note that on a 56, the rod should be in the middle hole of the three on the lever.