Re: Shifting from "low" to "high"

Posted by BH On 2010/9/15 13:24:36

Bob -

You wrote that...

Quote:
Yet, the Ultramatic Drive Serviceman's Training Booklet describes just that - in Part V, Sequence of Operation - on page 24.

That leads me to believe that the original intent was to allow the driver to upshift, manually, when low was no longer needed. Just because you might need to start out in low, you wouldn't want to stay there for the entire trip. Surely, the engineers didn't expect the driver to stop at the top of the hill and then shift to high. Yet, it seems that the engineers didn't anticipate just how often drivers would be upshifting.

Still, in view of the many articles and bulletins concerning premature failure of the high range clutches, which can be found through our Service Index, I do agree that the practice of shifting from low to high should be kept to a minimum.

BTW, here's a direct link to an article on the kit that HH56 mentioned:

Transmission Throttle Valve and Timing Valve Kit

...but readers should also follow this link to an addendum to the subject:

Transmission Timing Valve Timing Pin