Allison 3000 transmission fluid change ?

I did our first change at 50k. Sent the oil on for sampling and they recommended a more frequent service so did the next one at 80k and readings were good. Also switched to the Transynd. (sp?)

supercub wrote:

wolfe10 wrote:
Yup, major determinant is whether you have Dexron or Transynd/other approved synthetic fluid.

I have NON synthetic

In mine (and many others) opinion, it would behoove you to make the change-over to Transynd. It's a tad costly to do it in the onset but, the change interval frequency is seriously extended. And, as I understand it, Transynd runs cooler. I don't have scientific proof but, never the less, it been in ours for about 5 years now and, that trans is/does perform(ing) flawlessly. The folks at Allison say that two complete drains and one filter change is all that's needed to facilitate the changeover. That replaces enough of the original Dexron to allow for the benefits of the Transynd to take over duties.
Scott

wolfe10 wrote:
Yup, major determinant is whether you have Dexron or Transynd/other approved synthetic fluid.

I have NON synthetic

Yup, major determinant is whether you have Dexron or Transynd/other approved synthetic fluid.

Here you go. Straight from Allison: Service intervals