Allison Man: Have a 2003 Winnebago Adventurer 35U Workhorse Chassis with Allison 1000. Want to replace the filter at 5000 miles but am having defficulty finding out if it was delivered with Dextron or TranSynd. Checked with Winnebago, Workhorse and Allison. Took delivery in May 2003 and understand all Allisons after March 2003 had the preliminary fill with TranSynd but am not certain if it was later topped off with Dextron. Since I will only lose a quart or two when changing the filter at 5000 miles would it be okay to go with TranSynd and then refill it all with TranSynd when the time for change comes? Thanks

I would assume it is Dexron III if there is no Transynde tag on your dipstick or at least a red wiretie that holds this on. Cheaper for OEM that way. Thanks and have a g :) reat day!