Forum Discussion
jorbill2or
Dec 04, 2018Explorer II
Again , for the op ... “coach” and his 2004 Allison 3000 , while it may be compatible.. there is no reason other than cost to do it. If cost is important then just test the fluid ( 30 bucks) and do a filter change , with the required addition of transynd to the proper level .. the OP and any motorhome Allison 3000/4000 should never need to change fluid ! Provided it’s tested regularly and there are no issues of contamination. Synthetic fluid doesn’t “age out “
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