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TechTalk · 10-24-2003, 04:21 PM

Allison 653 transmission fluid Allison recommends Castrol Transynd synthetic ATF as well as Dextron II, Dextron III, or C4 oil. Allison has a service bulletin that goes into detail regarding ATF recommendations. It may be available on the Allison web site. Newell recommends synthetic fluid (we use Mobil Synthetic ATF) and uses it for initial factory fill on new coaches. However, it is more difficult to justify the extra cost of synthetic ATF on a less expensive coach, so our suggestion would be to use a Dextron II or III, or an approved C4 oil.

10-24-2003, 04:21 PM	#2
TechTalk Senior Member Join Date: Feb 2000 Posts: 304	Allison 653 transmission fluid Allison recommends Castrol Transynd synthetic ATF as well as Dextron II, Dextron III, or C4 oil. Allison has a service bulletin that goes into detail regarding ATF recommendations. It may be available on the Allison web site. Newell recommends synthetic fluid (we use Mobil Synthetic ATF) and uses it for initial factory fill on new coaches. However, it is more difficult to justify the extra cost of synthetic ATF on a less expensive coach, so our suggestion would be to use a Dextron II or III, or an approved C4 oil. __________________ Hopefully this helps.