When you change the trans fluid and want to go to Mobil Syn. i heard that it will not mix with the reg fluid..and would have to make sure all the fluid is out of the trans and the converter...????

It will mix and is not a problem ... If switching to synthetic then the goal would be to get as close to a 100% fill .... I would ,as I have, do a flush ... Look up Hoot member - moderator ,and in his sig is some compiled notes to do a flush on the Allison ....


It's quite simple ...


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