Friction Modifier???????????
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Senior User
Joined: Jun 2003
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Friction Modifier???????????
Lately when I am driving my expy up a hill and get on it I can feel a slight jerkiness feels like from the rear, not the engine. I have the fluid changed in the rear about a year ago not at a dealer and I really don't know if they put the friction modifier in. and they can't tell me either. Could it not having it in cause this going straight when you get on the gas? If so should I put a bottle in and what if it is in will it hurt to have more in.? thanks for your help
Fleet Owner
Joined: Dec 2006
Posts: 20,637
Likes: 37
From: Lost in Pa.
Not having the friction modifier should be more of an issue when turning not going strait so I don't think this is your problem and since it's been a year ago since the fluid was changed if modifier was not added at the time you would have noticed it right after. Sounds like you may have a slight miss.
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