Transmission fluid

[jerseyredneck1]

I have a 2007 F-350 with the 5R110 transmission. My Operator's Manual says to use "Mercon SP" only. Is anyone out there using an Amsoil oil in this transmission, and if so, what Amsoil product do you use instead of Mercon SP? OR, should I not switch because Mercon SP is already synthetic and I should just stick to my factory schedule??:confused:

[jerseyredneck1]

Sorry, I'm illiterate. I have a 5R100 trans.

[Herb]

You would want to use the Amsoil (ATF) universal transmission fluid. It meets the Mercon SP spec. The Amsoil has a longer drain interval than the OEM fluid, 100,000 miles Normal drain interval and 50,000 miles Severe Service. With my 02 CTD I just dropped my pan and changed my filter and topped off with about 5-6 qts. I changed my filter every year and topped off.

To get the full benifit of the Amsoil ATF you would want to get as much of the OEM fluid out. Yes the OEM fluid is synthetic just as the Chrysler ATF, though I does not have the additive package of the Amsoil synthetic ATF, and will last much longer, and keep your trans run a little cooler.

[jerseyredneck1]

Thanks, Mr. Lansberg !!