3.73 gears 9.75 diff max tow.

[Csvt18]

I’m going to swap out my rear diff cover with the spicer version and want to change the oil. My trucks a 2022 f150 with the noted gears and diff in title. Dies it come with 75w90 oil?

I’m looking switching to 75w140 as I tow a 7000 lb camper several times during spring/summer. Just concerned how it’ll do here in Michigan winters.

also majority of gear oils add in friction modifier. Is that going to hurt my E locker in any way? I know I’m not “supposed” to use it but even amsoil adds it.

Sponsored

 

[Ranger621]

????n I have the same rig and a 7000 pound Flagstaff.

 

[HammaMan]

Wish banks made their diff cover for the 9.75! Ever since they started getting the JLTV engine contract they've just slowed down on their typical aftermarket parts.

 

[Mosey]

Ford rear diff lub is 75w85.

Sponsored