Ford Differential + Trans Fluid Changes

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e40

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I'm tooling up for axle and trans fluid changes on my '06 Explorer V8 this weekend. Here's what I have so far: 6R60 Trans : Motorcraft Mercon SP, trans filter, gasket. Front Differential : Valvoline High Performance 80W-90 (Has 'limited slip' label on it) Transfer Case : Motorcraft XL-12 Transfer Case Fluid Rear Differential : Supertech 75w140 Synthetic I'm wondering if the lubes I chose for the axles are OK. I have rear axle code 45 which indicates it's not limited slip, however most of the synthetic gear lubes have limited slip additives. A quick check to the Ford axle lube chart indicates no need for friction modifiers either. So I guess I'm wondering if I should return the gear lube I have. I have to go back to the FLAPS for grey permatex anyway.
 
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You tow with it? If not A 140 would be like driving a Saleen in a school zone. No point.
 
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Fluids look OK, except swap the SuperTech for 75W-90 synthetic to help with Minnesota winters - providing you're not towing.
 

e40

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Mar 15, 2008
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387
Location
Wisconsin
I ended up changing the transfer case, and rear axle lubes. Fluids looked and smelled OK to me. I did not get to the trans fluid change, when I took the fill plug off, I found that the little plastic dipstick was broken. So I'll need to order a new one. I'll also change the front diff lube when it's back on the lift for the trans fluid job..
 
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