Sterling 10.5 F-350 Rear Differential Gear Lube ? - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 09-08-2009, 05:19 PM Thread Starter Rookie
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Sterling 10.5 F-350 Rear Differential Gear Lube ?

I just recently bought a F-350 7.3 2002 with 180,000 miles. I went through and changed all the fluids last week to synthetic. In the rear differential I put Amsoil 75W-90 thinking it was the DANA 80 which it calls for. However, I discovered after the job that it is the Sterling 10.5 and requires 75W-140. Will it hurt the differential to keep the 75W-90 in there and continue to use. I tow a boat frequently also. Also, I am receiving a slight hesitation upon acceleration from a stop, but at no other time. Could this be that I need to add some friction modifier to the rear differential?
chadgillespie is offline  
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