Rear end lubricant for my 95 F350 dually - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 6 (permalink) Old 11-11-2013, 06:00 PM Thread Starter
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Rear end lubricant for my 95 F350 dually

Been trying to read some up on the rear end lube for my dually. Thought I would replace it soon as I don't know if the PO ever swapped it out. What is suggested type oil and do I need some additive like I put in my posi rear in my Buick? Or no additive? What's a good type? I have 129,000 miles on it and would feel better changing it now.Could I go to a synthetic or is it a waste of money?

Pat Harmon

Kinda boring and mostly stock with a couple mods
1995 F 350 7.3L Crew Cab Dually Automatic
4 inch Flo Pro exhaust RJM Injection headlight harness,new headlights and lenses Ultralite boost and pyrometer gauges in a 2 gauge pillar pod open air filter mod,heated gooseneck mirrors with led lights,Open element filter
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post #2 of 6 (permalink) Old 11-11-2013, 06:36 PM
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Re: Rear end lubricant for my 95 F350 dually

mine is not a dually just a srw LS but it calls for 80/90 with friction modifier
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post #3 of 6 (permalink) Old 11-12-2013, 02:14 AM
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Re: Rear end lubricant for my 95 F350 dually

You have to check and see what type you have, if its a sterling you need 75w140 with friction modifier, if its a Dyna you need like 75w90 with NO modifier, either way the best brands are gonna be redline, schaeffers, amsoil or Mobil 1, I use Mobil 1 in mine, mainly cause its easy to find vs having to order the others.

02 250 CCLB, 6 spd, PHP Phoenix, ISSPROs, AFE/6637 intake, 4" DE straight exhaust, WW, coolant filter with ELC, AIH delete, ebpv delete, bellowed uppies, 4" on 35's and racelines
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post #4 of 6 (permalink) Old 11-15-2013, 02:05 AM
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Re: Rear end lubricant for my 95 F350 dually

The friction modifier isn't dependant on what type of axle it is. A Sterling or Dana with a limited slip will need a modifier. A Sterling or Dana that isn't limited slip doesn't need it.

Many synthetics are slippery enough that they don't need a friction modifier. The particular brand will say so right on the bottle.

Personally I like Redline 75w-140, whether it's a Sterling or Dana axle.
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post #5 of 6 (permalink) Old 11-15-2013, 10:27 AM Thread Starter
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Re: Rear end lubricant for my 95 F350 dually

I was eying up the redline 75w-140 myself...The guy at the counter told me I didn't need the modifier either,but I am not sure I believe him totally. I asked him what would happen if I added the friction modifier with the synthetics and he said Ummm...I swapped my Grand Cherokees to synthetics in the front and rears and actually gained some minimal MPG. Not saying I am in this truck,but it can't hurt to try or just let alone replace the fluid.

Pat Harmon

Kinda boring and mostly stock with a couple mods
1995 F 350 7.3L Crew Cab Dually Automatic
4 inch Flo Pro exhaust RJM Injection headlight harness,new headlights and lenses Ultralite boost and pyrometer gauges in a 2 gauge pillar pod open air filter mod,heated gooseneck mirrors with led lights,Open element filter
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post #6 of 6 (permalink) Old 11-16-2013, 09:33 PM
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Re: Rear end lubricant for my 95 F350 dually

I wouldnt add the modifier unless it gets some rearend chatter

02 250 CCLB, 6 spd, PHP Phoenix, ISSPROs, AFE/6637 intake, 4" DE straight exhaust, WW, coolant filter with ELC, AIH delete, ebpv delete, bellowed uppies, 4" on 35's and racelines
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