Synthetic oil in the front diff? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Number21 · 11-10-2010, 07:14 AM

I happen to have gotten the gallon of Royal Purple gear lube I need for my 14 bolt rear end for free, I can't believe this stuff cost $18/quart! I'm putting it in the rear mostly for better gas mileage/cooler temperatures.

My front diff needs a fluid change too...D44 I think? I've never had a vehicle with locking hubs before. Since my front wheels are unlocked and freewheeling 99% of the time, is it a complete waste of money to buy some more Royal Purple for the front? I don't do any serious offroading with this thing and rarely use 4WD. Better off just going with the cheap stuff since it's "unhooked" most of the time? Does the front diff even warm up when the front wheels are unlocked?

11-10-2010, 07:14 AM	#1
Number21 Registered User Join Date: Aug 2009 Location: Oregon Posts: 611	Synthetic oil in the front diff? I happen to have gotten the gallon of Royal Purple gear lube I need for my 14 bolt rear end for free, I can't believe this stuff cost $18/quart! I'm putting it in the rear mostly for better gas mileage/cooler temperatures. My front diff needs a fluid change too...D44 I think? I've never had a vehicle with locking hubs before. Since my front wheels are unlocked and freewheeling 99% of the time, is it a complete waste of money to buy some more Royal Purple for the front? I don't do any serious offroading with this thing and rarely use 4WD. Better off just going with the cheap stuff since it's "unhooked" most of the time? Does the front diff even warm up when the front wheels are unlocked? __________________ '73 K20 Cheyenne Super Camper Special 350/TH350/NP205 sittin' on 33's. You can set my truck on fire and roll it down a hill, and I still wouldn't trade it for a Coupe de Ville.



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