Rear Gear Lube - Synthetic Or Conventional?

Eman · 07-31-2015, 09:22 AM

My opinion, your results may vary.
Conventional gear oil, cheap and readily available and designed for rears. So cheap that changing it every year is a no brainer. I install rare earth magnets in engine,trans and rear to catch any wear particles which is what wears out gears and bearings. Drain,clean and refill and your rear will last.
Synthetics are usually thinner and will flow well, also made to withstand heat which drag cars usually don't see. Cost more but you're only using 2 quarts so it's not a bank breaker. Possibly a little better lubrication and possibly worth the peace of mind but not necessary on a drag car.
Shockproof doesn't make any sense to me. thick as mud and it's claim to fame is it clings, so does axle grease! Might be great in a roundy round car where the rear gets very hot. I want thin oil that flows all of the time.

07-31-2015, 09:22 AM	#21
Eman Member Join Date: May 2014 Location: E TN Posts: 473 Likes: 16 Liked 133 Times in 76 Posts	Re: Rear Gear Lube - Synthetic Or Conventional? My opinion, your results may vary. Conventional gear oil, cheap and readily available and designed for rears. So cheap that changing it every year is a no brainer. I install rare earth magnets in engine,trans and rear to catch any wear particles which is what wears out gears and bearings. Drain,clean and refill and your rear will last. Synthetics are usually thinner and will flow well, also made to withstand heat which drag cars usually don't see. Cost more but you're only using 2 quarts so it's not a bank breaker. Possibly a little better lubrication and possibly worth the peace of mind but not necessary on a drag car. Shockproof doesn't make any sense to me. thick as mud and it's claim to fame is it clings, so does axle grease! Might be great in a roundy round car where the rear gets very hot. I want thin oil that flows all of the time.