Rearend fluid change out ??

MAD-DOG · 03-05-2015, 09:42 AM

Looking for some recommendations for putting Syn oil in the rearend, not only EZGO but other manufactures also .. Ive done some reading and some suggest that by changing out the conventional oil to Syn you can actually gain some speed because of less drag . What weight oil are we using ????

usgicollector · 03-05-2015, 09:52 AM

I'm using Valvoline 75w-90 full synthetic gear oil.

JohnnieB · 03-05-2015, 11:12 AM

I'm using Lucas 85W-140 conventional gear oil, but will probably switch to synthetic 75W-140 or 75W-90 the next time I change it.

MAD-DOG · 03-05-2015, 01:51 PM

I've heard of using 30w synthetic

rbuggies48IN · 03-05-2015, 01:53 PM

Castrol HYPOY C Gear Oil SAE 80W-90 is my cart. "Maximum Gear Protection for Motorcycle, ATV and Scooter Transmissions."

cgtech · 03-05-2015, 06:50 PM

The main benefit of the heavier weight oils is reduced gear noise. The golf cart axle has no provisions for adjusting gear lash like a car axle does. All you do is assemble it, then "it is what it is". A thinner oil could give adequate protection, with increased efficiency due to reduced drag. The main drawback is increased gear noise. You will notice the difference in noise, but probably will see no significant increase in top speed. If you are considering this as a potential "speed upgrade", i think you will be dissapointed. You might see a slight increase in range (like ~5%).

MAD-DOG · 03-05-2015, 07:23 PM

Great explanation thanks so I'm thinking 75 90 synthetic is the way to go

mattadata · 03-09-2015, 09:29 AM

How often should this be changed? I am pretty sure the previous owner never did it....it must be time for me.

JohnnieB · 03-09-2015, 09:52 AM

Quote:

Originally Posted by mattadata

How often should this be changed? I am pretty sure the previous owner never did it....it must be time for me.

About every 5 years.

FWIW: Gear oil and Motor oil are rated on different scales. SAE 85W Gear oil has about the same viscosity as SAE 30 Motor Oil.

LostHusker · 03-09-2015, 10:15 AM

Just an FYI from the ezgo manual

03-05-2015, 09:42 AM	#1
MAD-DOG Gone Wild Join Date: Sep 2009 Location: WI Posts: 157	Rearend fluid change out ?? Looking for some recommendations for putting Syn oil in the rearend, not only EZGO but other manufactures also .. Ive done some reading and some suggest that by changing out the conventional oil to Syn you can actually gain some speed because of less drag . What weight oil are we using ????

03-05-2015, 09:52 AM	#2
usgicollector Gone Wild Join Date: Mar 2014 Location: NE Indiana & SW Florida Posts: 3,234	Re: Rearend fluid change out ?? I'm using Valvoline 75w-90 full synthetic gear oil.

03-05-2015, 11:12 AM	#3
JohnnieB Techno-Nerd Join Date: Jun 2011 Location: West Virginia Posts: 19,654	Re: Rearend fluid change out ?? I'm using Lucas 85W-140 conventional gear oil, but will probably switch to synthetic 75W-140 or 75W-90 the next time I change it.

03-05-2015, 01:51 PM	#4
MAD-DOG Gone Wild Join Date: Sep 2009 Location: WI Posts: 157	Re: Rearend fluid change out ?? I've heard of using 30w synthetic

03-05-2015, 01:53 PM	#5
rbuggies48IN Gone Wild Join Date: Apr 2013 Location: La Quinta Posts: 273	Re: Rearend fluid change out ?? Castrol HYPOY C Gear Oil SAE 80W-90 is my cart. "Maximum Gear Protection for Motorcycle, ATV and Scooter Transmissions."

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03-05-2015, 06:50 PM	#6
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Rearend fluid change out ?? The main benefit of the heavier weight oils is reduced gear noise. The golf cart axle has no provisions for adjusting gear lash like a car axle does. All you do is assemble it, then "it is what it is". A thinner oil could give adequate protection, with increased efficiency due to reduced drag. The main drawback is increased gear noise. You will notice the difference in noise, but probably will see no significant increase in top speed. If you are considering this as a potential "speed upgrade", i think you will be dissapointed. You might see a slight increase in range (like ~5%).

03-05-2015, 07:23 PM	#7
MAD-DOG Gone Wild Join Date: Sep 2009 Location: WI Posts: 157	Re: Rearend fluid change out ?? Great explanation thanks so I'm thinking 75 90 synthetic is the way to go

03-09-2015, 09:29 AM	#8
mattadata Gone Wild Join Date: Dec 2014 Location: Dallas, TX Posts: 247	Re: Rearend fluid change out ?? How often should this be changed? I am pretty sure the previous owner never did it....it must be time for me.

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