Differential Oil Question - Yamaha Grizzly ATV Forum
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post #1 of 10 Old 01-28-2010, 02:51 PM Thread Starter
 
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Differential Oil Question

Have an 05 Grizzly 660. What kind of gear oil do you guys run in the front and rear diff?
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post #2 of 10 Old 01-28-2010, 05:01 PM
 
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I use specified Yamaha Gear Lube per the service manual.

A pickup, a few trailers and some rides.
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post #3 of 10 Old 01-28-2010, 05:02 PM
 
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I use Amsoil Severe Gear Oil (synthetic)

'03 660 Green Grizz! - 26" Mud Bugs on SS112
K&N filter - Snorkels - 2" Receiver - Custom 2" tip
Warn 3000RT Front/ 2500 Rear
HL Temp Gauge - Hand/Thumb Warmers
Amsoil 10W-40 Synthetic Motorcycle Oil
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post #4 of 10 Old 01-28-2010, 05:27 PM
 
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royal purple max gear oil 75w-90. good stuff.

08 Grizzly 787:

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post #5 of 10 Old 01-28-2010, 05:40 PM
 
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Just did mine and used Royal Purple. I'd go with a synthetic no matter whichever you choose.
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post #6 of 10 Old 01-28-2010, 05:48 PM
 
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Quote:
Originally Posted by johnnylaw View Post
I'd go with a synthetic no matter whichever you choose.
X2!

'03 660 Green Grizz! - 26" Mud Bugs on SS112
K&N filter - Snorkels - 2" Receiver - Custom 2" tip
Warn 3000RT Front/ 2500 Rear
HL Temp Gauge - Hand/Thumb Warmers
Amsoil 10W-40 Synthetic Motorcycle Oil
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post #7 of 10 Old 01-28-2010, 06:21 PM
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hi guys tex here, ive been told many times that you cant run synthetic oil if you already used regular oil, is this right ,and if you can why should i.
thanks for the help.
tex.

07 700 grizzly.
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post #8 of 10 Old 01-28-2010, 07:15 PM
 
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you can use any SAE 80API "GL-4" Hypoid Gear Oil. napa sells it. cheap money. change it at least once a year.
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post #9 of 10 Old 01-29-2010, 02:42 AM
 
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Quote:
Originally Posted by tex View Post
hi guys tex here, ive been told many times that you cant run synthetic oil if you already used regular oil, is this right ,and if you can why should i.
thanks for the help.
tex.

07 700 grizzly.
You CAN switch to synthetic if you ran dino previously. Synthetic does not break down as fast from heat like dino oil does. It has a wider range of heat tolerance and dissipates heat better. The additives in the oil still do break down and the oil gets contaminated over time so you still need to change it regularly. Synthetic is also better for temps below freezing.
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post #10 of 10 Old 01-30-2010, 11:51 AM
 
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Quote:
Originally Posted by Toxarch View Post
You CAN switch to synthetic if you ran dino previously. Synthetic does not break down as fast from heat like dino oil does. It has a wider range of heat tolerance and dissipates heat better. The additives in the oil still do break down and the oil gets contaminated over time so you still need to change it regularly. Synthetic is also better for temps below freezing.
X2 , I especially like it in the winter. That dino oil takes a while to get flowing when it's below freezing, considering there isn't all that much oil in there to begin with. Plus it runs alot cooler in the summer. Didn't have as many overheating probs in my 660 after I changed to the synthetic.

2009 Grizzly 700 SE
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Viper MX3500 winch w/synthetic rope
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