Gear Oil for TRX300FW - Honda ATV Forum
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post #1 of 9 (permalink) Old 10-12-2010, 07:10 PM Thread Starter
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Gear Oil for TRX300FW

Just chnaged my front and rear differential gear oil and noticed the oil I used is Valvoline SAE 85W-145. Owners manual calls for SAE 80. Do I need to start all over?
Also didnt realize front Gear case on engine uses 10W-40 motor oil. I inserted the Gear oil in there also but realized my mistake. What could have happened to the gear case by using the gear oil vs. the 10w-40 motor oil anyway??
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post #2 of 9 (permalink) Old 10-12-2010, 07:14 PM
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I doubt that will hurt the diffs. I've seen a lot of people run gear oil in the front gear case/transfer case. I don't think it will hurt anything, because there isn't any pump or anything in the transfer case.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #3 of 9 (permalink) Old 10-12-2010, 07:18 PM
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yeah I use regular 80-90 gear lube in mine and have had no trouble at all.. As far as I'm concerned in the diff's any clean oil is good oil.. LOL

1988 FourTrax 300
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post #4 of 9 (permalink) Old 10-12-2010, 07:22 PM
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80w or..in your case ( no pun intended )..85w is fine..as for your transfer case..80w won't hurt it..it does call for 10-w40..but..seeing how it does not have any kind of pump..80w or 85w will be fine.

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '05 trx500fm
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post #5 of 9 (permalink) Old 10-12-2010, 07:28 PM Thread Starter
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What is the -145 part of the gear oil I have? the label says SAE 85W-145. Is this like a multiviscosity gear oil that goes from 85W to 145W whatever that means?
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post #6 of 9 (permalink) Old 10-12-2010, 07:33 PM
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Quote:
Originally Posted by bobami View Post
What is the -145 part of the gear oil I have? the label says SAE 85W-145. Is this like a multiviscosity gear oil that goes from 85W to 145W whatever that means?
Yeah, I think so.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #7 of 9 (permalink) Old 10-12-2010, 07:33 PM
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Quote:
Originally Posted by bobami View Post
What is the -145 part of the gear oil I have? the label says SAE 85W-145. Is this like a multiviscosity gear oil that goes from 85W to 145W whatever that means?
don't know about the 145 part..if your concerned..put 85w hybrid oil in your differentals.

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '05 trx500fm
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post #8 of 9 (permalink) Old 10-12-2010, 07:36 PM
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I thought it was like oil, the 10W-30 meant it flows like a 30wt in summer and a 10wt winter? Or is it that it flows like a 10wt and protects like a 30wt? don't remember for sure but the lube you used should be FINE. There was a guy here at one time that did tons of reading and research on oils and stuff not sure if he is still here.

1988 FourTrax 300
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post #9 of 9 (permalink) Old 10-12-2010, 08:31 PM
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Quote:
Originally Posted by Fourtrax View Post
I thought it was like oil, the 10W-30 meant it flows like a 30wt in summer and a 10wt winter? Or is it that it flows like a 10wt and protects like a 30wt? don't remember for sure but the lube you used should be FINE. There was a guy here at one time that did tons of reading and research on oils and stuff not sure if he is still here.
Yeah, I think that works similar to way engine oil works on the ratings.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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