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  #1  
Old 03-27-2004, 12:52 PM
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Default Why is my tranny oil gray?

I go to change my transmission oil today to find it a complete gray color. It did not look like it had some gray streaks orrrr was slightly gray, it looked as if the oil was meant to be this color. I run Pennzoil 10w40 (which I was told was a good oil) and it looks like every other type of motor oil. I changed it with Pennzoil, ran the bike for no more than 15 minutes and again it is all gray.

No metal shavings come out when I drain it, the oil smells just like oil, haven't lost a drop of radiator coolant, clutch works fine, shifts good, so I figure there can't be to much wrong with it. Anyone have any ideas?
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Old 03-27-2004, 02:14 PM
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Default Re: Why is my tranny oil gray?

You may have a slight water pump leak. How long has your bike been sittng? Is it cold where you live? It's possible that condensation has accumulated in the gearbox. Pennzoil wasn't made for motorcycle wet clutchs or transmission gears. It doesn't work very well. Use a good gear lube made for motorcycles, your bike will shift better and last longer and your clutch will love you. And if you disagree tell it to Vic Krause (MR KNOW_IT_ALL) He just rips on guys using Pennzoil in their bikes!
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Old 03-27-2004, 02:18 PM
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Default Re: Why is my tranny oil gray?

crogg's got it.
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Old 03-27-2004, 02:24 PM
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Default Re: Why is my tranny oil gray?

get some Bel Ray Gear Saver 80W
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Old 03-27-2004, 02:26 PM
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Default Re: Why is my tranny oil gray?

Okay thanks guys, I'll stop using that stupid gas station oil. I checked the radiator coolant again and it was actually a little lower than I thought, but not to low. I ride my bike daily and it hasn't been cold here for the past month. I'm a little stumped at this point, I'm going to get some good oil and use that. I'll constantly check my oil and radiator fluid too.
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Old 03-27-2004, 02:33 PM
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Default Re: Why is my tranny oil gray?

I know when i had my cr 125(01) the oil would get dirty fast and would have a gray look to it from the alum. friction plates.
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Old 03-27-2004, 04:04 PM
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Default Re: Why is my tranny oil gray?

But I have aftermarket steel plates. YZ145, do you like your YZ alot better than your old CR125?
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Old 03-27-2004, 04:43 PM
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Default Re: Why is my tranny oil gray?

Quote:
Originally posted by CRacer
But I have aftermarket steel plates. YZ145, do you like your YZ alot better than your old CR125?
Heck yeah, I love it!!!
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Old 03-27-2004, 07:59 PM
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Default Re: Why is my tranny oil gray?

YZ, I also had an 01 CR125 with the stock alum plates and I never got grey oil. It would turn dark brown/black if I left it in too long, but it never would come out grey. Sounds like you had a water pump leak.

CRacer, anytime you get grey oil, you have water in it. Sounds like the pump seals for sure. Fortunately they are not too hard to swap out and not expensive. With a good service manual you should have no trouble. Also make sure the bearings and shaft are in good shape. (the shaft is not grooved).

Also, only a small amount of water is needed to turn the oil grey, so you may not notice much coolant loss.
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Old 03-27-2004, 08:42 PM
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Default Re: Why is my tranny oil gray?

Thanks dell, it sounds like that's what my problem is. It has been a tad low on coolant, but I figured it was nothing to worry about. I thought that since it was so gray that there was no way that a little bit of coolant could completely turn my oil gray, but I bet your right.
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Old 03-27-2004, 09:47 PM
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Default Re: Why is my tranny oil gray?

Creek crossings at all, or did you dump it. IF you do a lot of this, I would change your oil every ride. Its good measure to do this anyway, but not neccesary in my uneducated eyes. Also, I feel most any 10w30 is perfectly fine for your it.Change when you should and theres no problem.
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Old 03-28-2004, 10:03 AM
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Default Re: Why is my tranny oil gray?

I have have the same problem when I chang the oil in my bike I have a 2003 yz125 I just did a topend and I hope it not the gasket I put in!!!!! There all new gaskets I do use Pennzoil 10w30 for oil. What should I do to cjange for the problem?
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Old 03-28-2004, 10:23 AM
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Default Re: Why is my tranny oil gray?

Before you go changing seals and stuff, give it a couple of quick oil changes with a moto-specific oil. When I got my last YZ125 (used) it was gray/milky. Changed it again after 1 ride and it was slightly gray. 3rd change it was normal and stayed that way from there on. It MAY just be a lil water contamination.
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Old 03-28-2004, 10:32 AM
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Default Re: Why is my tranny oil gray?

If you have any doubts about the seal, you can pressure test it or just change it.

Vic Krause??? Mr Knowitall? fortunately, unless he returned to that column he has been gone for years. Rondo Talbot who probably should leave too is was doing it the last time I borrowed a copy of that rag.

TT your choice of oil has nothing to do with the gray color. Buy what makes it shift the way you like.
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  #15  
Old 03-28-2004, 10:36 AM
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Default Re: Why is my tranny oil gray?

I switched from Pennzoil to Halvoline, I know still not the best oil but I just wanted to see if that oil would change turn gray. I made sure the coolant level was set and went riding for no more than 20 minutes. Checked the oil, and it looked just like when I poured it out of the bottle, absolutely NO coolant loss. Starting to think maybe that Pennzoil reacts to something and turns gray. Because as soon as I even start the bike that Pennzoil is gray.

Sooo I'm starting to think there really isn't anything wrong with it. I'm going to continue to keep a very close eye on my oil and coolant. Going to get some bike specific oil and hopefully everything will be fine.
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Old 03-28-2004, 10:44 AM
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Default Re: Why is my tranny oil gray?

here is something you might try, take the clutch cover off and see if there was a bunch of clutch contaminated oil there. If the last owner was making the most out of his transmission oil, you may have a real build up there. you will have to look way down into the remaining case with a flashlight to see, or take the entire case off that covers that side.

I have never seen pennzoil or any other oil turn gray as fast as yours is without an outside source like the contamination from the clutches,,,if the former owner burned a few of them and didnt clean it well that may be the case for yours. pulling the outer basket off of your clutch when you have the cover off may show some fine gray "dust". that will tell you something too.
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Old 03-28-2004, 10:46 AM
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Default Re: Why is my tranny oil gray?

I think you nailed it ossagp! Just needs a little "flushing".
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  #18  
Old 03-28-2004, 05:15 PM
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Default Re: Why is my tranny oil gray?

Good thinking ossagp. But, I had the clutch plates and springs replaced by a dealer (should've done it myself). Maybe that means that that is out of the question.
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  #19  
Old 03-28-2004, 11:42 PM
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Default Re: Why is my tranny oil gray?

Unless he took the entire right side case off, he may not have cleaned it out. So nice to see someone so innocent and naive LOL. Of course a dealer could have left it in there.

It is either that or you have a little factory in there making gray oil.
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  #20  
Old 03-29-2004, 08:31 PM
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Default Re: Why is my tranny oil gray?

After I got my used 2k CR 500R, I changed the trans oil with Honda 80/90w (red bottle). When I drained out the old oil it looked gray like these guys are talking about. Maybe the previous owner never changed it and rode it through water and kept it stored up a lot and caused some condensation in there. I don't know really, but the Honda oil is red, and to fix my stripped drain plug I got to drain the stuff, so I'll see how it looks then.

Btw, Honda oil was only like $4.50 a qt for 80w-90 trans oil. I didn't feel like going back to the dealer so I bought some Mobil-1 Synthetic 75w-90 gear lubricant ($6.99 a qt) . Will this work fine since it's close to the same thing?
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