Discolored Gear

[Songline]

I am perplexed at the choices available for fluids. Finding an answer seems to be a matter of trust. I have the original service manual for the engine and transmission and it gives the prefered fluid type as Shell "DEXTRON.ATF" On the tranny case it says to use "ATF-A". In my way of thinking that means Dexron=ATF-A. I mentioned above that I asked my Yanmar/service center what fluid to use and he tells me SAE30. I don't know a lot but given the information I have at hand I know that is not correct. So I don't trust him anymore. I took the tranny to different guy who has since rebuilt it, at very good price I might add and over the long weekend and during the hockey playoffs. He tells me that Dexron III is the fluid of choice and is what I have been using to date. I fear I will end up like AdamY who posted about his KBW10 burning up. I think he used SAE30 as recommended by his service guy. So my tranny burned up early using Dexron and his burned up early using SAE30. Oh well, I'll only be worried about it until I get to New Zealand.

Peter

[hellosailor]

Adding to the confusion, or perhaps clearing it?
"Dexron III/Mercon Automatic Transmission Fluid (ATF) is LUB<>LINE’s
premier transmission fluid and is the most universal product available.
...This product is excellent for manual transmission too, and may be used wherever Dexron III, Dexron II-E, Dexron II-D, Dexron II, Type A, Type A suffix A, Allison C-3, C-4, Caterpillar TO-2 fluids are called for."
From some company I never met on the web, LubLine at
http://www.lubline.com/download/auto...pdf/CatATF.pdf

And from Esso/Imperial Oil (Canada, eh!):
"ESSO ATF MERCON® V / DEXRON®-III is

MERCON® V, DEXRON®-III and MERCON®
approved. It is recommended for passenger car
and light duty truck transmissions from
manufacturers specifying DEXRON®-III,
DEXRON®-II, DEXRON®, MERCON® V,
MERCON®, Type A Suffix A, Type A, Ford

M2C-138CJ or Ford M2C-166H, including:"

Apparently universal products are all the rage these days?

Wheels-
What's the matter, they won't sell you a franchise/distributorship in your area? I thought the great thing about the whole AMSOIL system was that anyone could join it and become a reseller. No more?

[Alan Wheeler]

If I do that, I wouldn't be able to talk about it on here any more now would I :-)

[Songline]

I took the boat out yesterday for an hour and tested the transmission and all seems fine. I even found a loose mount in the process which seems to have cleared up a funny vibration I was having. I spent more time with the service manual and found that if you own a KBW10 attached to a 3GM engine you would use SAE30 oil if you own a KBW10 attached to a 3HM you would use ATF-A. So go figure, that's the story in the original service manual. The manual covers 4 engine models and I have learned to look for information for my specific model so didn't notice this until yesterday.

I see the next hurdle up ahead and have to prepare for the jump. Thank you all for your help.

[perchance]

If the gear is discolored on the teeth only it is probably ok. When they heat treat gears they usually do the teeth only and it should show up if you wash the oil off the gear.