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Old 02-13-2013, 06:17 AM   #41
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In older transmissions weight , and the cost of parts and maching time was less important.

Our ancient Twin Disc has huge wide gears ,do not have the loading of modern gears that are perhaps 1/2 or 1/3 the width.

No oil cooler , no oil pump , splash lubrication is fine for old tech .
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Old 02-13-2013, 05:29 PM   #42
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Yes, there is a transmission cooler. Just got the word from PRM New Age, "Synthetic or part synthetic oil is not approved. Use a diesel engine mineral oil only."

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Old 02-13-2013, 05:49 PM   #43
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What the heck is "PRM New Age"?

Sounds like Marin's "next generation" talk.

I think they won't recommend synthetic because it's not well defined. Too many base stock types out there to test for approval. They may use synthetic themselves but as I've said before synthetic is only needed under very extreme conditions like very high heat. Racing motorcycles need synthetic lube. Trawlers certainly don't. Nor do street cars.
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Old 02-13-2013, 07:20 PM   #44
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Yes, there is a transmission cooler. Just got the word from PRM New Age, "Synthetic or part synthetic oil is not approved. Use a diesel engine mineral oil only."

Bob
Interesting. I wonder why no synthetic if they approve multigrade? Too slippery?
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Old 02-13-2013, 07:59 PM   #45
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Interesting. I wonder why no synthetic if they approve multigrade? Too slippery?
I'm going to go with ignorance.
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