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OC-4 Question

Shit man. Gallons of beer! What the hell else would we be talking about. Unlessen of course your one of those high faluten types that just drink those darned fruity thingies. And if you are then you aint got no darned business here on the man side of the forums. YUP!
 
2. There is a level plug on the left side of the transmission also but sometimes the unit is not mounted level. Reductions up to fill plugs.
 
Thanks MTNCRAWLER. The reason for asking is I needed to get some for a friend but wanted to get one gallon jugs instead of one 5 gallon jug which I know is way too much.
 
My Kristi manual says the KT-3 has an S70FS differential, which is supposedly the same guts as an OC-4, but possibly in a different case. The manual says the case capacity is 6 lbs of SAE 90 and the lubrication chart says to change with 4lbs. Either way, a gallon of oil equals 6-8lbs, so a gallon should do an OC-4. Yes/No?
 
OC-4 has two interconnected compartments. Rear one is for the differential and the front one is the transmission. Each has its own drain plug but both will fill through the diff case plug on left side. I'm not familiar enough with the KT-3, does it have a transmission attached to the differential box?
 
Looks like it's just the diff with a chain connecting it to the custom Kristi tran and VW bell housing. The OC-3 diff used by the Thiokols et al is listed somewhere here as an S70F-12 while the Kristi version is listed as an S70FS.

Some day I'll get a chance and the time to tear one of these apart and doc it fully, but BigA will probably beat me to it.
 

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I have a 1404 IMP with a C4 transaxle that I changed oil in this winter. I dont remember exactly how many quarts I put in at the time but I know I started out with 12 quarts and now I have 2.5 qts. left on my shelf. Hope that helps.:thumb:
 
Sorry, had to post to this thread to get a full 'Mainer' spread on the latest updates to the forum. ;) I couldn't resist. Won't happen again!
 

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2 gallons roughly before it starts puking out the side plug. That amount fills both the differential and the transmission attached to it. May want to consider an additional quart to assure the pinion bearing gets enough lube when climbing steep grades, otherwise don't worry about it.
 
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