jeepguy1948
Well-known member
My new to me ‘30 has a Ryan Overdrive which I am not familiar with. What oil should be used?
Ryan Oil?
- Thread starter jeepguy1948
- Start date
Doug Linden
Senior Member
Tom Endy has a great overview of the Ryan Overdrive. May have some oil info, Check it out: https://www.santaanitaas.org/wp-content/uploads/2018/09/Ryan-Overdrive.pdf
CWPASADENA
Well-known member
I would think 90-140 gear lube would be fine. I do not think I would want to run 600W.
My opinion,
Chris W.
My opinion,
Chris W.
Bruce of MN
Well-known member
It seems to hang down pretty far, I wonder if it is a problem in normal use on the street. The Mitchell horizontal orientation seems better.
Big hammer
Well-known member
Reading from past posts one suggested calling Dan Ryan , this was from 2011 , the consensus was using a multi viscosity modern gear oil , 85w-140 and NOT use 600w , Bert’s model a parts use to sell the ryan OD’s .
Y-Blockhead
Well-known member
Looking at Tom Endy’s pictures of a Ryan O/D, it is interesting to see the use of shift dogs instead of true synchros, much like a motorcycle. Very cool concept. 85w-140 gear oil should work great. I don't see any brass parts so it should be OK to use GL5.
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rotorwrench
Well-known member
The use of GL4 is consistent with any older unit that has soft metal bushings or thrust washers. The acidic qualities of GL5 is high enough to deteriorate the soft metals over time. The old Borg Warner overdrives have a roller type sprag clutch in the rear unit that can also have problems with high EP gear lubes. Motor oil can be used but it has to be the equivalent viscosity of the recommended gear lube. SAE 90 gear lube is equivalent to SAE 50 motor oil since they are graded differently.
Y-Blockhead
Well-known member
85w-140 gear oil GL4 is getting hard to find.
GPierce
Well-known member
Just bought a gallon of 140GL4 GEAR OIL at “O”Reilly Auto parts. I use it in my Mitchell O.D. and transmission.
https://www.oreillyauto.com/detail/...-oil/mp03/80040?q=Master+pro+140+gl4+gear+oil
Y-Blockhead
Well-known member
Yes, that is what I use also, in my Mitchell Trans, O/D and rear end. But it is hard to find 85W140 GL4. Even the MasterPro 85W140 is GL5.