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billort
01-22-2006, 08:48 PM
I just finshed putting the transmission back together in a 1952 2R-6 with overdrive. Can anyone suggest a gear oil to use. I have been told to stay away from anything with a 4-GL rating and go with a 5-GL. I just rebuilt this transmission and I am concerned about Synchronizer corrosion. I have read that this is possible if I use the wrong oil. Anyone know if Lucas 80/90 would work? Thanks for the help in advance.

garyash
01-22-2006, 09:43 PM
You definitely don't want anything with high pressure additives - they dissolve the brass and bronze parts in the transmission and overdrive. If you can find it, straight 40 weight non-detergent oil is the right stuff. If you can't find it, use 30 weight non-detergent oil.

Engine oils are rated for viscosity at engine operating temperatures, gear oil are rated at lower temperatures (~70 F), so even if 40 weight engine oil sounds low, it is about the same viscosity as 80-90 weight gear oil. Only rear axles need the high pressure additives.

The main gearbox and overdrive have separate fill and drain holes.

Gary Ash
Dartmouth, MA
'48 M5
'65 Wagonaire Commander
'63 Wagonaire Standard
www.studegarage.com

Transtar60
01-22-2006, 09:49 PM
I used GL-1 Ford tractor fluid (I think it was 80W)from a Tractor Supply type store in my T-98 truck 4 spd. I have been told the GL-2 thru GL5 oils all have additives that attack the brass syncro rings.

N8N
01-22-2006, 09:54 PM
I would think that a GL-4 would be OK for the synchros, it is the GL-5 you need to stay away from. that said, I've been told that it is the OD that needs either GL-1 or engine oil to work correctly. I am not sure I understand the issue correctly but that is what I have been told.

nate

--
55 Commander Starlight
62 Daytona hardtop
http://home.comcast.net/~njnagel

Roscomacaw
01-23-2006, 01:48 PM
Then there's the synthetics!:D

Miscreant at large.

1957 Transtar 1/2ton
1960 Larkvertible V8
1958 Provincial wagon
1953 Commander coupe
1957 President 2-dr
1955 President State
1951 Champion Biz cpe
1963 Daytona project FS

wagone
01-23-2006, 06:27 PM
Would be nice to have an expert respond to this concern. A couple years ago I put Slick 50 80-90 gear oil in my Borg Warner T-10. It is a GL-5 type and the label in large print says for use in differentials and manual transmissions. It is an extreme pressure lubricant, according to the label. I would think they'd be asking for all kinds of problems if the additive ate up the synchros. But let's hear from the experts, please.
wagone and Avanti I

Roscomacaw
01-24-2006, 01:22 PM
I've been driving my Transtar with GL-5 in it's T-85 for YEARS without a problem. (16 years to be exact) I don't know if the syncros are worn. Nothing's prompted me to look inside yet[}:)]

Miscreant at large.

1957 Transtar 1/2ton
1960 Larkvertible V8
1958 Provincial wagon
1953 Commander coupe
1957 President 2-dr
1955 President State
1951 Champion Biz cpe
1963 Daytona project FS

curt
01-24-2006, 07:24 PM
WHAt about synthetics, I know they are expensive to purchase, not much more.

wagone
01-24-2006, 09:05 PM
Hey Mr Biggs, thanks for the comment on GL-5 having been in your transmission for 16 years. The synchros gotta be ok or you'd know it--don't misread the intent behind this comment, just trying to be a S A. :D:D But I feel better having read your endorsement. Thanks again.
wagone and Avanti I

Transtar60
01-24-2006, 09:44 PM
quote:Originally posted by wagone

Would be nice to have an expert respond to this concern. A couple years ago I put Slick 50 80-90 gear oil in my Borg Warner T-10. It is a GL-5 type and the label in large print says for use in differentials and manual transmissions. It is an extreme pressure lubricant, according to the label. I would think they'd be asking for all kinds of problems if the additive ate up the synchros. But let's hear from the experts, please.
wagone and Avanti I


You wanna Expert???? Call Borg-Warner or better yet Penzoil or Quaker state. You gets what you pay for here.[:o)][xx(]:)

blackhawk
01-31-2006, 02:12 AM
quote:Originally posted by curt

WHAt about synthetics, I know they are expensive to purchase, not much more.
I have been running AmsOil 75W90 gear oil in the T86 overdrive transmissions and differentials in my Studebakers for probably 20 years now. I had to add an additive in the limited slip differentials to keep the clutches from grabbing when turning, but other than that it has been a positive experience. These are cars I use for daily transportation so they accumulate a lot of miles. I have never owned anyting else. With Amsoil in the transmission, I can shift the transmission when it is -40 or -50 without bending the shift lever. Don't laugh; you ought to try that with 40 weight engine oil sometime. At those temperatures, when you start the car and let out the clutch in neutral (you did park it in neutral didn't you?), the thick oil in the transmission would literally stall the engine. Amsoil did away with those problems. And I quit having bearing failures in the T86's after switching. It made a believer out of me. I wouldn't consider going back to regular oil or gear lub. Also, I haven't seen any indication of synchronizer corrosion. This is the first I have heard of such a thing. I use the same lubricant, summer and winter. I didn't even change it when I drove the car south for vacations in the southwest during the heat of the summer. You probably don't need the lighter weight gear lub (synthetic or otherwise) for hotter locales, but my experience has been that the Amsoil 75-90 worked well over a very wide temperature range. Dale

Mike
01-31-2006, 05:31 AM
Chlorine is sometimes used as a high pressure additive. It's corrosive to brass and bronze; and to be avoided. There are other HP additives that are safe.
It's my understanding that the special additive, for limited slips, is for high heat.
Red Line has an application request service:
http://www.redlineoil.com/tech_requests.asp .
I use their MT-90 in my T-10, and 75W90 in the limited slip; both of which are worn. They run quietly. Shift action was improved, when I changed; especially a stiff second gear synchro.
If it's the car type OD trans, see "Lubrication" on the last page of the Borg Warner manual at:
http://www.tocmp.com/manuals/trans/Borg-Warner%20Overdrive/index.htm .
Mike M.