PDA

View Full Version : What's the right gear oil?



bams50
06-13-2007, 09:04 PM
... for T-86 3-spd. O/D trans.?

I remember it being touched on before, but don't remember the answer(s)...

Robert K. Andrews Owner- IoMT (Island of Misfit Toys!)
Parish, central NY 13131
http://www.cardomain.com/ride/2358680/1

vegas paul
06-13-2007, 09:53 PM
90 wt. mineral oil.

Las Vegas, NV
'51 Champion Business Coupe G899965 10G-Q4-1434
http://i151.photobucket.com/albums/s144/vegas_paul/1462673_2_350.jpg?t=1180041622 http://i151.photobucket.com/albums/s144/vegas_paul/graciestude.jpg?t=1180041703

DilloCrafter
06-14-2007, 12:34 AM
The Borg Warner overdrive manual also says 40 weight (non-detergent) motor oil can be used. A gallon of it is about $10 less than a gallon of 90w mineral oil at Tractor Supply Co.

http://rocketdillo.com/studebaker/misc/images/Avacar-hcsdc.gif[/img=left]DilloCrafter

1955 1/2 Ton Pickup
[i]The Red-Headed Amazon
Deep in the heart of Texas

bams50
06-15-2007, 07:57 PM
So not regular gear oil then; why not?

Probably will go with motor oil then, since I've never owned mineral oil- and wouldn't know where to get it..

Robert K. Andrews Owner- IoMT (Island of Misfit Toys!)
Parish, central NY 13131
http://www.cardomain.com/ride/2358680/1

N8N
06-15-2007, 08:01 PM
AKA GL-1 also available at Fleet Farm, Tractor Supply, etc. maybe even a good FLAPS.

I'm told that the OD like an automatic transmission needs "just right" friction characteristics so you need to stick with something close to the oil it was originally designed for.

nate

--
55 Commander Starlight
http://members.cox.net/njnagel

garyash
06-15-2007, 10:05 PM
Another option is Pennzoil "Synchromesh", comes in a 1-quart yellow jug. It is a modern oil specified for Chrysler and GM manual transmissions, but it says very specifically that it is also rated for transmissions with brass and other yellow metal parts. That's the big issue with GL-5, etc. - the modern additives will eat up brass and bronze parts in old transmissions. The big thing is not to use "high pressure" lubricants intended for rear axle lube. The other diffence between motor oil and gear oil is that motor oil is viscosity rated at 212 F and gear oil is rated at much lower temperatures, like 70 F. That's why non-detergent 40 weight motor oil is basically the same as 90 weight gear lube.

[img=left]http://www.studegarage.com/images/gary_ash_m5_sm.jpg[/img=left] Gary Ash
Dartmouth, Mass.
'48 M5
'65 Wagonaire Commander
'63 Wagonaire Standard
web site at http://www.studegarage.com

DilloCrafter
06-15-2007, 11:41 PM
quote:Originally posted by garyash
The other diffence between motor oil and gear oil is that motor oil is viscosity rated at 212 F and gear oil is rated at much lower temperatures, like 70 F. That's why non-detergent 40 weight motor oil is basically the same as 90 weight gear lube.

Thanks for that info Gary! I have been wondering about how a 90wt mineral oil can be equivalent to a 40wt motor oil.

http://rocketdillo.com/studebaker/misc/images/Avacar-hcsdc.gif[/img=left]DilloCrafter

1955 1/2 Ton Pickup
[i]The Red-Headed Amazon
Deep in the heart of Texas

Tom B
06-16-2007, 12:28 AM
When I was installing the OD transmission on my Lark, I was advised by a well respected Stude guy to use half and half 30 wt non detergent oil and STP engine treatment. It's mean stuff to work with, but he swore by it. I've certainly had no problems with it in two years and about 6,000 miles.

[img=left]http://www.alink.com/personal/tbredehoft/Bothcars.jpg[/img=left]
Tom Bredehoft
'53 Commander Coupe
'60 Lark VI
'05 Legacy Ltd Wagon
All three Indiana built OD cars

bams50
06-16-2007, 06:56 AM
Thanks, all; an't believe I forgot to put this in the OP, but:

How much does it hold?

I've always filled to the level of the fill hole; how much would that be for a T-86?

Robert K. Andrews Owner- IoMT (Island of Misfit Toys!)
Parish, central NY 13131
http://www.cardomain.com/ride/2358680/1

dan0
06-16-2007, 07:30 AM
Gary/ All-
Are the two sections of the trans seperated? we have plugs on the fwd and aft sections.
I'm glad I read this thread! --Still finalizing the T-86 setup in my 2R11.
dan0

Herd:
06 Jetta TDI
1941 M15
1953 2R11
2001 F-350
1989 Caprice
Deere's:
67' 112H
88' 332

Randy_G
06-16-2007, 08:05 AM
quote:Originally posted by bams50

Thanks, all; an't believe I forgot to put this in the OP, but:

How much does it hold?

I've always filled to the level of the fill hole; how much would that be for a T-86?

Robert K. Andrews Owner- IoMT (Island of Misfit Toys!)
Parish, central NY 13131
http://www.cardomain.com/ride/2358680/1




According to the book the Standard w/OD 1959 V-8 (59V) holds 4.06 pints. The Six Standard w/OD (59S) holds 3.15 pints.

Randy_G
1959 Lark Sedan
www.AutomotiveHistoryOnline.com
http://www.automotivehistoryonline.com/sedan4small.jpg

garyash
06-16-2007, 10:08 AM
Yes, Dan0, you need to fill both sections until the oil begins to drip out the hole. I use a little pump oil can to fill the transmission - it isn't quick, but it's one way to make oil flow up hill.

[img=left]http://www.studegarage.com/images/gary_ash_m5_sm.jpg[/img=left] Gary Ash
Dartmouth, Mass.
'48 M5
'65 Wagonaire Commander
'63 Wagonaire Standard
web site at http://www.studegarage.com

dan0
06-16-2007, 10:14 AM
Gary-
Locating Penzoil here in Wichita is a challenge; Jiffy-Lube however has it.
Will 2qts do it? Can I service the aft section through the gov hole opening?
dan0

Herd:
06 Jetta TDI
1941 M15
1953 2R11
2001 F-350
1989 Caprice
Deere's:
67' 112H
88' 332

garyash
06-16-2007, 04:02 PM
2 qts is plenty. I don't know if the governor hole goes to the right place. Those big pipe plugs are square and tapered, tough to get a good grip on. I got some 8-point sockets to deal with them, but a big adjustable wrench works.

[img=left]http://www.studegarage.com/images/gary_ash_m5_sm.jpg[/img=left] Gary Ash
Dartmouth, Mass.
'48 M5
'65 Wagonaire Commander
'63 Wagonaire Standard
web site at http://www.studegarage.com

dan0
06-16-2007, 05:08 PM
Nearly 2 qts synchromesh installed.
FWIW: the rear and the front fill the same - we can service the rear and it drains to the front; and vice-versa.

Do I NEED the L/O switch? I see the case of the switch leaks. Gear grease is a PITA on the floor...
dan0

Herd:
06 Jetta TDI
1941 M15
1953 2R11
2001 F-350
1989 Caprice
Deere's:
67' 112H
88' 332