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Who currently stocks SAE 90 gear oil?

Started by Cadillac Jack 82, March 17, 2016, 12:26:10 PM

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Cadillac Jack 82


I've been looking all over the internet and I cannot find anyone who carries a non-marine SAE 90 gear oil.  Does anyone have a supplier that they would recommend?  I'm going to be draining and filling my rear differential when I do some work to my 1957 here in the next few weeks
Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

Jon S

Mobil and Lucas sell it.  I would think Advance Auto, NAPA, Pep boys and others would stock it.
Jon

1958 Cadillac Sedan De Ville
1973 Lincoln Continental Coupe
1981 Corvette
2004 Mustang GT

Cadillac Jack 82


Nope they sell 75W-90 but not straight 90
Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

Jon S

Quote from: 57shark82 on March 17, 2016, 01:39:51 PM
Nope they sell 75W-90 but not straight 90

I see.  Lucas makes an 80W/90, but you are correct - nobody makes a straight 90.  Very strange!
Jon

1958 Cadillac Sedan De Ville
1973 Lincoln Continental Coupe
1981 Corvette
2004 Mustang GT

Cadillac Jack 82

Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

Jon S

Jon

1958 Cadillac Sedan De Ville
1973 Lincoln Continental Coupe
1981 Corvette
2004 Mustang GT

Cadillac Jack 82


How much do you think I'll need?  two?  Its in 16 fluid oz.  I know that when I bought two quarts of straight 90 a while back for my 1954 Buick it took 1 1/2 quarts.  I'm just not sure how much the Cadillac rear would take
Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

Jon S

Per the 1957 Shop Manual, the Rear Axle holds 5 pints.
Jon

1958 Cadillac Sedan De Ville
1973 Lincoln Continental Coupe
1981 Corvette
2004 Mustang GT

Jay Friedman

I'd be interested in knowing the reason why you prefer straight 90 weight gear oil as opposed to 80/90 or 75/90. 
1949 Cadillac 6107 Club Coupe
1932 Ford V8 Phaeton (restored, not a rod).  Sold
Decatur, Georgia
CLC # 3210, since 1984
"If it won't work, get a bigger hammer."

Cadillac Jack 82


I'm just going by what the manual says.  It states straight 90.  If 80/90 is okay then I'll pick some of that up
Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

gary griffin

#10
Dual graded petroleum products meet the specifications for both grades so they should be O K
Gary Griffin

1940 LaSalle 5029 4 door convertible sedan
1942 Cadillac 6719 restoration almost complete?
1957 Cadillac 60-special (Needs a little TLC)
2013 Cadillac XTS daily driver

Jay Friedman

I have used 85/90 gear oil which I buy locally for many years with no problems.  It may be that back in 1957 gear oil was only manufactured as a single weight.  Multi-weight oil may not have existed then so only single weight is mentioned in the manual.
1949 Cadillac 6107 Club Coupe
1932 Ford V8 Phaeton (restored, not a rod).  Sold
Decatur, Georgia
CLC # 3210, since 1984
"If it won't work, get a bigger hammer."

dadscad

75-90 or 80-90 will do what you want. When cold they flow as 75 or 80 wt. and when hot they are 90 wt. I've been using Amsoil 75-90 Severe Gear full synthetic gear oil in my 63's differential for years, works great.
Enjoy The Ride,
David Thomas CLC #14765
1963 Coupe deVille

Cadillac Jack 82


Thank you.  I like to try to keep to original specs...so long as the original style of fluid is still available.
Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

Dan LeBlanc

Quote from: 57shark82 on March 18, 2016, 03:57:54 PM
Thank you.  I like to try to keep to original specs...so long as the original style of fluid is still available.

Can't do that with transmission fluid. The clear whale oil based Hydra-Matic fluid is long gone. ;)
Dan LeBlanc
1977 Lincoln Continental Town Car

Cadillac Jack 82

Tim

CLC Member #30850

1959 Cadillac CDV "Shelley"
1964 Cadillac SDV "Rosalie"
1966 Oldsmobile Toronado "Sienna"

Past Cars

1937 LaSalle Cpe
1940 Chevrolet Cpe
1941 Ford 11Y
1954 Buick 48D
1955 Cadillac CDV
1955 Packard Clipper
1957 Cadillac Series 62
1962 VW Bug
1962 Dodge 880
1966 Mercury Montclair
1967 Buick Wildcat Convertible
1968 Chevy Chevelle SS
1968 Plymouth Barracuda
1977 Lincoln MKV

Mike Josephic CLC #3877

80W-90 will work just fine in your differential.  Multigrade oils were
being phased in about 1955 for engine oils and it took a while to go in that
direction for other lubricating fluids.  There really is no need to seek out
a straight 90.

By the way, Mr. LeBlanc is correct -- the original hydramatic fluids
were based on sperm oil (whale oil).  They are long gone.
1955 Cadillac Eldorado
1973 Cadillac Eldorado
1995 Cadillac Seville
2004 Escalade
1997 GMC Suburban 4X4, 454 engine, 3/4 ton
custom built by Santa Fe in Evansville, IN
2011 Buick Lucerne CX
-------------------------------------
CLCMRC Museum Benefactor #38
Past: VP International Affiliates, Museum Board Director, President / Director Pittsburgh Region

Dan LeBlanc

Whale oil was used as a friction modifier in transmission fluid. In the 70s cars were made to run hotter for emissions purposes and the whale oils based fluids did not hold up under the increased underhood temperatures. Add in the moratorium on whaling and you get the transmission fluids you have today with their petroleum bases and red dye for identification purposes.
Dan LeBlanc
1977 Lincoln Continental Town Car

Carl Fielding

Tim , part of your selection process might include factoring in the mileage of the car , and the ambient temperature where and when the car will be driven. You would want a different gear oil for a new car seeing service in Alaska winters , from a 300,000 miler cruising South Florida. Synthetic multi grade gear oil is a real bright idea. Many years ago I had a nice driving '73 SDV with a bit over 100 thou on it. Fine , comfortable long distance ride. Gorgeous brown leather 60/40 interior. Bad news was a leaking pinion seal. Good news was I went to a heavier gear oil and quit lubing the pavement. It was something like a 75/80w/140. Might not have been exactly that , but it was a triple grade synthetic , certainly including 140. And then again , how many scores of thousands of miles did you say you plan to drive it ? - CC

gary griffin

Petroleum lubricants are graded by viscosity (How thick or thin it is) and Carl is on the spot correct.  This means that multi-grade products will work within the highest and lowest test temperatures specified in the test.  Petroleum engineering has improved greatly since our classic cars first went out on the road.
Gary Griffin

1940 LaSalle 5029 4 door convertible sedan
1942 Cadillac 6719 restoration almost complete?
1957 Cadillac 60-special (Needs a little TLC)
2013 Cadillac XTS daily driver