GL-5 vs GL-4 Gear Oil

J

Jon-Ohio

Senior Member
Was wondering if 140 wt GL-5 type gear oil is safe to use in the Model A steering gear with bronze bushings ?

The gear oil article below says that it can damage "yellow metals" i e bronze bushings ,gears etc.

Is it safe for transmissions and differentials ?

Gl-4 type gear oil, which is safe for bronze bushings, is getting hard to find these days. Thanks for any input.

http://www.widman.biz/uploads/Transaxle_oil.pdf
 
Another option mentioned (I have obtained, but not installed yet) is Pennrite Steering Box Lube, comes in a 1/2 litre bottle, about $16 + shipping. Available from
Restoration Supply Co.
15182B Highland Valley Rd
Escondido, CA 92025
800-306-7008

www.RestorationStuff.com VERY "thick", if your strg box leaks this should greatly help. Do a search hear on the barn : Steering lube-Penrite 1200W
Paul in CT
 
A GL-5 gear oil is safe for use in the steering box as there are not the temperatures necessary to be corrosive. Some GL-5 gear oils can be corrosive to brass or bronze depending on the concentration of reactive sulphur used and temperatures present.

We are using the ShockProof Heavy with very good results, providing very good protection and clings well to the upper bearing which tends to operate above the fluid level.

Regards, Dave
Red Line Oil

http://www.redlineoil.com/product.aspx?pid=44&pcid=8
 
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