The Ford Barn

Jon-Ohio · 03-14-2011, 05:29 PM

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

CarlG · 03-14-2011, 06:12 PM

Some of the guys here use straight STP in their steering gears.

1931 flamingo · 03-15-2011, 09:07 AM

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

Dave @ Red Line · 03-15-2011, 10:22 AM

Sponsored Links (Register now to hide all advertisements)

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

03-14-2011, 05:29 PM	#1
Jon-Ohio Senior Member Join Date: May 2010 Posts: 191	GL-5 vs GL-4 Gear Oil 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

03-14-2011, 06:12 PM	#2
CarlG Senior Member Join Date: Nov 2010 Location: Anchorage, Alaska Posts: 9,115	Re: GL-5 vs GL-4 Gear Oil Some of the guys here use straight STP in their steering gears.

03-15-2011, 09:07 AM	#3
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: GL-5 vs GL-4 Gear Oil 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

03-15-2011, 10:22 AM	#4
Dave @ Red Line Junior Member Join Date: May 2010 Posts: 4	Re: GL-5 vs GL-4 Gear Oil Sponsored Links (Register now to hide all advertisements) 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