What weight oil do you use in transmission and rear end
 

Hey Guys,

What weight gear oil are you running in your transmission and rear end gear boxes?

Re: What weight oil do you use in transmission and rear end
 

600w from Model A vendors,Others will have different oils

Re: What weight oil do you use in transmission and rear end
 

SAE 250 GL1/2 from a German brand. (Rektol Klassik)
Using it for gearbox, differential and steering box. No complaints.

Re: What weight oil do you use in transmission and rear end
 

Either 140 or 250 in transmitter, steering box. Anything from 80-250 [ or 600W] in the rear.

Re: What weight oil do you use in transmission and rear end
 

Stalube 140 gear oil

Re: What weight oil do you use in transmission and rear end
 

90W-140 G5. Modern oils have wear reducing additives.

Re: What weight oil do you use in transmission and rear end
 

I use SAE 85W140 GL5 Super Tech Gear Oil from Walmart in the transmission and differential.

Re: What weight oil do you use in transmission and rear end
 

You could try a lighter weight oil in the transmission, I just find that I don't like the way it shifts.

Re: What weight oil do you use in transmission and rear end
 

Bert's Model A.

Re: What weight oil do you use in transmission and rear end
 

Stalube 140 Gear Oil

Re: What weight oil do you use in transmission and rear end
 

600w steam cylinder oil. exact same stuff the model a suppliers sell, so I get it in 5-gallon buckets. no complaints except my diff is weeping oil from the bottom. no biggie, just got to keep an eye on it.

Re: What weight oil do you use in transmission and rear end
 

That is not the weight of the oil but a type of oil.
Back in the 30's it was call 600W and is just a heavy pressure steam oil designed for straight cut gears. Today it has a different reference but people have researched the current naming.

https://www.vintagefordforum.net/for...il-information

Re: What weight oil do you use in transmission and rear end
 

Yep, 600W is a designation for the old steam cylinder oil. It works out to about 180-240 weight.

Re: What weight oil do you use in transmission and rear end
 

This is what I use: https://lucasoil.com/products/engine...oil-stabilizer It makes a huge improvement in tranny feel. Smoother shifts, slick feel to shifting, quiets gear noise. I've had it in my A tranny for years now, no comparison to the vendor 600W sludge.

Re: What weight oil do you use in transmission and rear end
 

eagle, Do you use that product straight or blended with something else?

Re: What weight oil do you use in transmission and rear end
 

I have been using a mix of 50% 600W oil and 50% STP. No leaks, shifting is great, works for me.

Enjoy.