Mitchell over drive questions

Here is one source for 85-140 API-GL4: https://www.amazon.in/SCHAEFFLER-TruPower-Commercial-Vehicles-Transmission/dp/B0D47YF7XG

You are right though, it is hard to find online. Part of the reason is how Google search works. It will not weed out gear oils that do not conform to exactly what you are searching for.

I bought my GL4 85W-140 at O'Reilly auto parts store in Wilkesboro, North Carolina.

Not many people are buying cars with manual transmissions anymore so there is not much call for GL4 rated gear oil.

I just ran over to O'Reilly's. Actually I drove. I bought a gallon of their Masterpro GL-4, SAE 140 Gear Oil. I think this is what I bought before and did not notice that it was not a multi viscosity grade. I think it will be OK in my car as I rarely drive when it is -65 F out. It being a single viscosity oil it will be thicker at 70 F.

As I get older my mind wonders and I miss details sometimes. Does that happen to you?
 
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nkaminar said:
Here is one source for 85-140 API-GL4: https://www.amazon.in/SCHAEFFLER-TruPower-Commercial-Vehicles-Transmission/dp/B0D47YF7XG

You are right though, it is hard to find online. Part of the reason is how Google search works. It will not weed out gear oils that do not conform to exactly what you are searching for.

I bought my GL4 85W-140 at O'Reilly auto parts store in Wilkesboro, North Carolina.

Not many people are buying cars with manual transmissions anymore so there is not much call for GL4 rated gear oil.

I just ran over to O'Reilly's. Actually I drove. I bought a gallon of their Masterpro GL-4, SAE 140 Gear Oil. I think this is what I bought before and did not notice that it was not a multi viscosity grade. I think it will be OK in my car as I rarely drive when it is -65 F out. It being a single viscosity oil it will be thicker at 70 F.

As I get older my mind wonders and I miss details sometimes. Does that happen to you?
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The Schaeffler oil you link to is unavailable. I'll try O'Rielly's. Thanks.
 
nkaminar said:
I just ran over to O'Reilly's. Actually I drove. I bought a gallon of their Masterpro GL-4, SAE 140 Gear Oil. I think this is what I bought before and did not notice that it was not a multi viscosity grade. I think it will be OK in my car as I rarely drive when it is -65 F out. It being a single viscosity oil it will be thicker at 70 F.
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I did a little research on Master Pro 140 GL-4. It is a mineral based oil and manufactured for O'Reillys by Valvoline.

Since I can't seem to find 85W-140 GL-4 (seems all is GL-5), I will be using MasterPro 140 in my Mitchell Scnchro Trans and O/D along with in my third members. Makes it easier to use in all three.

Thanks for suggesting MasterPro 140 GL-4. I just bought a couple of gallons.
 
P.S. said:
Any question about fluid has been beat to death
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Not if you want to ensure you have the best/correct lubricant for your vehicles. Just about every 85W-140 Geal Oil available these days is labeled GL-5.
 
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I wrote an email to Valvoline and they recommend NOT to use G5 in a transmission with yellow metals. They have a fluid they recommend for synchro transmissions but it is thin viscosity.

Run to your automotive dealer and try to buy a car with a manual transmission. The modern automatic transmissions are a lot more efficient than the automatic transmission in a 1954 Chevrolet. And full electric cars don't have transmissions.
 
It would be helpful to hear the experience of long time Mitchell owners who have followed Steve Mitchell’s guidance and used GL-5.
 
Here is my experience and why I switched to G4. I found brass looking flakes in my overdrive oil during an annual oil change.
 
GPierce said:
It would be helpful to hear the experience of long time Mitchell owners who have followed Steve Mitchell’s guidance and used GL-5.
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I have an earlier Mitchell OD with a lot of miles on it, and have never had an issue with it.

I’ve used the oil they recommended which I can’t recall without going in the garage to verify but want to say it’s a 75-140w, semi synthetic. I’ve never paid attention to the GL rating.
 
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