Transmission oil

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C

carbuff

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Location
Upstate New York
My manual transmission rebuilder says not to use synthetic oil on the transmission; but I saw a thread suggesting Redline MT-80 which is a synthetic oil. It advertises to be used in manual transmissions.
 
I have an 883.

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Mineral base GL-4 (not GL-5) in SAE 80W-90, 90 or 140.
Since you're upstate (where?), 80W-90 will be fine. Unless you drive only in hot weather and do foot to the floor power shifts, SAE 140 is unnecessary.
Several choices at Summit, from cheap to expensive. Others available elsewhere.
Sta-Lube was recently a good option, but I'm not seeing it available at a reasonable price.

PennGrade 1 77296 PennGrade Multipurpose Classic GL-4 Gear Oil | Summit Racing
Driven Racing Oil 04530 Driven Racing Oil GL-4 Gear Oil | Summit Racing
Richmond Gear RICHGL4 Richmond Gear GL-4 Gear Oil | Summit Racing
VP Racing 2703 VP Racing Classic GL-4 Gear Oil | Summit Racing
 
Over the counter 80W-90 as suggested for cooler climates, 140 for hotter climates or hard usage. I've never run the high name brand stuff because of the differences in pricing. I can buy the generic stuff at my local parts store much cheaper and it's never failed me.
 
In 68, in my 833 4 speed, Chrysler recommended auto transmission fluid which was type F back then.
 
It depends. You can use SPME synthetics in your gear box.

Rather than hash it out here, I suggest you get on the phone and call Torco, Redline, Amsoil, Lucas and any other company you can think of and ask them what oil THEY think you should use.

They know their oils better than anyone on here unless you are a tribologist.
 
I just use regular 80W-90 in Ma. Granted I don't drive it in the winters but still fine in the spring and fall. Years back I did half Redline and half 80w-90. Really didn't notice much difference.
 
So do you believe the guy who built it or random threads online?

I believe the vendors thet service and sell Crysler 833 4 speeds might be a reliable info source here. Brewers says GL4 80/90. Not synthetic.

I don't believe that the oil vendors that specialize in modern vehicles can accurately advise you on a 1960's technology manual trans.
 
Synthetic is good as long as it's the right synthetic. I use Redline made for these 4-speeds.
 
413 said:
So do you believe the guy who built it or random threads online?

I believe the vendors thet service and sell Crysler 833 4 speeds might be a reliable info source here. Brewers says GL4 80/90. Not synthetic.

I don't believe that the oil vendors that specialize in modern vehicles can accurately advise you on a 1960's technology manual trans.
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How can this turn into a debate? GL4 mineral gear oil. NOT synthetic, NOT GL5 with additive. Its that simple.
 
For an A833, it is. You disagree with Dan Brewer? Please enlighten me as to how wisdom caught you and not him?
 
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Muswagon said:
For an A833, it is. You disagree with Dan Brewer? Please enlighten me as to how wisdom caught you and not him?
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Why bother? You’ll argue I’m wrong but I can tell you that you can use synthetic gear oil in them. I have been for decades.

You should do some research before you make such claims.
 
I use this and it works great. (and I'm not even a Pennzoil fan)

pennzoil syncromesh.jpg
 
Sorry, I am going to trust Brewers decades of research and experience. You can even use ATF in an A833, just like your claim that its just fine to use synthetic.... of course they will work because they are lubrication, but you still should not use them as many more times than not the results and performance of GL4 mineral based is better. May I ask why you disagree with Brewer and literally any other old school 4 speed builder? At this point I wish I had not engaged, sounds like wisdom caught you and ran you right over.
 
Muswagon said:
Sorry, I am going to trust Brewers decades of research and experience. You can even use ATF in an A833, just like your claim that its just fine to use synthetic.... of course they will work because they are lubrication, but you still should not use them as many more times than not the results and performance of GL4 mineral based is better. May I ask why you disagree with Brewer and literally any other old school 4 speed builder? At this point I wish I had not engaged, sounds like wisdom caught you and ran you right over.
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Yes, you are correct. I don't have a clue what I'm talking about.

And YOU are the reason I didn't answer you. You don't care the reasons why I do what I do. You want to argue.

Do exactly what you want. You already know the answer.

The FACT is you can use synthetic gear oil if you know what to use. You don't want to hear that.

No offense to Dan Brewer but I don't care what he uses for gear oil. That's not a reflection on him, but on the absurdity of your argument.

I already knew what you are before I even responded.
 
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