M813 transmission and transfer case fluid

[319cssb]

What do you all refill your transmission and transferase with , when you service them?
Lubrication Order says GO 80/90 for both. But what do you recommend for some smooth shifting?

 

[porkysplace]

A lot of guys are using 40w non-detergent in deuce transmissions .
[h=1]Transmission oil clarification[/h]

 

[319cssb]

Reading through the link and the one posted in that link was a good read. Ill get some 40w non detergent.

 

[162tcat]

M813 transmission and transferase fluid.

I use 50 weight non detergent trans fluid from my local heavy truck parts store. Napa should have it. I add a couple bottles of GM synchromesh too. Not sure if it helps but can't hurt anything except for my wallet. My trans and T Case shift much better than they did with gear oil.

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[319cssb]

I use 50 weight non detergent trans fluid from my local heavy truck parts store. Napa should have it. I add a couple bottles of GM synchromesh too. Not sure if it helps but can't hurt anything except for my wallet. My trans and T Case shift much better than they did with gear oil.

Sent from my iPhone using Tapatalk

Do you drive a m809 series?

 

[US6x4]

Spicer probably has a different oil spec'd out than what the military used. I hear if you use that it shifts easier, but I haven't taken the time to find out what it should be. Make sure not to confuse 50W drivetrain oil with 50W engine oil. The drivetrain oils have an anti-foaming agent in it that prevents bubbles from forming. Foamed up engine oil in a tranny or t-case can cause the oil to not stick to the gears and will lead to increased wear.

 

[porkysplace]

Spicer probably has a different oil spec'd out than what the military used. I hear if you use that it shifts easier, but I haven't taken the time to find out what it should be. Make sure not to confuse 50W drivetrain oil with 50W engine oil. The drivetrain oils have an anti-foaming agent in it that prevents bubbles from forming. Foamed up engine oil in a tranny or t-case can cause the oil to not stick to the gears and will lead to increased wear.

40w non-detergent motor oil won't foam