Manual 3 Speed Fluid

pchelp101 · Post by **pchelp101** » Tue Jul 11, 2017 8:29 am

What does everyone recommend for fluid in a manual 3 speed? Any advances in modern days?

71Fe2O3 · Post by **71Fe2O3** » Tue Jul 11, 2017 10:55 am

I have used plain old gear oil for years without any trouble. I buy whatever is on sale. These transmissions don't need exotic additives. All the oil needs to do is keep the gears lubricated.

pchelp101 · Post by **pchelp101** » Tue Jul 11, 2017 12:53 pm

71Fe2O3 wrote:I have used plain old gear oil for years without any trouble. I buy whatever is on sale. These transmissions don't need exotic additives. All the oil needs to do is keep the gears lubricated.

That's what I am used to also, the reason I ask is my 1969 F100 is dripping "RED" fluid out of the rear seal. I bet the PO used ATF in it !!!

Jacksdad · Post by **Jacksdad** » Tue Jul 11, 2017 2:09 pm

If it shifts and sounds okay, drain it as fast you can and throw the right grade of hypoid in there. Leave it overnight to fully drain if you can. I wouldn't bother cleaning it out or rinsing it to get the last of the ATF out - I'm not sure there's any benefit. The next fluid change will pretty much do that.

I bet the inside of your transmission is awful clean

.

pchelp101 · Post by **pchelp101** » Tue Jul 11, 2017 3:07 pm

Jacksdad wrote:If it shifts and sounds okay, drain it as fast you can and throw the right grade of hypoid in there. Leave it overnight to fully drain if you can. I wouldn't bother cleaning it out or rinsing it to get the last of the ATF out - I'm not sure there's any benefit. The next fluid change will pretty much do that.

I bet the inside of your transmission is awful clean

.

Thanks Jack, I have it on the top of the "To Do" list for this weekend. How difficult would it be to change out that rear transmission seal?

sargentrs · Post by **sargentrs** » Sat Jul 15, 2017 9:05 am

IIRC, on my Ford 3.03 with long bed and 2 pc drive shaft, just remove the front drive shaft (unbolt the u-joint and carrier bearing) and pinion yoke (1 big nut), pry out seal and tap another in. Be sure and re-torque the pinion yoke nut. I like to use a 3"-6" piece of large PVC pipe with an end cap on it to drive in seals around shafts.

farmallmta · Post by **farmallmta** » Thu Aug 31, 2017 9:12 pm

Use the recommended lubricant as stated in the owner's manual.

Orrrr... you can use 40W non-detergent motor oil. O'Reilly's can get it for you, usually in a day or so. It's the Borg-Warner recommendation for the T-85 3spd-OD, both cases, and works just fine in any older manual transmission.

Non-detergent oil is used in applications not involving combustion of gases, as with an internal combustion engine. So a transmission qualifies.

pchelp101 · Post by **pchelp101** » Mon Sep 04, 2017 7:35 am

farmallmta wrote:Use the recommended lubricant as stated in the owner's manual.

Orrrr... you can use 40W non-detergent motor oil. O'Reilly's can get it for you, usually in a day or so. It's the Borg-Warner recommendation for the T-85 3spd-OD, both cases, and works just fine in any older manual transmission.

Non-detergent oil is used in applications not involving combustion of gases, as with an internal combustion engine. So a transmission qualifies.

Any particular brand you are fond of?

farmallmta · Post by **farmallmta** » Tue Sep 05, 2017 2:35 pm

I use the O'Reilly non-detergent 40W in my T-85-OD's. It's worked just fine for years and rolls good when cold.

https://www.oreillyauto.com/detail/pure ... ergent+oil

Hope this helps!

farmallmta · Post by **farmallmta** » Sat Sep 16, 2017 1:11 pm

This:

https://www.tractorsupply.com/tsc/produ ... luid-2-gal

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Manual 3 Speed Fluid

Manual 3 Speed Fluid

Re: Manual 3 Speed Fluid

Re: Manual 3 Speed Fluid

Re: Manual 3 Speed Fluid

Re: Manual 3 Speed Fluid

Re: Manual 3 Speed Fluid

two suggestions:

Re: two suggestions:

Re: Manual 3 Speed Fluid

GL-1 rated 90W if you prefer a heavier oil