I have a 48-8n

I got a 4 speed 8n. Were expecting another 7or 8 inches of snow tonite. The question I have- If I take the overdrive out of gear will it turn anything in the transmission to warm the grease. I know it won't run the pump. I use 80-90 weight grease.
Will the thinner gear lube mix with the thick 80w
 
The 8N came with a standard 4-speed forward, 1 speed reverse transmission. There is no 'overdrive'. There were auxiliary transmissions sold, made by other suppliers, Sherman, Hupp, Everett, and Howard. Do you have one of those too? There will be a shifter handle of some sort on the side if so. There is NO grease in the transmission. Hope you?re not putting grease in there. You use gear oil. The N's use the same sump for the hydraulics and the transmission. OEM spec was SAE MC-134-D Ford oil but CNH no longer makes that. There are a few choices to use. Many of us just use the stuff sold at TSC; GL-1 SAE 90. NAPA sells it by the 5 gallon pail, same stuff API GL-1 SAE 90. When it's cold outside, you start your tractor and let it warm up 15 minutes or so before using it. That's gets the oils nice and hot. Then you're ready to plow snow for hours. It is a good idea as well to invest in the essential manuals. They will answer a multitude of questions you may have.

CNH FORD MC-134-D HYDRAULIC OIL, NO LONGER SOLD:
<a href="https://imgur.com/khhArTc">
khhArTch.jpg" title="source: imgur.com"
</a>​

TSC TRAVELLER BRAND SAE 90 GL-1 OIL:
<a href="https://imgur.com/0fIlY5V">
0fIlY5Vh.jpg" title="source: imgur.com"
</a>​

NAPA SAE 90 API GL-1 OIL:
<a href="https://imgur.com/IQXA6Mc">
IQXA6Mch.jpg" title="source: imgur.com"
</a>​

FORD 8N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVCE MANUALS:
<a href="https://imgur.com/qI9P22k">
qI9P22kh.jpg" title="source: imgur.com"
</a>​

Tim *PloughNman* Daley(MI)
 
The original recommendation was EP Gear Oil conforming to
Ford specification M-4864-A and B, SAE 80 below +32 degrees F, and SAE 90
above +32 degrees F. (Do you want to change your hydraulic fluid every
spring and fall? ) However, the new recommendation from the local Ford-New
Holland dealer now recommends Ambra Multi-G 134 (NH-410B) synthetic fluid.
Some people stick with the original spec and use 90w mineral oil. The
modern equivalent of 90w mineral oil is TSC Traveler brand GL-1 or NAPA
part number 65-205. Those may be less expensive, but the Multi-G 134
synthetic is good from -5 to 120 degrees F. CNH sells a product called
Ambra 134D that conforms to that specification. The equivalent product
(and less expensive) from TSC that meets Ford spec M2C-134d is their
Universal Tractor Fluid. Neither of these products are SAE 90 gear oil -
they are multi-purpose oils with an exceptionally high viscosity index
engineered specifically for this type of application. The TSC product
labeled "Ford Tractor Oil" is a plain SAE 90 gear oil. Because of its much higher viscosity
index it doesn't thicken nearly as much when cold which makes it a better
performer in winter conditions. I use the TSC UTF product year
round in all my 8N's.
75 Tips
 
"The question I have- If I take the overdrive out of gear will it turn anything in the transmission to warm the grease."

No!

" I use 80-90 weight grease. "

What is 80-90 weight grease?

"Will the thinner gear lube mix with the thick 80w?"

If you are changing to 134d oil I would completely drain out whatever grease you have in there presently.
 
Just run it. It'll warm up after a half hour or so. In the meantime, think of your slow hydraulics as giving your engine time to get to operating temp :)

Switching to a UTF type fluid is a good idea in the future if you plan to do much winter work.
 

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