How Many Quarts of Gear Oil...*(UPDATE)*

[1-ton]

go into an NP205.

I want to change the oil in my NP205. My cheap ass Haynes repair manual does not even come with this basic information.

 

[84_Chevy_K10]

Re: How Many Quarts of Gear Oil...

I'd say about 4

 

[JonV]

Re: How Many Quarts of Gear Oil...

Conventional transfer case holds 2.5 U.S. QTS, fill to plug hole. Use 80W-90, GL-5. In Canada, you can use 80W. I live where its HOT, so I use a 90W /forums/images/graemlins/cool.gif. If you have a PTO, may take more.

 

[pvfjr]

Re: How Many Quarts of Gear Oil...

I used about four by the time I got done making a mess.

 

[1-ton]

Re: How Many Quarts of Gear Oil...

Thanks for the replies. I am going to get a couple more quarts of gear oil to make sure I have enough.

 

[84_Chevy_K10]

Re: How Many Quarts of Gear Oil...

I use 85W-140.

 

[1-ton]

Re: How Many Quarts of Gear Oil...

That is what I got. I bought some of that cheap Wal-mart Super Tech SAE 85W-140 GEL-5 that goes for about $1.75 a quart.

 

[1-ton]

Re: How Many Quarts of Gear Oil... *(UPDATE)*

Well, JonV was correct. My transfer case took 2.5 quarts to fill. It was definitly automatic tranny fluid that came out of it, but I put 85W - 140 GEL-5 back into it.

 

[84_Chevy_K10]

Re: How Many Quarts of Gear Oil... *(UPDATE)*

Yours is so new it's probably spec'ed for ATF, but I would put GL-5 in it also if I were you.

 

[1-ton]

Re: How Many Quarts of Gear Oil... *(UPDATE)*

The transfer case is a little quieter with the gear oil instead of the ATF (not that it was all that loud to begin with).

 

[jon v]

Re: How Many Quarts of Gear Oil... *(UPDATE)*

General rule of thumb. Newer chain driven transfer cases take lighter oils like ATF. My 1979 owners manual says for full time 4x4 10w-30 or 10w-40 engine oil and only fill to 1/2 inch below filler plug hole, and it holds 4 qts. Conventional gear driven, NP205, gear oil... OEM spec GL5 80w or 80W-90, fill to level of filler plug hole. You'll do ok in vegas with 85w-140, cause its so hot, but what happens in manual transmissions is the syncros don't like to line up with heavier oil, especially when its cold, and it's harder to shift. You don't want to be too heavy viscosity in tranny or transfer case. Axles go heavier, 85w-140 or 90w, or 140w. Cold ambient air temps, no, 80w-90 or 90w. /forums/images/graemlins/cool.gif