Going to Service the Transfer case soon. Probably going to use Redline.

[Northfork]

So it is time to service my transfer case, I have the truck on Redline engine oil and the mobil 1 trans oil (G56) and thinking that the Redline Mopar Spec ATF is the way to go.
I searched a bunch and my efforts failed for threads on this topic.
Any input one way or another on this?
Research said it holds 7.5 quarts? seems like a lot...

 

[Ozymandias]

Every ATF is fine in the NV271/273, no need for anything specific.
Use what you want to use, the ATF+4 is only for the workshops to only have one ATF in Stock, it is not needed in any way.
And yes there is a lot of Oil in it because it is a real big TC.

 

[NIsaacs]

Looks like 2 quarts. This should be good info:

https://r.search.yahoo.com/_ylt=Awr...-fluids//RK=2/RS=1Ufe9j3pHcyFsI7bHugMlpkr7uo-

 

[Blu-meanie]

If you attempt to put 7.5 quarts into it, you will be cleaning 5.5 quarts up off the floor. Believe NIsaacs, 2 quarts and do not completely fill to top.

 

[Ozymandias]

Looks like 2 quarts. This should be good info:

https://r.search.yahoo.com/_ylt=Awr9Imv9dKdbLU0ALIpXNyoA;_ylu=X3oDMTByb2lvbXVuBGNvbG8DZ3ExBHBvcwMxBHZ0aWQDBHNlYwNzcg--/RV=2/RE=1537729917/RO=10/RU=https://torqueking.com/dodge-and-ram-transfer-case-fluids//RK=2/RS=1Ufe9j3pHcyFsI7bHugMlpkr7uo-

that sure is correct from dealers sight, but if you check out the others like Ford & Gm that used the same TC, one calls for Mercon something and the other wants to see Dexron VI in the same TC.
See the point?

 

[NIsaacs]

that sure is correct from dealers sight, but if you check out the others like Ford & Gm that used the same TC, one calls for Mercon something and the other wants to see Dexron VI in the same TC.
See the point?

My point was volume, nothing else.

 

[Northfork]

Thanks gentlemen...I suspected there was a typo in the info I had on volume.

 

[nibroc]

oughta use 2 qts. atf+4 and nothing else

 

[cerberusiam]

Oughta use something other than ATF and only aorund 2 quarts, that is for sure. DD not as big a problem but if you are towing definitely consider stepping up to a 50 wt syn oil.

 

[NIsaacs]

Oughta use something other than ATF and only aorund 2 quarts, that is for sure. DD not as big a problem but if you are towing definitely consider stepping up to a 50 wt syn oil.

Why? The t-case don't do anything in 4x2, just acts like a carrier bearing, straight through power no torque on anything. As far as better oil I have no problem with that, but not just because you tow. I tow heavy all the time and I don't think twice about my t-case unless I have a bad off highway haul and need 4 low. I run the factory fill.

 

[cerberusiam]

Exactly, a bearing being lubed by ATF, which is notorious for not being the best at actually lubricating. How many bearings on the main shaft? How many couplings that are subject to wear? The ONLY reason that t-case is using ATF, same as the G-56 which we all KNOW gets specced a better lube everywhere else, is because Dodge did not want to spec more than 1 fluid for all the drive train components for cost and ease. About as lame an excuse as there is for not specing a good fluid, the diffs would have ATF if they could have justified it.

ATF is an acronym for Automatic Transmission Fluid, last time I checked neither the G-56 nor the NP271\273 was one of those, they have gears and chains and bearings that need a solid lube that will stick. I have seen way too much nasty looking ATF come out of t-cases even at recommended change intervals. If one is running loaded a good share of the time and in the heat or warmer ambient temps why cheap out on t-case fluid? It is only a couple quarts to fill with a good syn fluid and have better protection.

 

[jhenderson]

Cerb. I agree atf is a poor lubricant but isn’t 50wt a little heavy for the pump?

 

[cerberusiam]

The 50 wt syn oil is really not as heavy as you think, probbaly the equivalent of a standard 30 wt. If one is really worried then cut it 50-50 with syncro-mesh, it will blend nicely.

 

[jhenderson]

I have read of others using synchromesh fluid in their 3rd gen cases. It makes sense to me because it’s a far better lube than atf and is specifically formulated for gear and bearing lube. Low temps don’t seem to be a problem for it either.

 

[Northfork]

This is the reason I brought this question up, considering the older trucks I have owned never ran ATF. I have some Mobil1 5wt, but don't know where to get synchromesh to mix 50 50...any suggestions on a brand for it in a local parts store?

 

[jhenderson]

Pennzoil from autozone or advance. I used to run it in my NV 5600

 

[cerberusiam]

The 5wt is too light. Pennzoil SyncroMesh should be available at any of the auto parts stores.

 

[John2713]

A friend used redline in a road-ranger was not impressed. After 25 plus years using amsoil products, I always stick with them. Just my thoughts.

 

[NIsaacs]

This is the reason I brought this question up, considering the older trucks I have owned never ran ATF.

The older trucks used gears for 4x4 and low range, in 4x2 they about the same as the new ones. Just a big ole carrier bearing with no heat or torque applied to any gears or the case. The new t-case uses a chain and gears for 4x4 and a 6 pinion planetary for low range. The new ones also have an oil pump to lube the top half. They don't have gears to carry the oil up to the top. A chain wrapped 3/4 of the way around a gear is a huge contact foot print versus one tooth on a gear set. Same thing for a 6 pinion planetary. They use 6 gears rotating around one gear. Torque is applied and shared by 6 gears making contact on one, in 6 places. They do not create heat like a manual transmission does, especially in 4x2.

Keep in mind, an automatic transmission with a converter has more pieces and parts that need lubrication than the manual transmission and t-case combined. ATF works for them. A manual transmission can create a lot of torque, applied to a small contact point so oil sheer is real. Stay away from ATF on them.

 

[KATOOM]

Drain it and fill it with what fluid type the factory calls for... I believe thats ATF+4 too.