Oil & Fuel TC34DA Owners Manual Doesn't Mention Correct Oil for Front Axle

[Norcal M5]

Man, I've read through the manual several times and cannot find the correct lubricant type for the front axle (has diff and final reduction gears). It could be hydraulic fluid or maybe 90W gear oil. Don't want to guess. Anyone with a similar 4wd NH that can help clear this up? :confused2:

 

[Norcal M5]

I see that Jinman answered a similar question saying hydraulic oil. This hadn't come up in earlier search. Answered - NVM!

 

[djradz]

Man, I've read through the manual several times and cannot find the correct lubricant type for the front axle (has diff and final reduction gears). It could be hydraulic fluid or maybe 90W gear oil. Don't want to guess. Anyone with a similar 4wd NH that can help clear this up? :confused2:

Do not use 90W! The front axle, diff and final drives use the standard NH 134 fluid, now available in multi-viscosity.

 

[jinman]

. . . and in case you missed it in my former post. Be careful not to overfill. The oil in the front axle should show full on the dipstick with the dipstick NOT screwed in. That ensures you have proper air space in the axle so the air can compress when things heat up. The axle is sealed without a vent. If you fill the axle with no air space, expanding fluid will blow out seals.