MK23 transfer case oil?

[airdrillpitcrew]

Hello everybody. Im in the middle of a complete service of a 2001 MK23 that our farm has turned into a brush fire truck. Im curious what everyone is doing for the oil in the transfer case. So far, what Im told is this unit takes 6 qts of 40w non detergent. Is this true, if so, what is everyone doing for oil in these. Truthfully, 6 qts doesnt seem like much, after all, the transfercase is huge, Im concerned that the top bearings might not get enough oil. Any info would be greatly appreciated.

 

[Mullaney]

Hello everybody. Im in the middle of a complete service of a 2001 MK23 that our farm has turned into a brush fire truck. Im curious what everyone is doing for the oil in the transfer case. So far, what Im told is this unit takes 6 qts of 40w non detergent. Is this true, if so, what is everyone doing for oil in these. Truthfully, 6 qts doesnt seem like much, after all, the transfercase is huge, Im concerned that the top bearings might not get enough oil. Any info would be greatly appreciated.

I pulled this from a manual

Table 23. Transfer Case.
Item Specification
Make and Model Oshkosh 30000 Series
Type Three shaft, single speed with torque proportioning
differential with manual differential
lock
Ratio 1.271 :1
Torque Split 32% Front, 68% Rear

Transfer Case 6 Qt. (5.7 L)
Oil Type OE/HD040

The transfer case incorporates a 32/68 differential. The transfer case 32/68 differential provides full time, all wheel drive, and proportions approximately 32 percent of the torque to the front axle and 68 percent of the torque to the two rear axles. The differential has an operator controlled, air actuated, drive line lock mechanism, which consists of a sliding lockout collar that locks the differential housing to the output shaft. The differential drive line lock mechanism provides increased mobility in adverse operating conditions.

Transfer Case
Check and Fill as Necessary
lubricant OEIHDO
Interval: 36/A (I)
View: Oand P

 

[airdrillpitcrew]

I pulled this from a manual

Table 23. Transfer Case.
Item Specification
Make and Model Oshkosh 30000 Series
Type Three shaft, single speed with torque proportioning
differential with manual differential
lock
Ratio 1.271 :1
Torque Split 32% Front, 68% Rear

Transfer Case 6 Qt. (5.7 L)
Oil Type OE/HD040

The transfer case incorporates a 32/68 differential. The transfer case 32/68 differential provides full time, all wheel drive, and proportions approximately 32 percent of the torque to the front axle and 68 percent of the torque to the two rear axles. The differential has an operator controlled, air actuated, drive line lock mechanism, which consists of a sliding lockout collar that locks the differential housing to the output shaft. The differential drive line lock mechanism provides increased mobility in adverse operating conditions.

Transfer Case
Check and Fill as Necessary
lubricant OEIHDO
Interval: 36/A (I)
View: Oand P

View attachment 913037

This is great, thank you. Does it say anything anywhere about requiring non detergent? I assume it might want it because of the clutch pack. I just want to confirm this before I special order more oil. Thanks a bunch

 

[airdrillpitcrew]

I pulled this from a manual

Table 23. Transfer Case.
Item Specification
Make and Model Oshkosh 30000 Series
Type Three shaft, single speed with torque proportioning
differential with manual differential
lock
Ratio 1.271 :1
Torque Split 32% Front, 68% Rear

Transfer Case 6 Qt. (5.7 L)
Oil Type OE/HD040

The transfer case incorporates a 32/68 differential. The transfer case 32/68 differential provides full time, all wheel drive, and proportions approximately 32 percent of the torque to the front axle and 68 percent of the torque to the two rear axles. The differential has an operator controlled, air actuated, drive line lock mechanism, which consists of a sliding lockout collar that locks the differential housing to the output shaft. The differential drive line lock mechanism provides increased mobility in adverse operating conditions.

Transfer Case
Check and Fill as Necessary
lubricant OEIHDO
Interval: 36/A (I)
View: Oand P

View attachment 913037

Since it appears you have the real info, any tips or info on servicing the planatery's?

 

[Mullaney]

This is great, thank you. Does it say anything anywhere about requiring non detergent? I assume it might want it because of the clutch pack. I just want to confirm this before I special order more oil. Thanks a bunch

.
HD = High Detergent

 

[Guyfang]

 

[Mullaney]

Since it appears you have the real info, any tips or info on servicing the planatery's?

.
Gear Oil 80w90 , 1.6 quarts dry.
Rotate the axle where the drain / fill is at the bottom. Drain accordingly, then rotate, refilling with about 1.5 quarts of 80w90

 

[Elijah95]

To reclarify, the t case takes HDO40, which in layman’s terms is heavy duty oil otherwise known as diesel oil. Micah Adams put a video out on YouTube, use 15-40 diesel oil


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