Cooling System - C4/C5 Models

• 6.6L Automatic Transmission

25.8 L

27.3 qt

• 6.6L Manual Transmission

26.1 L

27.6 qt

• 8.1L Automatic Transmission

28.2 L

29.8 qt

• 8.1L Manual Transmission

28.5 L

30.1 qt

Cooling System - C6/C7/C8 Automatic Transmission

• 7.2L Caterpillar® C7 Engine (hp 207 - 230)

29.7 L

31.4 qt

• 7.2L Caterpillar® C7 Engine (hp 250 - 300)

29.5 L

31.2 qt

• 7.8L DURAMAX® 7800 Engine (hp 200 - 215)

31.9 L

33.7 qt

• 7.8L DURAMAX® 7800 Engine (hp 230 - 275)

31.5 L

33.3 qt

• 8.1L Vortec 8100 MD Gas (hp 225 - 295)

• 30.8 L

• 32.5 qt

Cooling System - C6/C7/C8 Manual Transmission

• 7.2L 207 - 230 hp Engine

27.7 L

29.3 qt

• 7.2L 207 - 230 hp Engine with A/C and Increased Cooling

31.2 L

33.0 qt

• 7.2L 250 - 300 hp Engine

31.0 L

32.8 qt

• 7.2L 250 - 300 hp Engine with A/C and Increased Cooling

31.5 L

33.3 qt

• 7.8L 200 - 230 hp Engine

29.9 L

31.6 qt

• 7.8L 200 - 230 hp Engine with A/C and Increased Cooling

33.4 L

35.3 qt

• 7.8L 250 - 300 hp Engine

33.0 L

34.9 qt

• 7.8L 250 - 300 hp Engine with A/C and Increased Cooling

33.5 L

35.4 qt

• 8.1L 225 - 295 hp Engine

31.5 L

33.3 qt

• 8.1L with A/C and Increased Cooling

33.0 L

34.9 qt

Engine Oil with Filter

• 6.6L DURAMAX® 6600

13.8 L

14.6 qt

• 7.2L Caterpillar® C7

28.4 L

30.0 qt

• 7.8L* DURAMAX® 7800

22.5 L

23.8 qt

• 8.1L Vortec 8100 MD Gas

9.4 L

10.0 qt

Check fill level on the oil indicator after initial fill to make sure it is actually full. Oil level may vary depending on vehicle option content.

*Additional oil is required with auxiliary oil filter systems. Make sure to add enough extra oil to fill the auxiliary oil filter system. For vehicles equipped with the LUBERFINER 750-C, add 14 quarts (13.25 L).

Fuel Capacity - C4/C5 Models

• Optional* (Dual Tanks)

151.4 L

40 gal

• Optional

94.6 L

25 gal

• Optional

121.1 L

32 gal

• Standard

151.4 L

40 gal

• Optional

227.1 L

60 gal

• Optional

302.8 L

80 gal

*One 25-gallon (94.6 L) tank and one 15-gallon (56.8 L) tank

Fuel Capacity - C6/C7/C8 Models

• Standard

189.2 L

50 gal

• Optional

132.4 L

35 gal

• Optional

189.2 L

50 gal

• Optional† (Dual Tanks)

264.8 L

70 gal

• Optional** (Dual Tanks)

283.8 L

75 gal

• Optional& (Dual Tanks)

378.5 L

100 gal

†Two 35-gallon (132.4 L) tanks

**One 25-gallon (94.6 L) tank and one 50-gallon (189.2 L) tank

&Two 50-gallon (189.2 L) tanks

Front Axle (G38) and (FRX)

3.7 L

7.8 pt

Rear Axle - Single Speed

• 80 (GL4)

4.7 L

10.0 pt

• 19060D (HPL), 19060S (HPK), 21060D (HPN), 21060S (HPP)

14.7 L

31.0 pt

• 23090S (HPT)

19.0 L

40.0 pt

• 23105D (HNB), 23105S (HNA)

26.5 L

56.0 pt

• 26105S (HPA)

25.5 L

54.0 pt

• S135 (GL8)

12.3 L

26.0 pt

• S110 (HD2)*

4.7 L

10 pt

• S150 (HO8)

13.0 L

28.0 pt

*For the S110 (HD2) add an additional 1.7 pt (0.8 L) lube for the hubs.

Rear Axle - Tandem

• DS344 (HPI), DS404 (HPE), DS404P (HPJ)

15.1 L

32.0 pt

• RSH44 (HP3)

14.7 L

31.0 pt

Rear Axle - Two-Speed

• 19060T (HPM), 21060T (H15)

18.0 L

38.0 pt

• 23082T (H25)

19.0 L

40.0 pt

• 26080T (GJ4)

20.8 L

44.0 pt

Transfer Case (Four-Wheel Drive)

1.9 L

4.0 pt

Transmission Fluid, Automatic

• 3000 RDS and EVS, and 3500 RDS and EVS

24.6 L

52.0 pt

• 1000 HS, RDS, MH, PTS and EVS, 2200 HS, RDS, MH, PTS and EVS, 2500 HS and RDS, and 2400 Series

13.5 L

35.0 pt

Add 2 pints (1 L) when changing spin-on or remote filter.

See the Allison® Automatic Transmission Operator's Manual for fluid check and maintenance information.

Transmission Fluid, Manual

• FS5205A, FS5205C

5.5 L

11.6 pt

• FS6305A, FS6305B,

8.7 L

18.4 pt

• FS5406, FSO8406

8.8 L

18.5 pt

• RT6609

5.9 L

12.5 pt

• RT8709B

11.8 L

25.1 pt

• RT8908LL

13.8 L

29.1 pt

• ZF S6-650

6.0 L

12.7 pt