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12-32 Edition 47
On-Highway Trucks
Appendix D
●
Transmission Specifications
Feature
Code
Cat CX31 Automatic
CT681 6x4 114 BBC
CT680 6x4 124 BBC
CT660 6x4 116 BBC
CT660 6x4 122 BBC
CT660 4x4 122 BBC
CT660 6x6 122 BBC
CT680 8x6 124 BBC
CT660 8x6 116 BBC
CT660 8x6 122 BBC
Speeds
Rated
lbf-ft
Gear Ratios
R4 R3 R2 R1 F1 F2 F3 F4 F5 F6
0013CZY CX31 with Retarder for CT13 Engines
x x x
x x x 6 1900
3.97 *4.4 *2.2 1.53 1.00 0.72 0.61
0013CZZ CX31 for CT13 Engines
x x x x x x x x x 6 1900
3.97 *4.4 *2.2 1.53 1.00 0.72 0.61
*Multiply 1st and 2nd by 1.9 to account for torque converter.
Torque converter locks up at 75% of 2nd gear speed range.
Feature
Code
Eaton Manual Air Shift
CT681 6x4 114 BBC
CT680 6x4 124 BBC
CT660 6x4 116 BBC
CT660 6x4 122 BBC
CT660 4x4 122 BBC
CT660 6x6 122 BBC
CT680 8x6 124 BBC
CT660 8x6 116 BBC
CT660 8x6 122 BBC
Speeds
Rated
lbf-ft
Gear Ratios
R4 R3 R2 R1 F1 F2 F3 F4 F5 F6 F7
0013GHC Fuller FRO-13210C
x
x
x 10 1350
2.80 13.75 12.69 9.29 6.75 4.90 3.62 2.64 1.90
0013GHJ Fuller FR-14210B
x x x x x x
10 1450
2.72 12.12 11.06 8.19 6.05 4.46 3.34 2.48 1.83
0013GHL Fuller FRO-14210C
x x x x x x
x 10 1450
2.80 13.75 12.69 9.29 6.75 4.90 3.62 2.64 1.90
0013GHW Fuller RTO(F)-14908LL x x x x x x
10 1450
2.89 9.85 15.22 14.56 9.42 6.24 4.63 3.40 2.53 1.83
0013GGV Fuller FRO-12210C
x
x
10 1550
2.80 13.75 12.69 9.29 6.75 4.90 3.62 2.64 1.90
0013GHP Fuller FR0-15210C
x x x x
x x x 10 1550
2.80 13.75 12.69 9.29 6.75 4.90 3.62 2.64 1.90
0013GHS Fuller FRO-16210C
x x x x x x x x x 10 1650
2.80 13.75 12.69 9.29 6.75 4.90 3.62 2.64 1.90
0013GHX Fuller RTO(F)-16908LL x x x x x x
10 1650
2.89 9.85 15.22 14.56 9.42 6.24 4.63 3.40 2.53 1.83
0013GMZ Fuller RTO(F)-14909ALL x x x x x x
11 1450
3.43 13.03 20.84 26.08 16.30 11.85 7.41 5.23 3.79 2.77
0013GNA Fuller RTO(F)-16909ALL x x x x x x x x x 11 1650
3.43 13.03 20.84 26.08 16.30 11.85 7.41 5.23 3.79 2.77
0013GRD Fuller RTLO(F)-12913A x x x x x x
13 1250
3.50 13.22 12.31 8.64 6.11 4.43 3.23 2.29 1.95
0013GRE Fuller RTLO(F)-14913A
x x
13 1450
3.50 13.22 12.31 8.64 6.11 4.43 3.23 2.29 1.95
0013GKJ Fuller RTLO(F)-16913A x x x x
13 1650
3.50 13.22 12.31 8.64 6.11 4.43 3.23 2.29 1.95
0013GJS Fuller RTLO-18913A x x x x
13 1850
3.50 13.22 12.31 8.64 6.11 4.43 3.23 2.29 1.95
0013GHY Fuller RTO(F)-16915
x x x x
x x x 15 1650
2.17 7.73 13.14 13.31 10.20 7.88 6.07 4.77 7.83 6.00
0013GKL Fuller RTLO(F)-16918B x x x x
x x x 18 1650 3.43 4.03 12.85 15.06 14.40 12.29 8.56 7.30 6.05 5.16 4.38
0013GKM Fuller RTLO(F)-18918B x x x x
x x x 18 1850 3.43 4.03 12.85 15.06 14.40 12.29 8.56 7.30 6.05 5.16 4.38
0013GNM Fuller RTLOF-20918B x x x x x x x x x 18 2050 3.43 4.03 12.85 15.06 14.40 12.29 8.56 7.30 6.05 5.16 4.38
Chart continued on next page.