PACCAR Transmissions
Our precision-built transmissions are engineered from the ground up for intuitive operation and superior performance. Their intelligent features use look-ahead technology to execute shift decisions that improve fuel economy and driver comfort.
TX-12
Discover stress-free driving with the PACCAR TX-12 - the purpose-built automated transmission intuitively designed for maximum compatibility with the PACCAR Powertrain. Press play to see simplicity in action.
DISCOVER
INTEGRATION
The internal electrical system minimizes exposure and corrosion of wires and connectors, greatly reducing maintenance needs.
The PACCAR TX-12 offers the best overall gear ratio coverage with superior low-speed maneuverability.
The purpose-built automated transmission does more than fully integrate with the PACCAR MX Engines - its durable aluminum housing makes it the lightest 12-speed transmission in its class.
DESIGNED FOR THE DISTANCE
The PACCAR TX-12 seamlessly integrates with the PACCAR MX Engines and PACCAR DX-40 Axle for superior performance and driver comfort. The lightweight design and trusted dependability increase the return on your investment, no matter the distance.
| Feature | Definition |
|---|---|
| Gears | 12 Forward / 2 Reverse |
| Lower Cruise Speed Limit | 1,100 RPM |
| Torque Capacity | 1,850 lb.-ft. |
| Oil Capacity | 16 Pints |
| System Weight (Transmission, Clutch, & Oil) | 657 lb. |
| Maximum Operating Weight | 110,000 lb. |
| PTO Maximum Capacity | 8-Bolt, Bottom Mount, 95HP |
| Fluid Pressure Sensor | Protection from Gear Burnup |
| Warranty Coverage | |
| Transmission | 5 Year / 750,000 Miles |
| Clutch | 3 Years / 350,000 Miles |
| Maintenance Intervals | |
| Transmission | 750,000 Mile Oil Change |
| Clutch | Maintenance Free |
| Ratios | |
|---|---|
| 1st | 14.43 |
| 2nd | 11.05 |
| 3rd | 8.44 |
| 4th | 6.46 |
| 5th | 4.95 |
| 6th | 3.79 |
| 7th | 2.91 |
| 8th | 2.23 |
| 9th | 1.70 |
| 10th | 1.30 |
| 11th | 1.00 |
| 12th | 0.77 |
| Reverse 1 | 16.92 |
| Reverse 2 | 12.95 |
| Overall | 18.85 |
TX-8
Experience efficiency with the innovative design of the PACCAR TX-8 automatic transmission - maximizing performance, reliability and uptime
DISCOVER
INTEGRATION
Maximum gear spread combined with best gear harmonization for smoother shifts
Enables early 1st gear lock-up providing smoother shifts, faster acceleration, and improved fuel economy
The purpose-built automated transmission does more than fully integrate with the PACCAR MX Engines - its durable aluminum housing makes it the lightest 12-speed transmission in its class.
DESIGNED FOR DRIVEABILITY
Quiet-running characteristics and the responsiveness of a fine passenger car along with a whole host of features that enhance safety is what you can expect from the PACCAR TX-8.
| Feature | Definition |
|---|---|
| Gears | 8 Forward / 2 Reverse |
| Torque Capacity | 1,000 lb.-ft. |
| Oil Capacity | 4.49 GAL |
| System Weight | 328 lbs. Dry |
| Maximum Operating Weight | 57,000 lbs. |
| Maintenance Intervals | Up to 150,000 Mile Oil Change |
| PTO Summary | Definition |
|---|---|
| Mounting | 3 and 9 o' clock |
| Bolt Pattern | 8 bolt |
| Torque Output - Single | 516 LB.-FT. |
| Torque Output - Dual | 738 LB.-FT. |
| Power | Engine |
| PTO Compatibility | Chelsea 272 or Z35 |
| Warranty | Definition |
|---|---|
| Standard Warranty | Without PTO installed: 4 YRS./unlimited MI. |
| With PTO: 3 YRS./unlimited MI. | |
| 100% parts and labor (warrantable) | |
| Towing included for warrantable failures | |
| Extended Coverage Option | Available up to 5 YRS./unlimited MI. |
| Gear | Ratio |
|---|---|
| 1 | 4.89 |
| 2 | 3.12 |
| 3 | 2.03 |
| 4 | 1.64 |
| 5 | 1.25 |
| 6 | 1.00 |
| 7 | .84 |
| 8 | .64 |
| R | -4.25 |
| Total | 7.64 |
TX-18
The new PACCAR TX-18 transmission delivers productivity, efficiency, and uptime to conquer tough jobs.
HIGH PERFORMANCE MEETS RUGGED DURABILITY AND EFFICIENCY
Twin-countershaft design with helical gears and large bearings optimized for higher engine torque and weights.
Best overall gear ratio coverage with small, even steps for smooth shifts and excellent performance in all driving conditions.
Extreme duty clutch allows more controlled clutch slip and increased maneuvering time at higher loads.
ADVANCED ENGINEERING
The PACCAR TX-18 combines performance and rugged durability needed to get tough jobs done. Optimized for integration with MX Engines and ideal for on-highway high performance and light vocational applications. PACCAR also offers the TX-18 Pro which allows for on- and off-highway high performance, severe service, and heavy vocational needs.
| Feature | Definition |
|---|---|
| Gears |
18 Forward/1-6 Reverse |
| Max. Horsepower | 510 HP |
| Torque Capacity | 1,850 lb.-ft. |
| Maximum Operating Weight | 140,000 lbs. |
| Oil Capacity | 25.4 PINTS1 |
| System Weight (transmission, clutch, and oil) | 808 LBS (TX-18) 813 LBS (TX-18 PRO) |
| PTO Max Capacity | 8-BOLT, BOTTOM MOUNT; 4-BOLT REAR MOUNT - COMBINED 160 HP |
| Fluid Pressure Sensor | PROTECTION FROM GEAR BURNUP |
| Maintenance Intervals | ON-HIGHWAY: 500,000 MI/5 YRS VOCATIONAL: 250,000 MI/3 YRS CLUTCH: MAINTENANCE FREE |
1 For coolerless, non-PTO configuration
2 TX-18 Pro Only
Note: Some features and specifications not available with all configurations.
| Warranty | Definition |
|---|---|
| Linehaul | 5 YRS/750,000 MILES |
| Standard (Construction, Pickup & Delivery) | 3 YRS/300,000 MILES |
| Severe Duty (Pro only) | 2 YRS/UNLIMITED MILES |
| Ratios | |
|---|---|
| 1st | 14.32 |
| 2nd | 11.96 |
| 3rd | 10.02 |
| 4th | 8.43 |
| 5th | 7.04 |
| 6th | 5.9 |
| 7th | 4.95 |
| 8th | 4.13 |
| 9th | 3.46 |
| 10th | 2.89 |
| 11th | 2.41 |
| 12th | 2.02 |
| 13th | 1.7 |
| 14th | 1.42 |
| 15th | 1.19 |
| 16th | 1 |
| 17th | 0.83 |
| 18th | 0.7 |
| R1 | 15.25 |
| R2 | 12.73 |
| R3 | 10.67 |
| R42 | 3.08 |
| R52 | 2.57 |
| R62 | 2.15 |
| OVERALL | 20.46 |