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.


Experience efficiency with the innovative design of the PACCAR TX-8 automatic transmission – maximizing performance, reliability and uptime.

Opinions That Matter

“There are no rough shifts. It’s smooth as a car or better. Without looking at the tachometer, it’s hard to tell the transmission is shifting.”

Discover Integration

8-speed Gear Layout

Maximum gear spread combined with best gear harmonization for smoother shifts

Twin Torsional Damper

Enables early 1st gear lock-up providing smoother shifts, faster acceleration, and improved fuel economy

Low Total Cost of Ownership

Fewer moving parts, reduced friction, and no external parts

Select each spot to learn more.

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

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