The Mack T313L21 is a manual truck transmission. It lets the driver pick the gear pair that matches load and road speed, carrying engine torque through the countershaft gears to the mainshaft.
To make sure you order the correct unit, read the data stamped into the case on the driver's side (left side), above the 8 bolt PTO cover. Call Pro Gear and Transmission with that information and we will confirm proper fit for your application.
A refundable core charge of $4,500.00 applies to this item and will be collected at checkout. The core charge is refunded upon receipt of your returned core, subject to its condition; customer is responsible for return shipping. Call us at (877) 776-4600 for details.
Features
Mack model T313L21
Manual truck transmission
Data stamped into the case on the driver's side (left side), above the 8 bolt PTO cover
Grinding on shifts and growing gearbox noise are the usual signs of internal wear
