Detroit DT12 Transmission for Sale

The story of this transmission

The DT12 is Detroit's own automated manual transmission, introduced in 2012 so that Daimler Truck North America could offer a complete in-house driveline in trucks such as the Freightliner Cascadia. It is a 12-speed box that shifts itself under computer control, with a clutch rather than a torque converter. This unit carries the model code DT12-1650-OH1 and came out of a 2018 truck.

Owners of Freightliner long-haul tractors, including the growing number of US-built Cascadias working in Southern Africa, like the DT12 because it keeps the engine in its best range and takes driver shifting habits out of the picture, which helps fuel and clutch life on long cross-border runs.

DT12 variants differ in ratio spread and torque rating, so the full model code on the housing tag matters more than the family name. When you fit a used unit, have the transmission control software checked and calibrated to the truck, inspect the clutch actuator and air supply, and use the correct grade of gearbox oil. Send us the tag code from your old transmission and your VIN and we will confirm the match before freight is booked.

Compatible vehicles in South Africa

Model	Years	SA variant names
Freightliner Cascadia	2018 (donor year), confirm by VIN	Detroit DT12 AMT driveline

Fitment varies with model year, sensors and mounts. Send your VIN and we will confirm before you pay.

What's included and what's not

On the pallet

Transmission as described or shown in photos
Model code checked against your old unit before dispatch
Actuators or control module only where shown (confirm on WhatsApp)

Not included

Clutch and flywheel
Transmission oil
Software calibration
Driveshaft and wiring
Fitment labour

Warranty, inspection and nationwide delivery

Warranty

Warranty cover depends on the unit's condition and make, and is confirmed in writing with your quote before you pay.
Ask us for the full warranty letter for this unit on WhatsApp.

Full warranty terms

Inspection

Checked against the DT12-1650-OH1 code before it is listed.
Inspected for play, leaks and shift quality where it can be bench-checked.
Photos and video of the unit on request.

Delivery

Crated and dispatched from Potchefstroom to all nine provinces.
Cross-border to Botswana, Namibia, Zimbabwe, Zambia, Mozambique, Lesotho, Eswatini and Malawi.
Free delivery anywhere in South Africa on orders of R50,000 and above (incl. VAT). Smaller orders and cross-border deliveries are quoted to your town before you pay.

Shipping details

FAQs

Will any DT12 fit my truck?

Not necessarily. DT12 models differ in ratios and torque rating, so we match the full code on your transmission tag, in this case DT12-1650-OH1, together with your VIN.

Does the transmission need programming?

Plan for the transmission control software to be checked and set up for your truck by a workshop with Detroit diagnostic equipment.

What warranty applies?

Warranty on truck transmissions is confirmed in writing with your quote and requires fitment by an RMI-registered workshop with new oil and a sound clutch.

Can you deliver outside South Africa?

Yes, to Botswana, Namibia, Zimbabwe, Zambia, Mozambique, Lesotho, Eswatini and Malawi, as well as anywhere in South Africa.