MTC Automatic Transmission Overdrive Solenoid
MTC Overdrive Solenoids for Classic Volvo Transmissions
The overdrive solenoid is a small electrical component with a big job. It controls hydraulic flow that engages overdrive in the transmission, so when it fails, a car can lose its top gear, run higher engine rpm on the highway and use more fuel. MTC's Automatic Transmission Overdrive Solenoid focuses on the rear-wheel-drive Volvo models that depend on this part, giving owners of older sedans and wagons a dedicated replacement.
The MTC VM292 Overdrive Solenoid
The MTC VM292 is built as a replacement for OE number 1239928 (also cross-referenced to 1239679) and is listed for Volvo 240, 740, 760, 780 and 940 applications. Fitment data for the 1993-1995 Volvo 940, in both naturally aspirated and turbocharged 2.3L four-cylinder form, shows the solenoid supplied with inner and outer O-rings, with one required per vehicle.
Having the seals included matters in this repair. The solenoid mounts on the top left side of the transmission pan flange area, just behind the shift linkage on AW70 and AW71 transmissions, and its O-rings should be replaced any time the solenoid is removed. Fitting new seals together with the new solenoid helps prevent fluid seepage and pressure loss at the mounting point.
Signs It May Be Time to Replace the Solenoid
- Overdrive no longer engages, or engages intermittently
- Engine rpm at highway speed is noticeably higher than it used to be
- The overdrive switch on the shifter has no effect
- Fluid weeping around the solenoid body or pan flange area
Before replacing the part, check the wiring and connector, since a damaged lead can mimic a failed solenoid. Make sure the harness routes cleanly away from the transmission case so the wire is not pinched or stressed.
About the Brand Behind the Part
MTC is the flagship name of Mission Trading Company in Livermore, California. The company started as an automotive repair shop in 1979 and began manufacturing in 1984 to help keep costs down for customers. That repair-shop background shows in a part like the VM292, which targets a specific, well-known wear item on a long-lived generation of Volvos. MTC states that it adheres to AAIA and OEM specifications. You can learn more about the full range on the MTC brand page.
Shopping Tips
Match the part to your transmission and model year, and confirm the OE number against your existing solenoid. If you are comparing options, browse the full Automatic Transmission Overdrive Solenoid category to see how different designs and applications stack up. While you are working in the pan area, it is a good opportunity to inspect the transmission fluid condition and check nearby seals and connectors.