Rostra 630003

Rostra 630003 is a vehicle speed sensor / transmission speed sensor. It provides a VSS signal to the transmission controller or vehicle harness, depending on control-system design.

Application / fitment

Part number 630003 belongs to the speed-sensor group for selected heavy-duty Allison automatic transmissions. Fitment should be checked by transmission model, retarder equipment, sensor location in the case and matching OE number.

• part type: vehicle speed sensor / VSS
• position: internal sensor or shaft sensor in the transmission case, depending on transmission version
• selected technical applications: Allison B500 and HD 4000 Series with retarder
• catalogue cross-reference: OE 29543435; Rostra 50-1023 as a publicly listed equivalent in this VSS group

Lubricate the O-ring with ATF, seat the sensor squarely and check that the bore is clean. After installation, clear fault codes and verify the speed reading in live data.

Technical information

• type: internal VSS / vehicle speed sensor
• connector: 2-pin
• mounting features: O-ring, mounting bracket and sensing tip installed in the transmission case
• signal: shaft or vehicle speed depending on transmission control strategy
• sale unit: 1 piece