Description
Differential oil temperature sender for Kenworth T600A / T660 / T800 and Peterbilt 379 trucks. PAI 730395 replaces the genuine PACCAR / Kenworth Q21-1002 sender that mounts in the rear differential housing to drive the dash diff-temp gauge. 1/2″-14 NPT mounting thread, two-pin oval connector, 2.20″ overall length; supplied with thread sealant.
Signs You Need a New Differential Temp Sensor
- Diff-temp gauge reads pegged high or stays at zero
- Erratic or fluctuating diff-temp reading at steady highway speed
- No diff-temp warning light when housing is verified hot
- Visible damage to the sender body, connector, or pigtail
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 730395 |
| Part Type | Differential Oil Temperature Sender |
| Pin Count | 2 |
| Connector Shape | Oval |
| Thread Size | 1/2″-14 NPT (with sealant) |
| Length | 2.20 in |
Cross References
This temperature sender replaces or is equivalent to the following part numbers:
- Kenworth / PACCAR: Q21-1002, Q211002
- Stemco: S-21714, S21714
- Newstar: 505-5401, 5055401
- Alltrux: ATX21714
- Fortpro: F235380, F235449
- Also known as: 57775507
Applications
This differential oil temperature sender fits the rear differential housing on:
- Kenworth T600A (1987–2007)
- Kenworth T660 (1987–2007 production using Q21-1002 spec)
- Kenworth T800 (1987–2007)
- Peterbilt 379 (1987–2007)
Verify the existing sender thread (1/2″-14 NPT) and connector before ordering. Apply the supplied sealant or PTFE tape on installation; do not over-torque.
