OE Quality
60-Day Returns

Four Seasons 77545 A/C Compressor
Reliable A/C Compressor for Dodge Ram and B-Series Vans
The Four Seasons Reman Compressor 77545 is designed to restore your vehicle's air conditioning system performance. Engineered for Dodge B1500, B2500, B3500, Ram 1500 Van, Ram 2500 Van, and Ram 3500 Van models, this remanufactured A/C compressor ensures compatibility and efficient cooling with R134a refrigerant.
- Compatible with R134a refrigerant and Pag 46 oil
- Includes clutch and heat switch for seamless operation
- 7-groove serpentine pulley with 3.75-inch diameter
- 12-volt coil with 1 wire lead for easy electrical connection
- Tangent mount type with precise mounting distance of 48 mm
- Sealing washer type suction and discharge ports with included O-rings
- Remanufactured Sanden/Sankyo TRF105 compressor type
Four Seasons Reman Compressor Product Line
The Reman Compressor line by Four Seasons offers remanufactured components that meet strict quality standards to provide reliable HVAC performance. This product line focuses on restoring compressors to factory specifications, including essential parts like clutches and switches, ensuring compatibility with original equipment refrigerants and oils. The 77545 model exemplifies this approach by delivering a remanufactured compressor tailored for specific Dodge Ram and B-Series van applications.
Detailed Product Description
The Four Seasons 77545 A/C compressor is a remanufactured unit designed for Dodge B1500, B2500, B3500, and Ram 1500, 2500, and 3500 Vans. It operates with R134a refrigerant and is compatible with Pag 46 oil, which is included to maintain proper lubrication. The compressor features a 7-groove serpentine pulley with a 3.75-inch diameter, ensuring proper belt alignment and drive efficiency. The clutch assembly is included, with a maximum diameter of 3.75 inches and a 1.90625-inch distance from clutch to mounting flange, facilitating straightforward installation. The coil operates at 12 volts with a single wire lead, and the heat switch is included to protect the system from overheating. Both suction and discharge ports use sealing washers with included O-rings for secure, leak-free connections. The tangent mount type with a 48 mm mount distance ensures precise fitment in the specified Dodge models.
Common Applications and Issues Addressed
- Restores A/C cooling performance in Dodge Ram 1500 and B-Series vans
- Replaces failing or noisy compressors in Ram 2500 and 3500 Vans
- Solves clutch engagement problems with included clutch assembly
- Addresses refrigerant leaks with sealing washer ports and O-rings
- Improves system reliability by replacing worn or damaged compressors
Installation Notes and Tips
- Ensure compatibility with Dodge B1500, B2500, B3500, Ram 1500, 2500, and 3500 Vans before installation
- Use Pag 46 oil as specified for optimal lubrication
- Verify the serpentine belt condition and replace if worn
- Check electrical connections for the 12-volt coil and heat switch
- Replace mounting hardware if necessary, as it is not included
Quality Assurance and Warranty
This Four Seasons Reman Compressor 77545 is remanufactured to meet or exceed OEM standards for performance and durability. It includes essential components such as the clutch and heat switch to ensure proper operation. While mounting hardware is not included, the compressor comes with sealing washers and O-rings to maintain system integrity. Warranty details vary by distributor but typically cover defects in materials and workmanship.
| Brand | Four Seasons |
|---|---|
| Part Number | 77545 |
| Position | Reman Compressor |
| Clutch Included | Included |
| Clutch Maximum Diameter | 3.750 |
| Coil Clock Position | 1 Wire Lead |
| Coil Voltage | 12 |
| Compatible Refrigerant Oil Type | PAG 46 |
| Compressor Type | TRF105 |
| Discharge Port Type | Sealing Washer |
| Distance From Clutch To Mounting Flange | 1.90625 |
| Mount Distance MM | 48.000 |
| Mounting Hardware? | Not Included |
| Mounting Type | Tangent Mount |
| New or Reman | Remanufactured |
| O-Ring A Number/Desc | [24355] / Sealing Washer |
| O-Ring B Number/Desc | [24354] / Sealing Washer |
| Oil Filled | Included |
| Pulley Belt Type | Serpentine |
| Pulley Diameter MM | 95.250 |
| Pulley Groove Quantity | 7 |
| Pulley Lip Diameter | 3.750 |
| Pulley Ridge Diameter | 3.750 |
| Refrigerant Type | R134a |
| Suction Port Type | Sealing Washer |
| Switch Included | Heat Switch |
| Switch Type | Heat Switch |
| Terminal Type | Pin |
| Type | Sanden/Sankyo |
This part fits 21 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2003 | Dodge | Ram 1500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2003 | Dodge | Ram 2500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2003 | Dodge | Ram 3500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2002 | Dodge | Ram 1500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2002 | Dodge | Ram 2500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2002 | Dodge | Ram 3500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2001 | Dodge | Ram 1500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2001 | Dodge | Ram 2500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2001 | Dodge | Ram 3500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2000 | Dodge | Ram 1500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2000 | Dodge | Ram 2500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 2000 | Dodge | Ram 3500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1999 | Dodge | Ram 1500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1999 | Dodge | Ram 2500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1999 | Dodge | Ram 3500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1998 | Dodge | B1500 | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1998 | Dodge | B2500 | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1998 | Dodge | B3500 | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1998 | Dodge | Ram 1500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1998 | Dodge | Ram 2500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
| 1998 | Dodge | Ram 3500 Van | N/A | w/ TRF105 Compressor; Reman w/ Clutch; Reman Compressor |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.