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Standard Ignition TM-49 Automatic Transmission Vacuum Modulator
| Brand | Standard Ignition TM-49 |
|---|---|
| Part Finish | Brass |
| Fits | Chevrolet, Suzuki, Geo, GMC, and Pontiac · 33 vehicles |
Performance-calibrated. Matches transmission shift points to engine load.
Nylon-reinforced diaphragm. Delivers durable, tear-proof operation.
Brass finish. Provides a corrosion-resistant exterior.
Cross-references 7R1011, 57-7033 and 067-0115 for the same application. See all 11.
Automatic Transmission Vacuum Modulator for GM and Suzuki
The Standard Ignition TM-49 automatic transmission vacuum modulator is built to help match shift timing to engine load for smoother automatic transmission operation. It uses a nylon-reinforced diaphragm for durability and high-temperature oil seals for a secure, leak-resistant fit.
Compatible with select Chevrolet Tracker, Suzuki Sidekick, Geo Tracker, Chevrolet Chevette, Chevrolet S10 Blazer, GMC S15, GMC S15 Jimmy, and Pontiac T1000 applications, this TM-49 modulator is a direct-fit service part for vehicles that use a vacuum-controlled automatic transmission setup.
Key Features
- Performance-calibrated to help align transmission shift points with engine load
- Nylon-reinforced diaphragm for tear-resistant operation
- High-temperature oil seals for proper sealing and leak control
- Brass finish
- 1 hose connector for vacuum line connection
- 100% end-of-line tested for functional verification
Detailed Description
Standard Ignition TM-49 is an automatic transmission vacuum modulator designed for vehicles that rely on vacuum signal input to influence shift behavior. By responding to engine load, it helps the transmission shift at the appropriate time under varying driving conditions. This part number TM-49 is commonly searched for Chevrolet Tracker and Suzuki Sidekick service, as well as Geo Tracker and other GM compact truck and car applications.
This part cross-references 7R1011 and 57-7033 for the same application.
What It Helps Solve
- Harsh or delayed automatic transmission shifts
- Shift timing that does not match engine load
- Vacuum leaks at the modulator connection
- Diaphragm wear in the transmission vacuum modulator
- Driveability issues related to incorrect modulator response
Installation Notes and Tips
Verify the vehicle uses a vacuum-operated automatic transmission modulator before ordering. Inspect the vacuum hose, fittings, and transmission vacuum line for cracks or leaks during replacement. Confirm the replacement TM-49 matches the original connector style and mounting location on the transmission case.
Quality Assurance
Standard Ignition validates each TM-49 with 100% end-of-line testing to confirm performance before release. The reinforced diaphragm and high-temperature seals are selected to support durable, leak-resistant operation in transmission service.
Fitment
- Fits 1998-1999 Chevrolet Tracker, N/A
- Fits 1990-1998 Suzuki Sidekick, N/A
- Fits 1996-1997 Geo Tracker, N/A
- Fits 1980-1987 Chevrolet Chevette, N/A
- Fits 1987 Chevrolet S10 Blazer, N/A
- Fits 1987 GMC S15, N/A
- Fits 1987 GMC S15 Jimmy, N/A
- Fits 1982-1987 Pontiac T1000, N/A
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1999 | Chevrolet | Tracker | — | 1.6L | L4 | N/A | — |
| 1998 | Chevrolet | Tracker | — | 1.6L | L4 | N/A | — |
| 1998 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1997 | Geo | Tracker | — | 1.6L | L4 | N/A | — |
| 1997 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1996 | Geo | Tracker | — | 1.6L | L4 | N/A | — |
| 1996 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1995 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1994 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1993 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1992 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1991 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1990 | Suzuki | Sidekick | Automatic | 1.6L | L4 | N/A | — |
| 1987 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1987 | Chevrolet | S10 Blazer | — | 2.5L | L4 | N/A | — |
| 1987 | Chevrolet | S10 Blazer | — | 2.8L | V6 | N/A | — |
| 1987 | GMC | S15 | — | 2.5L | L4 | N/A | — |
| 1987 | GMC | S15 | — | 2.8L | V6 | N/A | — |
| 1987 | GMC | S15 Jimmy | — | 2.5L | L4 | N/A | — |
| 1987 | GMC | S15 Jimmy | — | 2.8L | V6 | N/A | — |
| 1987 | Pontiac | T1000 | — | 1.6L | L4 | N/A | — |
| 1986 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1986 | Pontiac | T1000 | — | 1.6L | L4 | N/A | — |
| 1985 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1985 | Pontiac | T1000 | — | 1.6L | L4 | N/A | — |
| 1984 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1984 | Pontiac | T1000 | — | 1.6L | L4 | N/A | — |
| 1983 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1983 | Pontiac | T1000 | — | 1.6L | L4 | N/A | — |
| 1982 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1982 | Pontiac | T1000 | — | 1.6L | L4 | N/A | — |
| 1981 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
| 1980 | Chevrolet | Chevette | — | 1.6L | L4 | N/A | — |
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