Standard Ignition TM-29 Automatic Transmission Vacuum Modulator

Automatic Transmission Vacuum Modulator for Ford and Mercury

Standard Ignition TM-29 is an automatic transmission vacuum modulator built for Ford and Mercury applications that use a vacuum-controlled shift strategy. It helps match transmission shift timing to engine load for smoother operation and more consistent drivability.

• Performance-calibrated to align shift points with engine load
• Nylon-reinforced diaphragm for durability and tear resistance
• High-temperature oil seals for a secure, leak-resistant fit
• 100% end-of-line tested for performance validation
• Direct replacement for select Ford and Mercury automatic transmission vacuum modulator applications

Fitment and Cross References

Compatible with select Ford F-150, Ford Mustang, Ford Thunderbird, Mercury Cougar, and Mercury Capri applications across 1970-1986 model years. This part cross-references 7R1024 and TM731 for the same application.

• Fits 1984-1986 Ford F-150, N/A
• Fits 1982-1985 Ford Escort, N/A, w/o High Altitude Emissions; w/ Yellow Stripe
• Fits 1983-1985 Ford Mustang, N/A, w/o High Altitude Emissions; w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1984-1985 Ford Tempo, N/A, w/o High Altitude Emissions; w/ Yellow Stripe
• Fits 1985 Ford Thunderbird, N/A, w/o High Altitude Emissions; w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1982-1983 Ford Thunderbird, N/A, w/o High Altitude Emissions; w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1983-1985 Mercury Capri, N/A, w/o High Altitude Emissions; w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1982-1985 Mercury Cougar, N/A, w/o High Altitude Emissions; w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1982-1985 Mercury Lynx, N/A, w/o High Altitude Emissions; w/ Yellow Stripe
• Fits 1984-1985 Mercury Topaz, N/A, w/o High Altitude Emissions
• Fits 1983-1984 Ford Mustang, N/A, w/ Yellow Stripe
• Fits 1983-1984 Ford Thunderbird, N/A, w/ Yellow Stripe
• Fits 1978-1979 Ford Thunderbird, N/A, w/ Yellow Stripe
• Fits 1982-1984 Mercury Capri, N/A, w/ Yellow Stripe
• Fits 1983-1984 Mercury Cougar, N/A, w/ Yellow Stripe
• Fits 1983-1984 Mercury Marquis, N/A, w/ Yellow Stripe
• Fits 1980 Mercury Marquis, N/A, w/ Yellow Stripe
• Fits 1982-1983 Mercury LN7, N/A, w/o High Altitude Emissions; w/ Yellow Stripe
• Fits 1981 Ford Thunderbird, N/A, w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1978-1980 Ford LTD, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1980 Ford LTD, N/A, w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1978-1980 Ford Thunderbird, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1980 Mercury Grand Marquis, N/A, w/ Yellow Stripe
• Fits 1980 Mercury Monarch, N/A, w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1976-1977 Mercury Monarch, N/A, w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1979-1980 Mercury Monarch, N/A
• Fits 1978-1979 Ford Fairmont, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1979 Ford Mustang, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1979 Mercury Capri, N/A, Automatic Transmission Vacuum Modulator for Model XP Trans
• Fits 1977-1979 Mercury Cougar, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1978-1979 Mercury Zephyr, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1977-1978 Ford F-100, N/A, w/ Yellow Stripe
• Fits 1978 Ford F-250, N/A, w/ Yellow Stripe
• Fits 1973-1977 Ford Bronco, N/A
• Fits 1977 Ford E-100 Econoline, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1977 Ford E-100 Econoline Club Wagon, N/A, w/ Yellow Stripe; w/ 1 Vacuum Port; Model XP Trans.
• Fits 1977 Ford E-150 Econoline, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1976-1977 Ford E-150 Econoline Club Wagon, N/A, w/ Yellow Stripe; w/ 1 Vacuum Port; Model XP Trans.
• Fits 1977 Ford LTD, N/A, Automatic Transmission Vacuum Modulator for Model XP Trans
• Fits 1976 Ford E-100 Econoline, N/A, w/ Yellow Stripe; w/ Sliding Door
• Fits 1976 Ford E-100 Econoline Club Wagon, N/A, w/ Yellow Stripe; Push-In Type; Model XP Trans.
• Fits 1976 Ford E-150 Econoline, N/A, w/ Yellow Stripe; Model XP Trans.; w/ Sliding Door
• Fits 1976 Ford F-100, N/A, Push-In Type
• Fits 1975-1976 Ford F-150, N/A, w/ Single Diaphragm; w/ PEA-3W Trans.
• Fits 1975-1976 Ford F-250, N/A, w/ Single Diaphragm
• Fits 1976 Mercury Bobcat, N/A, w/ Yellow Stripe; Model XP Trans.
• Fits 1976 Mercury Monarch, N/A, Automatic Transmission Vacuum Modulator for Model XP Trans
• Fits 1975 Ford E-100 Econoline, N/A, w/ 1 Vacuum Port; Model XP Trans.
• Fits 1973-1975 Ford E-100 Econoline, N/A, w/ Single Diaphragm
• Fits 1975 Ford E-150 Econoline, N/A, w/ Single Diaphragm
• Fits 1975 Ford E-250 Econoline, N/A, w/ Single Diaphragm
• Fits 1975 Ford F-100, N/A, Push-In Type; Model XP Trans.
• Fits 1972 Ford F-100, N/A, Push-In Type; Model XP Trans.
• Fits 1975 Ford F-250, N/A, Push-In Type
• Fits 1975 Mercury Monarch, N/A, w/ 1 Vacuum Port
• Fits 1975 Mercury Montego, N/A, w/ 1 Vacuum Port; Model XP Trans.
• Fits 1973-1974 Ford E-100 Econoline, N/A, w/ 1 Vacuum Port
• Fits 1972-1974 Ford F-250, N/A, Push-In Type; Model XP Trans.
• Fits 1974 Ford Pinto, N/A, w/ Yellow Stripe; w/ Single Diaphragm
• Fits 1972-1973 Ford Mustang, N/A, Push-In Type; Model XP Trans.
• Fits 1972 Ford E-100 Econoline, N/A, w/ Single Diaphragm; w/ Push-In Type
• Fits 1972 Ford F-350, N/A, Push-In Type; Model XP Trans.
• Fits 1972 Ford LTD, N/A, Push-In Type; Model XP Trans.
• Fits 1971-1972 Ford Pinto, N/A, Push-In Type
• Fits 1972 Mercury Cougar, N/A, w/ Push-In Type; Model XP Trans.
• Fits 1972 Mercury Montego, N/A, w/ Push-In Type
• Fits 1970-1971 Ford LTD, N/A, Push-In Type

Common Repair Uses

• Corrects delayed or inconsistent automatic transmission shift timing
• Addresses vacuum leaks at the modulator diaphragm or seals
• Helps restore proper transmission response under changing engine load
• Replaces a worn modulator on Ford F-150, Mustang, Thunderbird, and Mercury Cougar applications

Installation Notes and Quality

Verify the transmission style, vacuum port configuration, and application notes such as Yellow Stripe, Single Diaphragm, Push-In Type, or Model XP Trans. before installation. Standard Ignition TM-29 is 100% end-of-line tested to confirm performance before it leaves the factory.