{"product_id":"transmission-modulator-valve-for-ford-a4ld-1985-up-non-adjustable-single-line","title":"Transmission Modulator Valve for Ford A4LD 1985-Up, Non-Adjustable Single Line","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eTransmission Vacuum Modulator — fits Ford A4LD Automatic Transmission (1985-Up)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eDirect replacement for Ford OEM part number E5TZ-7A377-B.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eAbout This Part\u003c\/strong\u003e\nThis vacuum modulator mounts to the transmission case and uses a single vacuum line to sense engine load, adjusting transmission line pressure so the A4LD shifts firmly under acceleration and softly at light throttle. A torn or worn modulator diaphragm is a common cause of harsh, delayed, or erratic shifts, failure to reach overdrive, or a hard bang into gear.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eWatch for This Failure Symptom\u003c\/strong\u003e\nA leaking modulator diaphragm can pull transmission fluid into the engine's intake. If you see ATF in the vacuum hose, white or blue smoke from the exhaust, or a rising oil level, the modulator has failed and needs replacement.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eFits the Following (1985 and Up):\u003c\/strong\u003e\nFord Ranger\nFord Bronco II\nFord Explorer\nFord Aerostar\nFord Mustang (2.3L)\nFord Thunderbird (2.3L Turbo Coupe)\nMazda B-Series pickup\nMazda Navajo\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003ePlease confirm your exact transmission and vehicle application before ordering, as fitment can vary by year and configuration.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eDesign\u003c\/strong\u003e\nNo-stripe, single-line, non-adjustable modulator with a factory-preset calibration — no external adjustment screw or dial, simple twist-in installation. A new sealing O-ring is recommended at install and should be sourced separately.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eComplete Your Service\u003c\/strong\u003e\nPair this modulator with Lubegard ATF Protectant when refilling your transmission fluid — a trusted way to help support smoother shifts and extend transmission life after modulator replacement.\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52967136886965,"sku":"56833 MAFT","price":38.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/56833-MAFT-scaled.jpg?v=1786623704","url":"https:\/\/transpartsdirect.com\/products\/transmission-modulator-valve-for-ford-a4ld-1985-up-non-adjustable-single-line","provider":"Trans Parts Direct","version":"1.0","type":"link"}