A failed vacuum modulator on a C4 or C5 automatic transmission shows up fast: delayed upshifts, early upshifts, or shifts so harsh the driver notices every one. This is the screw-in vacuum modulator with white stripe calibration, covering C4 and C5 units built from 1964 through 1972, sold as a single replacement piece.
The white stripe on this modulator is not cosmetic. Modulators for these units were produced in different calibrations to match different engine vacuum curves, and the stripe is the field identifier that tells you which calibration you have. Installing the wrong calibration puts shift points back out of spec even with a brand-new part, so matching the stripe on the stock unit matters before you order.
This is a screw-in type. C4 and C5 cases from this era were built with either a screw-in port or a push-in port depending on production date and application. If your case uses a push-in modulator, this piece will not fit. Check the case port before purchasing.
At REMCO, which has worked in automatic transmission parts since 1991, every order is packed by hand and checked against its part listing before it ships. A packing list is included in the box so you can confirm what arrived matches what was ordered. For a single-piece order like this one, that means one modulator, screw-in, white stripe, 0.2 lb, ready to install.
Confirm the transmission code, the production year, and the modulator port style on your unit before placing the order. Those three checks are all it takes to make sure this part is the right one for the job.
- Restores proper shift timing and helps avoid erratic or harsh shifts caused by a failed or out-of-spec vacuum modulator on C4 and C5 units.
- This listing covers the modulator only. No Automatic Transmission Filter, no gaskets, no seals, and no additional hardware are included. Confirm this is the only part you need before ordering.
- Screw-in design with white stripe identification makes fitment straightforward: the stripe coding distinguishes this calibration from other modulator variants used across the same transmission family.
- Single vacuum modulator unit, screw-in type, white stripe marking. Weighs 0.2 lb. One piece per order, no additional components.
- Before ordering, verify your unit is a C4 or C5 and that it was built between 1964 and 1972. Also confirm the modulator port on your case accepts a screw-in fitting, not a push-in type.
What's in the box
- 1 x Vacuum Modulator, C4 White Stripes [Screw In] 72
Compatible vehicles
- Fits Mustang [64-69], Torino [68-69], Cougar [68-69], Montego [68-69], Fairlane 500 [68-69], Fairmont [78-80], Falcon [70], Galaxie 500 [70-74], Gran Torino [72-76], Granada [75-80], LTD [75-80], Maverick [69-77].
| modulator c-4 white stripes (screw in) 1964-72 Automatic transmission |
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