AT540 AT542 AT543 AT545 Electronic Modulator Automatic Transmission [80-UP]

REMCO TRANSMISSION PARTS Verified independent store

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Replacing a worn or failed electronic modulator is one of the more direct fixes available when an AT540-series automatic transmission begins showing inconsistent shift points, hunt ing between gears, or a complete loss of modulated line pressure response. This is a single modulator unit, sourced and handled individually, not a kit and not a multi-part package.The part covers four related models: AT540, AT542, AT543, and AT545, all from 1980 forward. Because these four share a common family architecture, it is still important to confirm the exact code on your unit before ordering. Small internal differences between variants exist, and ordering by transmission code rather than by application or year alone is the most reliable way to avoid a mismatch.This modulator is not bundled with gaskets, seals, solenoids, filter, clutch packs, or any rebuild hardware. If your job calls for those components, they need to be sourced separately. Buying exactly what the repair requires, rather than a broader kit that may include parts you do not need, keeps the work straightforward.At our facility we have worked exclusively with automatic transmission components since 1991. Each unit is checked before it ships, and the shipping weight for this modulator is 4 lb. If you have the transmission code confirmed and need this specific modulator for an AT540, AT542, AT543, or AT545, this listing covers that need directly. Restore accurate shift behavior by replacing a failed electronic modulator that causes erratic, harsh, or delayed gear changes in AT540-series units. This listing covers a single electronic modulator only. No gaskets, seals, solenoids, or additional hardware are included. Verify all other parts before ordering. Built for AT540-series automatic transmissions, this modulator is handled and checked individually before it leaves our facility. One (1) electronic modulator unit. Shipping weight: 4 lb. Intended for AT540, AT542, AT543, and AT545 transmission models, 1980 and up. Before ordering, confirm the exact transmission code stamped on the unit, the production year, and the application it comes from. AT540, AT542, AT543, and AT545 are not interchangeable with other families. Show more