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![AT545 [80-UP] Automatic Transmission Modulator Allison NEW MT640 MT643](http://remco-transmission-parts.com/cdn/shop/files/X_e03a4b46-2316-4e60-9469-5730b6e88f58.jpg?v=1761753084&width=1)
![AT545 [80-UP] Automatic Transmission Modulator Allison NEW MT640 MT643](http://remco-transmission-parts.com/cdn/shop/files/X_e03a4b46-2316-4e60-9469-5730b6e88f58.jpg?v=1761753084&width=600)
AT545 [80-UP] Automatic Transmission Modulator Allison NEW MT640 MT643
$237.34
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, hunting between gears, or a...