Transmission Parts Allison AT-540 Series Valve Body Valve / Sleeve
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AT-540 Series

Reduced Modulation Modification Kit
Part No. S29537879

AT-545 beginning with serial #3210302450

OE Part No. 29537879

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Sonnax reduced modulation modification kit S29537879 for the Allison® AT-540 series transmission, reduces shift quality concerns and increases durability equipped with electric modulators. This modification reduces the effect of modulator pressure during the 2-3 and 3-4 range shifts.

  • Valves (2)
  • Sleeves (2)
  • AT-540 Series Reduced Modulation Modification Kit S29537879
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