OEM Allison HD4060P Transmission Hydraulic Retarder Accumulator
Allison Part No: 29522225
Serial No: SBB30024
Retarder Valve Part No: 29522717
Solenoid Part No: 258658-001
12DC FT 2595
Capacity: .60 Liters
Max Operating Pressure: 1862 kpa
OEM Allison Transmission Hydraulic Retarder Accumulator, Part# 29522225, Model# A4X0037X257S. Removed from a good, running Allison HD4060P transmission — not pulled from a failed or wrecked unit. Shows normal signs of use consistent with age, no damage, cracks, or leaks noted at removal. Fits: Allison HD4060P and HD/B500 series transmissions. Please verify PN match against your unit before purchasing — this is an older-generation accumulator assembly, so confirm fitment for your specific build/software generation.
SHIPS FAST:
Small, light part — ships same or next business day via UPS/FedEx
Ground in a padded box.
Local pickup available in the Sacramento, CA area.
