OEM Allison Transmission 12 Volt 6 Relay Control Module
Allison Part No: 29509886
Serial No: H026858
12 Volt 6 Relay
This is the OEM 12-volt, 6-relay control module (also referred to as a VIM — Vehicle Interface Module) used with Allison's HD4560P/2500RDS/2200HS transmission lineup. Commonly needed when the original module fails and causes harsh/delayed shifting, gear slipping, or no-shift conditions. Direct fit replacement for part number 29509886 and its cross-reference numbers listed above.
Condition: Good used, pulled from a working unit with 55k Miles
VERIFY FITMENT BEFORE YOU BUY
Electronic control modules are application-specific. Please match the part number and software/calibration number on your existing module to the photos before purchasing. Not sure? Message us your equipment make, model, serial number, and a photo of your old module's label. We'll confirm fitment before you buy.
What's included / not included
Module exactly as pictured
✘ Programming, flashing, or parameter setup. This may be required for your VIN or equipment and is the buyer's responsibility.
✘ Harness, connectors, or mounting hardware unless pictured
Protect your purchase
Have a qualified technician check wiring, power, and grounds before installing. Electrical faults can damage any module, new or used.
Returns
Because these are tested, programmable electronics, we do not accept returns for: ordering the wrong part, change of mind, programming or compatibility issues, or damage from installation. Each unit is serialized and sealed. Returns with a different serial number, broken seals, or signs of installation will not be accepted. If you have a problem, message us first. We respond within 24 hours and will make it right.
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.
