Allison Power Train: Park/Neutral Start Interlock Switch

Allison is recalling about 3,250 vehicles over a problem with the power train. If vehicle engine is started with the transmissionselector in a drive position without service or parking brakes applied, thevehicle will move as soon as the engine starts and could result in a vehiclecrash without prior warning.

Campaign
91E029000
Manufacturer
GENERAL MOTORS CORP.
Reported
12 August 1991
Vehicles
3,250
Built between
Apr 1991 – Jun 1991
Models
1
Recall type
Equipment
Initiated by
Manufacturer
Owners notified
1 September 1991
Repaired
Not reported
Unrepaired
Not reported

Does this affect my vehicle?

This recall covers vehicles built between April 1991 and June 1991. If yours was built outside that window, it is not part of this recall.

  • Allison TransmissionBuilt April 1991 to June 1991

What the defect is

An incorrect neutral start switch was installed on some transmissions which allows the truck to be started in a drive position.

What could happen

If vehicle engine is started with the transmissionselector in a drive position without service or parking brakes applied, thevehicle will move as soon as the engine starts and could result in a vehiclecrash without prior warning.

What gets fixed

REPLACE THE NEUTRAL START SWITCH IF DETERMINED THAT THE INCORRECT TYPE OF SWITCH WAS INSTALLED.

Timeline

  1. Vehicles builtApril 1991 to June 1991
  2. Recall reported to NHTSA12 August 1991
  3. Owners notified1 September 1991

Your rights

A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.

That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 12 August 1991.

To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.

Official source

Recalling manufacturer
GENERAL MOTORS CORP.
Recall initiated by
MFR

Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.

Additional notes

System: automatic transmissions.equipment description: allison automatic transmissions: AT500, MT600, V730,HT700, or CLBT700 for various heavy duty vehicles.

Check your own vehicle

This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.

A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.

Same component

Same brand