4 recalls found. |
DEFECT #1 - POWER TRAIN:AUTOMATIC TRANSMISSION
Posted on: 1979-10-12
Description
Consequence
Corrective Action
Notes
Chevrolet campaign no 75-c-09.gmc campaign no 75-c-07.equipped with mt-65allison transmission matched with 366 or 427 cid v-8 engine.heavy dutytrucks.possibility that during the corrective action to eliminate the defectcovered in recall campaign 74-0226.november 18, 1974, the governor assemblywas reworked to replace the nylon driven gear with a bronze driven gear.ithas been determined that as a result of this rework, nylon chips of sufficientsize may have been left in the governor assembly, which could plug the governorvalve oil port.if this occurs, it could cause transmission components tobreak and flying fragments could result in personal injury.(correct byinspecting and replacing complete governor assembly with one containing bronzedriven gear.)
DEFECT #2 - STEERING:HYDRAULIC POWER ASSIST SYSTEM
Posted on: 1979-10-12
Description
Consequence
Corrective Action
Notes
Chevrolet campaign no 74-c-18.trucks.possibility that the bolts attachingthe power steering cylinder anchor bracket to the frame rail may have beenassembled with fasteners which were not sufficiently tightened or which werethe wrong type.if the vehicle is operated with bolts in this condition, it ispossible for the attaching bolts to shear, detaching the cylinder from theframe rail.the detached cylinder could wedge between the drag links and frontspring causing steering lockup or possibly sever front brake hose causing lossof vehicle braking.(correct by inspecting and replacing anchor bracket bolts,washers and nuts.)
DEFECT #3 - SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
Posted on: 1979-10-12
Description
Consequence
Corrective Action
Notes
Chevrolet campaign no 73-c-11, gmc campaign no 73-c-19.medium dutyconventional trucks with 366 or 427 v-8 engine and hydraulic brakes.possibility that the left front hydraulic brake line may be improperly routedand may contact the power steering pump housing.if this condtion exists ahole could be worn in the brake line causing a loss of brake fluid and brakingcontrol.(correct by inspecting and properly routing brake line wherenecessary.)
DEFECT #4 - POWER TRAIN:AUTOMATIC TRANSMISSION:PARK/NEUTRAL START SWITCH
Posted on: 1979-10-12
Description
Consequence
Corrective Action
Notes
Chevrolet campaign no 74-c-19.possibility when the allison mt-650transmission is matched with either the 366 or 427 cid v-8 engines, the 1,3 to1,0 governor drive-to-driven gear ration can create excessive governor rpm whenoperated in top gear at or near maximum rated engine speed rpm of 4000.theexcessive governor speed can result in a governor driven gear failure.afailure of this type can cause a down shift of the transmission withoutwarning.if this occurs, transmission and engine speed would increase greatlyand may result in one of these components breaking.(correct by inspecting andinstalling new transmission rear housing assembly and governor with 1.0 to 1.0 drive-to-driven ratio.)