2 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 - 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.)