Investigation PE87056: 1984–1987 Chevrolet C30

Status

CLOSED

Opened

Sep 8, 1987

Closed

Nov 6, 1987

Model years

1984–1987

Subject

Lower control arm failure

Component: Suspension

Summary

Summary of information from manufacturer:manufacturer is in receipt ofone complaint and five field reports.product report analysis states thelower control arm from waggoner corporation appears to have a small radiusat the transition of the side wall to the ball stud nose.current stampingsource, s.k.d., also has a small radius in the same area.s.k.d. Haschanged the trim to increase the radius to 1 inch and provide additionalstrength in the ball stud area.analysis:data indicates 38 of 40 failures involve the left control arm,39 of the vehicles are powered by the diesel engine.all failures haveoccurred at low speeds, or have been located during increased frequencymaintenance inspections.separation of the ball joint from the controlarm could cause one side of the front wheel suspension to collapse,possibly resulting in loss of vehicle control.proposed action:upgrade this pe to an ea.===

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.