Defect Investigation Detail
PONTIAC / PARISIENNE / 1985
| Components - Details | |
|---|---|
| NHTSA Action Number: PE87038 | Vehicale/Equipment Name: PONTIAC |
| Vehicale/Equipment Model: PARISIENNE | Vehicale/Equipment Year: 1985 |
| Component Name: STEERING | Manufacturer's Name: General Motors, LLC |
| Date Opened: Jul, 09 1987 | Date Closed: Jan, 28 1988 |
| Subject: HYDROBOOST FAILURE | Summary: Subject vehicles:caprice, caprice classic, custom cruiser, deville,electra, estate wagon, fleetwood, lesabre, ninety-eight, parisienne,park avenue.(all 1984-86 gm vehicles equipped with hydroboost ii systems)analysis:consumer complaints allege several problems involving the powersteering and power brake systems of these vehicles.these problemsinclude: power steering fluid loss, power brake fluid loss, leakage fromthe hydro-boost ii power brake booster, broken booster seals, and mastercylinder failure.all problems seem to be related to the hydro-boost iipower assist system, in which the working fluid provides power assist to boke booster.the effect of these problems could be a loss of steeringcontrol and/or brake effectiveness.status:the voluminous amount of data supplied by gm is presently being coded by a contractor and should be completed by 12/30/87. gm data indicated a 50% weibull distribution failure at 50k miles for the piston push-rod seal. this pe looks to have an extrodinarily high frequency, although the severity apears to be low.should be interesting discussing this for upgrade/closure.=== |