HARSH 1-2 UPSHIFT AT NORMAL SHIFT POINT - JATCO AUTOMATIC. Geo Spectrum 1985

For 1990-2009 cars

# HARSH 1-2 UPSHIFT AT NORMAL SHIFT POINT - JATCO AUTOMATIC

HARSH 1-2 SHIFT

#### Model and Year: 1985 SPECTRUM - AUTO TRANSMISSION --------------

#### TO: ALL CHEVROLET DEALERS

Some 1985 model year Spectrum cars may exhibit a harsh 1-2 upshift condition on subject vehicles.

This condition can be caused by transient line pressures being higher than desired at the time of shifting, this in turn causes excessive loading of the second gear band.

On vehicles with this condition, the valve assembly control should be replaced using new Part Number 94422455. This assembly incorporates a number of new parts which are designed to eliminate the line pressure pulse wave at the time the shift occurs.

Use applicable labor time and operation number.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.