INTERMITTENT DELAYED UPSHIFTS HOT OR COLD/PARTS AVAILABLE

MODELS AFFECTED: 1985-1990 DE VILLES AND FLEETWOODS 1986-1990 ELDORADOS AND SEVILLES

Some 1985-1990 DeVilles and Fleetwoods or 1986-1990 Eldorados and Sevilles may exhibit transmission shift timing (not shift feel) conditions that may be described as:

Delayed upshifts Early upshifts No upshifts 1-2 shift at full throttle only No full throttle or part throttle detent downshifts Intermittent second gear starts Harsh 3-2 downshifts

Any of these conditions may be caused by TV system problems.

Diagnosis Information:

TV System Diagnosis

1. Check the TV cable for:

Correct part number. Kinked, bound, disconnected, or broken condition. Proper set.

2. With engine off, is there tension on the TV cable when it is pulled and released? If not, check for:

Disconnected throttle lever to cable link.

Broken TV cable.

A stuck TV plunger in the TV bushing. Refer to Figure 1, items 308 and 309. if the TV plunger/bushing assembly is worn, sticking, or binding, replace the assembly with parts listed in service parts information.

3. Does the TV cable lose tension once the engine is started? If it does, check for:

Throttle valve stuck in the bore. Refer to Figure 1, item 311. To repair this condition clean the valve and bore. Refer to bulletin T-86-45 for proper service procedures. If the throttle valve moves freely in the bore, then the pump cover is mis-machined and should be replaced.

Refer to the 1985-1990 Service Information Manual for repair procedures.

Service Parts Information:

TV Plunger/Bushing Transaxle Model Package Number Identification

8649317 5AC, 5AY, 50Y, 50B 8649641 All other Cadillac models

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.