A/T - Noise On 2nd to 3rd Gear Shift: Overview

CATEGORY
Transmission

SECTION
4

PAGE
28

ISSUE
12/94-0530

CODE
472

Subject:
Diagnosing & Correcting Complaint of Noise When Shifting from 2nd to 3rd Gear





Application:
Certain 9000 Models Equipped with Automatic Transmission: See Figure 1

A customer may complain of noise ("squeal/squawk") when the transmission shifts from 2nd to 3rd gear. Because this noise complaint can be caused by many different things, fault diagnosis must be carried out in several stages to isolate and correctly identify the cause.

Please see this TSB for correct sequence for the stages of diagnosis and references to specific repairs.

Cars Affected:

See specific Stages on following pages for VIN's affected.

Parts:

LUBEGARD ATF Additive (See PSI 06/93-0352 included)

Intermediate shaft (non-Turbo) 44 91 833
Intermediate shaft (Turbo + V6) 44 78 376

Gasket See Spare Parts Microfiche

Tools:

Gearbox holder 87 91 469
Stand 87 91 451
Torque converter handles 87 91 766
Holding tool 87 91 816

Tools are available for purchase from Kent-Moore by calling their order desk at 1-800-345-2233. These tools were issued earlier as essential tools. Many dealers will have these on hand so check your tool supplies before ordering.

Action:

Isolating the probable cause for this "squeak/squawk" noise:

Stage 1:





Check for leakage in the gearbox oil cooler by removing the valve body cover and checking for signs of coolant. This can be identified by a pink, milky color of the transmission fluid or by checking at the low spots for signs of water contamination. See Figure 2.

If coolant is present, change the gearbox per Warranty Policy.

NOTE
The radiator must also be changed. See Service Manual 2:4 Exhaust system, cooling system, turbo system. The oil cooler, if fitted, with thermostat and hoses must also be thoroughly flushed. See S.I. 02/90-1215.

Stage 2

If LUBEGARD Additive (PSI 06/93-0352) has not been tried in previous repair attempts, change the fluid and add 5 fl. oz. (1.5 dl) of LUBEGARD additive. The customer should drive the car for 200 miles. At the same time, check and adjust the brake band following adjustment procedure found in Service Manual 4:2, p. 472-25.

Stage 3

On vehicles up to VIN Serial No. L1013313 and L2009536, check that this noise is not coming from the thermostatic valve at the ATF cooler. See copy of S.I. 11/89-1194.

Stage 4

On Turbo models, the noise may be coming from the Turbo by-pass valve. See PSI 11/93-0401 for information.

Stage 5

Change the intermediate shaft. See instructions that follow.