9000 L4-1985cc 2.0L DOHC (1986)
Fluid - A/T: All Technical Service Bulletins
A/T - ZF 4HP18 Upshift Squak or Moan Noise
CATEGORY
Transmission
SECTION
4
PAGE
14
ISSUE
06/93-0352
CODE
442
Subject:
Automatic Transmission
Upshift Noise
Application:
9000 Models with ZF Automatic Transmission
Some complaints have been received from owners of 9000 cars equipped with the ZF 4HP18 automatic transmission of a noise that occurs at the 2 - 3
upshift point. The noise may be described as a "squawk" or "moan" that usually occurs under light throttle pressure. A transmission fluid additive has
been tested and approved for use as a service solution to address these complaints.
Before this fluid supplement can be added, the condition of the transmission fluid must be checked. If there are any indications of either burned or
contaminated fluid, this may be the actual cause of the noise. In this case, addition of the fluid supplement will not cure the complaint.
It should be noted that the specific noise described in this PSI does not indicate any mechanical failure, or impending failure. It may, however, be an
irritant to the car owner and should be addressed.
Cars Affected:
9000 models with ZF automatic transmission.
Parts:
LUBEGARD ATF SUPPLEMENT, 10 fl.oz. (296ml) bottle (5.0 fl.oz. (150ml) required per car).