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SES Lamp ON, No Reverse Gear, PCM/TC Codes Set


91saturn01

NO.: 91-T-25

DATE: July, 1991

GROUP: Transaxle

CORP. NO.: 187106


SUBJECT: No Reverse and/or "SERVICE ENGINE SOON" telltale Lamp Illuminated (Replace Input Shaft Pilot Hub and Seal Rings) All 1991 Saturns with Automatic Transaxles


CONDITION: No reverse gear or the vehicle moves in reverse for a few feet and then stops. The "SERVICE ENGINE SOON" telltale lamp may be illuminated by this condition. During diagnostics, a PCM/TC Code 16, 18, 21, 22, 23 or 24 may be stored by the powertrain control module (PCM).

CAUSE: The no reverse condition or an illuminated "SERVICE ENGINE SOON" telltale lamp with a stored PCM/TC Code 16, 18, 21, 22, 23 or 24 may be caused by the input shaft pilot hub seal rings being rolled. If the inner seal ring is rolled, 2nd/REV oil may leak to the 1st clutch causing 1st and reverse clutches to be on at the same time creating a no reverse condition. This condition may also cause the 1st clutch oil to apply 2nd clutch at all times causing a PCM/TC Code 16 (No 1st Gear) or PCM/TC Code 21 (2nd Gear Stuck On).

In extreme cases, a rolled seal ring may cause the oil to return to the sump, creating a significant loss of oil pressure to the 1st, 2nd, 3rd, or 4th clutches causing PCM/TC Codes 18 (No Gears), 22 (No 2nd Gear), 23 (No 3rd Gear) or 24 (No 4th (Gear) to be set.

CORRECTIVE
ACTION: Transaxles built with change code "4" or higher have a new input shaft pilot hub and input shaft hub seal rings which eliminate these conditions. All transaxles with a "0", "1", "2" or "3" change code need to have both components replaced when these conditions exist. If any of these conditions are present, and the transaxle change code is "4" or higher, refer to the "Powertrain Control Module-Transaxle Control" in the "Automatic Transaxle Service Manual."


PARTS
REQUIREMENTS: 21001684 1 - Gasket - End Cover to Case
21002372 1 - Gasket - Input Hub End Cover
21002684 2 - Seal - Input Shaft Hub Ring
21002498 1 - Hub - Input Shaft Pilot


CLAIM
INFORMATION: To receive credit for this repair, submit a claim through the Saturn Dealer System as follows:

Labor
Case Operation
Type Description Code Time

VW Remove End Cover & Replace T9524 1.9 hrs
Input Shaft Pilot Hub and Input
Shaft Hub Seal Rings

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