J
jrcase
Guest
What is considered "early production" ? Mine was built on 8/22/2002. Is this one of them?
From Ken Fichtner's newsletter:
9) 2003 Corvette Transmission Slip
Attention: Service Manager
Subject: Slips in 3rd and or 4th, Slips in all Forward Gears at Low Miles (Test Pressure Control Solenoid - PCS)
Models: 2003 Cadillac: Escalade, Chevrolet: Avalanche, Silverado, Tahoe, Suburban, Blazer, Trailblazer, S10, Astro, Express, Corvette, GMC: Sierra, Yukon, Yukon XL, Envoy, Sonoma, Safari, Savana, Oldsmobile: Bravada Equipped with 4L60E (M30) Automatic Transmission
Some early production vehicles may experience a slip in 3rd or 4th gear or in all forward gears at approximately 1,500 - 3,000 miles . This slip may be due to a distress of the 3-4 clutch or the forward clutch. The cause of the clutch distress may be a pressure control solenoid (PCS) which does not respond properly and "sticks" in a low line condition. If the PCS sticks it can create transmission line pressure which is too low in some conditions resulting in clutch distress. If diagnosis determines that one or more clutch packs are burned be sure to perform a Line Pressure Check Procedure as detailed in SI.
A Line Pressure Check requires the use of a Tech II and a line pressure gage. When performing this test it is very important to start the test at 1.0 amps and reduce the commanded amperage in 0.1 amp increments while reading the corresponding line pressure on a pressure gage. A faulty PCS will result in low line pressure until approximately 0.4 to 0.3 amps are commanded. After reaching this amperage the PCS will function properly until maximum amps are commanded again. If the PCS passes the Line Pressure Check it is not faulty and does not need to be replaced.
From Ken Fichtner's newsletter:
9) 2003 Corvette Transmission Slip
Attention: Service Manager
Subject: Slips in 3rd and or 4th, Slips in all Forward Gears at Low Miles (Test Pressure Control Solenoid - PCS)
Models: 2003 Cadillac: Escalade, Chevrolet: Avalanche, Silverado, Tahoe, Suburban, Blazer, Trailblazer, S10, Astro, Express, Corvette, GMC: Sierra, Yukon, Yukon XL, Envoy, Sonoma, Safari, Savana, Oldsmobile: Bravada Equipped with 4L60E (M30) Automatic Transmission
Some early production vehicles may experience a slip in 3rd or 4th gear or in all forward gears at approximately 1,500 - 3,000 miles . This slip may be due to a distress of the 3-4 clutch or the forward clutch. The cause of the clutch distress may be a pressure control solenoid (PCS) which does not respond properly and "sticks" in a low line condition. If the PCS sticks it can create transmission line pressure which is too low in some conditions resulting in clutch distress. If diagnosis determines that one or more clutch packs are burned be sure to perform a Line Pressure Check Procedure as detailed in SI.
A Line Pressure Check requires the use of a Tech II and a line pressure gage. When performing this test it is very important to start the test at 1.0 amps and reduce the commanded amperage in 0.1 amp increments while reading the corresponding line pressure on a pressure gage. A faulty PCS will result in low line pressure until approximately 0.4 to 0.3 amps are commanded. After reaching this amperage the PCS will function properly until maximum amps are commanded again. If the PCS passes the Line Pressure Check it is not faulty and does not need to be replaced.
