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Automatic Transmission Diagnosis - 4L80-E: Application Chevrolet Silverado 2500

Automatic Trans 1 illustration

APPLICATION

WARNINGVehicle is equipped with Supplemental Inflatable Restraint (SIR) system. When servicing vehicle, use care to avoid accidental air bag deployment. SIR system-related components are located in various locations throughout interior and exterior of vehicle, depending on application. Do not use electrical test equipment on or near these circuits. If necessary, deactivate SIR system before servicing components. See AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION.
ApplicationTransmission Model (RPO)
Chevrolet
Avalanche (1)4L80-E (MT1)
Silverado & Silverado HD (6.0L)4L80-E (MT1)
Suburban (6.0L & 8.1L)4L80-E (MT1)
GMC
Sierra & Sierra HD (6.0L)4L80-E (MT1)
Yukon XL 2500 (6.0L & 8.1L)4L80-E (MT1)
(1) 2002 Model.
(1)2002 Model.

TRANSMISSION APPLICATION

Transmission is identified by metal identification plate attached to rear face of transmission case. (Scheme 163)

Scheme 163

Scheme 163: TRANSMISSION
Scheme 163: TRANSMISSION

CLUTCH & BAND APPLICATIONS

Gearshift Lever Position (Gear)Shift Solenoid StateElements In Use
"D" (1st)1-2 ON; 2-3 OFF(1) Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch & (1) Low Roller Clutch
"D" (2nd)1-2 OFF; 2-3 OFF(1) Overdrive Roller Clutch, Forward Clutch, (1) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"D" (3rd)1-2 OFF; 2-3 ON(1) Overdrive Roller Clutch, Forward Clutch, Direct Clutch, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"D" (4th)1-2 ON; 2-3 ON4th Clutch, (3) Overdrive Roller Clutch, Forward Clutch, Direct Clutch, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"3" (1st)1-2 ON; 2-3 OFFOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch & (1) Low Roller Clutch
"3" (2nd)1-2 OFF; 2-3 OFFOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, (1) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"3" (3rd)1-2 OFF; 2-3 ONOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, Direct Clutch, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"2" (1st)1-2 ON; 2-3 OFFOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch & (1) Low Roller Clutch
"2" (2nd)1-2 OFF; 2-3 OFFOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, Manual 2-1 Band, (1) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"1" (1st)1-2 ON; 2-3 OFFOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch, (1) Low Roller Clutch & Low/Reverse Band
"1" (2nd)1-2 OFF; 2-3 OFFOverrun Clutch, Overdrive Roller Clutch, Forward Clutch, Manual 2-1 Band, (1) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"R" (Reverse)1-2 ON; 2-3 OFF(1) Overdrive Roller Clutch, Direct Clutch & Low/Reverse Band
"N" Or "P" (Neutral Or Park)1-2 ON; 2-3 OFF(1) Overdrive Roller Clutch
(1) Holding. (2) Applied but not effective. (3) Overrunning.
(1)Holding.
(2)Applied but not effective.
(3)Overrunning.

CLUTCH & BAND APPLICATIONS

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