LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - Overhaul - 4L80-E >> Trouble Shooting >> Symptom Diagnosis >> Converter Clutch Apply Time Wrong

Converter Clutch Apply Time Wrong

Incorrect output speed sensor, engine speed or throttle position sensor signal. Faulty PCM or TCM. Faulty pressure switch or temperature sensor. Incorrect coolant or transmission temperature (Diesel engine) signal. Possible trouble Code 14, 15, 21, 22, 24, 28, 58, 59 or 68. Problem with digital ratio adapter (2WD only).

CLUTCH & BAND APPLICATION CHART

Selector Lever Position Solenoid Position Elements In Use
"D" (Overdrive)
1st Gear "A" ON/"B" OFF (1) Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch & Low Roller Clutch
2nd Gear "A" OFF/"B" OFF (1) Overdrive Roller Clutch, Forward Clutch, (1) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
3rd Gear "A" OFF/"B" ON (1) Overdrive Roller Clutch, Forward Clutch, Direct Clutch, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
Overdrive "A" ON/"B" ON 4th Clutch, (3) Overdrive Roller Clutch, Forward Clutch, Direct Clutch, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"D" (Manual 3rd)
1st Gear "A" ON/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch & (1) Low Roller Clutch
2nd Gear "A" OFF/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, (1) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
3rd Gear "A" ON/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, Direct Clutch, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"2" (Manual 2nd)
1st Gear "A" ON/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch & (1) Low Roller Clutch
2nd Gear "A" OFF/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, Front Band, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"1" (Manual Low)
1st Gear "A" ON/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, (2) Intermediate Sprag Clutch, (1) Low Roller Clutch & Rear Band
2nd Gear "A" OFF/"B" OFF Overrun Clutch, (1) Overdrive Roller Clutch, Forward Clutch, Front Band, (3) Intermediate Sprag Clutch, Intermediate Clutch & (3) Low Roller Clutch
"R" (Reverse) "A" ON/"B" OFF (1) Overdrive Roller Clutch, Direct Clutch & Rear Band
"N" (Neutral) "A" ON/"B" OFF (1) Overdrive Roller Clutch; All Other Clutches & Bands Released Or Ineffective
"P" (Park) "A" ON/"B" OFF (1) Overdrive Roller Clutch; All Other Clutches & Bands Released Or Ineffective
(1) Holding.
(2) Applied but not effective.
(3) Overrunning.
scientia non olet · About LEMON Manuals