Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSA/T - TORQUE CONVERTER IDENTIFICATIONOVERVIEW
1990 Chevrolet Lumina APV V6-191 3.1L
A/T - Torque Converter Identification: Overview
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Overview
TRANSMISSION: GM
BULLETIN: # 010 REVISED
SUBJECT: Torque Converters
DATE: September 1990
GM Torque Converter I.D.
See the accompanying sections for identification of the 298 mm and 245 mm torque converters.
For Additional Information:
TRANSMISSION DIGEST
April '90 "Technically Speaking"
BULLETIN RECAP
^ The first digit
= Application
^ The second digit
= "K" factor; on 298 mm T/C's
K x 14.2574 = STALL
On 245 mm T/C's
K x 11.6438 = STALL.
^ The third digit
= clutch type
^ The fourth digit
= Cover type
BULLETIN: # 010 REVISED
SUBJECT: Torque Converters
DATE: September 1990
GM Torque Converter I.D.
See the accompanying sections for identification of the 298 mm and 245 mm torque converters.
For Additional Information:
TRANSMISSION DIGEST
April '90 "Technically Speaking"
BULLETIN RECAP
^ The first digit
= Application
^ The second digit
= "K" factor; on 298 mm T/C's
K x 14.2574 = STALL
On 245 mm T/C's
K x 11.6438 = STALL.
^ The third digit
= clutch type
^ The fourth digit
= Cover type
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.