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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1989S15/T15 2WD P/U L4-151 2.5LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURES4L60 (700-R4) AUTOMATIC TRANSMISSION1-2 SHIFT SPEED - HIGH OR LOW
1989 GMC S15/T15 2WD P/U L4-151 2.5L
1-2 Shift Speed - High or Low
1989 GMC S15/T15 2WD P/U L4-151 2.5LSECTION 1-2 Shift Speed - High or Low
1. TV cable binding, broken or incorrectly adjusted.
2. Faulty governor assembly. Refer to "First Speed Only-No Upshift."
3. Throttle lever and bracket assembly damaged, binding or incorrectly assembled.
4. TV link missing, binding or damaged.
5. TV exhaust check ball and TV plunger sticking.
6. Valve body or oil pump assembly face not flat.
2. Faulty governor assembly. Refer to "First Speed Only-No Upshift."
3. Throttle lever and bracket assembly damaged, binding or incorrectly assembled.
4. TV link missing, binding or damaged.
5. TV exhaust check ball and TV plunger sticking.
6. Valve body or oil pump assembly face not flat.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.