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 MANUALSCHEVROLET1995CHEVY VAN G30, VAN CARGO EXTENDED, 6.5 YREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 7.4LTROUBLE CODE CHARTSCODE 87, HIGH GEAR RATIO ERRORNOTES
1995 Chevrolet Chevy Van G30, Van Cargo Extended, 6.5 Y
Code 87, High Gear Ratio Error: Notes
1995 Chevrolet Chevy Van G30, Van Cargo Extended, 6.5 YSECTION Notes
Control module calculates ratio based on transmission input speed and output speed sensor readings. Control module compares known ratio to calculated ratio.
- An out-of-calibration transmission range pressure switch could falsely indicate actual transmission range.
- This test verifies proper ratio.
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.