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 MANUALSJEEP1987COMANCHE BASE, 2.1 BREPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDRIVESHAFT & UNIVERSAL JOINTSDRIVE SHAFT ALIGNMENTADJUSTMENTSDRIVE SHAFT BALANCE
1987 Jeep Comanche Base, 2.1 B
Drive Shaft Balance
1987 Jeep Comanche Base, 2.1 BSECTION Drive Shaft Balance
- Drive shaft imbalance may often be cured by disconnecting shaft and rotating it 180 degrees in relation to other components. Test by raising rear wheels off ground, and turning shaft with engine.NOTE: DO NOT run engine with transmission engaged for prolonged periods, as overheating of engine or transmission may occur.
- On most models, balancing may be done by marking shaft in 4 positions, 90 degrees apart. Place marks approximately 6" forward of weld, at rear end of shaft. Number marks one through 4.
- Place screw-type hose clamp in number one position, and rotate shaft with engine. If there is little or no change, move clamp to No. 2 position, and repeat test.
- Continue procedure until vibration is at lowest level. If no difference is noted with clamp moved to all 4 positions, vibrations may not be drive shaft imbalance.
- If vibration is lessened but not completely gone, place 2 clamps at that point, and run test again. Combined weight of clamps in one position may increase vibration. If so, rotate clamps 1/2" apart, above and below best position, and repeat test.
- Continue to rotate clamps as necessary, until vibration is at lowest point. When point is reached where vibration has been eliminated, bend end of clamp so it will not loosen. If vibration level is still unacceptable, repeat procedure at front end of drive shaft.
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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.