1993 Jeep Wrangler Problems

RepairPal has identified the most common problems with the 1993 Jeep Wrangler as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems
Due to the design of the reverse gear system in the AX-15 manual transmission, it may block shifting into reverse one out of every ten attempts. An updated reverse gear is available if the concern becomes more frequent.

A ticking type noise may be noted from the engine area due to an exhaust manifold that has cracked where the pipes are welded; cracked manifolds should be replaced.

The outer exhaust manifold studs can break and cause exhaust leaks, commonly noted as a ticking type noise. The outer studs, clamps, and nuts will need to be replaced and are now being tightened to a reduced torque value (20 Nm/180 in lbs).

Ignition wire failures can cause a rough idle or intermittent engine misfire and there might not be a Check Engine light.

The throttle position sensor (TPS) may fail causing intermittent drivability problems like hard starting, stalling, and/or hesitation when accelerating. A failed TPS will require replacement, proper diagnoses should always be performed before replacing any parts.

Engine oil leaks from the valve cover gasket, oil pan gasket and timing cover gasket are common.

Some models are susceptible to rear main oil seal failures in dirty or dusty conditions. As dirt and dust collect on the oil seal, the abrasion wears through the sealing surface. A spacer is used between the bell housing and engine that has a small slot in the 12 o'clock position. Filling this slot with RTV silicone and cleaning the seal area can help prevent damage to the seal.

If the clutch is slipping when the clutch disc is 2/3 worn or if the clutch slave cylinder dust boot is torn, there may be insufficient clearance between the clutch slave cylinder and the clutch housing. A 5mm shim is available from Jeep that is installed between the slave cylinder and the clutch housing.

The throttle body may accumulate an oily, black residue in the bore and on the throttle plate causing hard starting or possibly stalling when coming to a stop. The throttle body should be cleaned during regular maintenance but do not spray cleaners directly on or at the throttle position sensor (TPS) as this can damage the sensor.

Due to warped front brake rotors or variations in the thickness of the rotors, brake pulsations may develop. The best method to reduce pulsations is to use an "On the Car" brake lathe (as long as the rotors are suitable for turning). "On the Car" equipment can correct variations (or "runout") in the rotor surfaces because it also corrects variations in other components (e.g. the hub).

The ABS light can come on, indicating an ABS pump motor circuit fault. This is most likely to occur in warmer areas (above 90° F) and usually after a quick stop, like a refueling. If no faults can be found in the pump motor circuit after proper diagnostics, there is a revised ABS control module which should correct this concern.

The tailgate hinges can corrode making it difficult to open the tailgate.

The hood support rod can rattle against the radiator driving over rough roads or when the doors are slammed. Installing a foam ring on the support rod can help to prevent the rattling.