1991 Jeep Wrangler Lug Nut Torque & Bolt Specs

The 1991 Jeep Wrangler lug nut torque is 130 ft-lbs (176 Nm), tightened with a 3/4" socket on M14x1.5 studs. Torque in a star pattern in two passes (snug, then final), and re-check after the first 50–100 miles of driving. Use a calibrated torque wrench — not an impact gun — for the final pass.

Lug nut torque: 130 ft-lbs (176 Nm) · Socket size: 3/4" · Thread: M14x1.5.

This page is the OEM-referenced fastener summary for the 1991 Jeep Wrangler. Use it before any maintenance or repair job where torque values matter — brake work, wheel changes, suspension service, engine teardowns, or oil changes. Specs are pulled from manufacturer service literature, cross-checked against community data, and updated as new chassis variants become available.

Stellantis (Jeep/Ram/Dodge/Chrysler) torque values: Wrangler/Cherokee lug nuts spec 100 ft-lbs (135 Nm), Ram 1500 specs 135 ft-lbs (183 Nm), Ram 2500/3500 specs 160 ft-lbs (217 Nm). Most use a 19mm or 22mm socket with M14x1.5 thread on trucks. The Wrangler's hub-centric ring is critical — do not run hub-piloted wheels without it.

Common fastener categories on the 1991 Jeep Wrangler

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket bolts (typically 80-130 ft-lbs) and slide/guide pins (18-35 ft-lbs)
Engine oil drain plug torque — rarely above 30 ft-lbs; always use a new crush washer
Transmission pan, valve cover, and intake manifold bolts (low torque, often 89-106 in-lbs)
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque (typically 10-15 ft-lbs on aluminum heads — do not exceed)
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

Heads up for 1991 Jeep Wrangler owners: Vehicles this age frequently have seized fasteners due to thread corrosion. Apply penetrating oil (PB Blaster, Kroil) 24 hours before any wrenching, and have a thread chaser on hand. Lug studs are particularly prone to thread damage at this age; if a nut spins on without engaging, the stud is stretched and must be replaced before the wheel goes back on.

Tools you will need

SAE socket set (1/4"-7/8"), 6-point impact-rated
Calibrated torque wrench (10-150 ft-lbs covers most automotive jobs; add a 0-250 ft-lbs wrench for truck lug nuts)
Breaker bar (24" minimum) for initial loosening
Penetrating oil (PB Blaster or Kroil) for any fastener over 5 years old
Anti-seize on stainless or dissimilar-metal threads; thread-locker (Loctite blue) on critical reassembly

Frequently asked questions

What is the lug nut torque on a 1991 Jeep Wrangler?

The OEM-specified lug-nut torque for the 1991 Jeep Wrangler is 130 ft-lbs (176 Nm), using a 3/4" socket on M14x1.5 thread studs. Use a calibrated torque wrench in a star pattern, in two passes (50% and 100%), and re-check after 50-100 miles of driving.

What socket size do I need for the 1991 Jeep Wrangler lug nuts?

The 1991 Jeep Wrangler uses a 3/4" socket. A 6-point impact-rated socket is recommended over a 12-point chrome socket — 12-points round off lug nuts under impact-driver use.

Are the 1991 Jeep Wrangler fasteners metric or SAE?

SAE inch is the standard for this vehicle. Most fasteners on this vehicle are SAE inch, common sizes 1/4", 5/16", 3/8", 7/16", 1/2". Bolt-head markings are the fastest way to confirm grade and material at the bench.

Other Jeep Wrangler years

Same model, different model year — fastener spec may change. Always confirm against the year for your VIN.

→ 1991 Jeep Wrangler oil drain plug torque & size

→ 1991 Jeep Wrangler suspension & steering torque specs (control arm, ball joint, tie rod)

All 57 1991 Jeep Wrangler fastener specs

Per-bolt torque, wrench size, and thread spec for the 1991 Jeep Wrangler, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both. 2 of the 57 fastener specs on this page are independently verified against OEM service manuals and manufacturer torque data (last reviewed June 2026).

Wheels — 1991 Jeep Wrangler

Wheel and lug nut spec for the 1991 Jeep Wrangler. At the wheel hub, the wheel lug nut torques to 130 ft-lbs (176 Nm) (3/4" drive, M14x1.5 thread).

Brakes — 1991 Jeep Wrangler

Brake fasteners on the 1991 Jeep Wrangler — caliper bracket, slide pins, and banjo bolt torque follow. For the caliper, plan for a 14mm tool on a M10x1.0 stud; final torque is 25 ft-lbs (brake line banjo bolt). Caliper mounting bolt (no separate bracket — tj single-piece design) tightens to 11 ft-lbs (15 Nm), takes a 13mm driver, runs on M14x2.0 threads, located at the steering knuckle. This figure is independently verified against OEM service data. The brake line bracket bolt uses a 10mm drive on a M6x1.0 thread, torqued to 89 in-lbs at the frame rail. At the steering knuckle, the wheel speed sensor bolt torques to 89 in-lbs (10mm drive, M6x1.0 thread). For the brake booster, plan for a 15mm tool on a M10x1.5 stud; final torque is 25 ft-lbs (master cylinder nut).

Engine — 1991 Jeep Wrangler

Engine bolt-by-bolt torque for the 1991 Jeep Wrangler, including the long block, valve covers, and intake. Throttle body bolt tightens to 12 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the intake. The oil drain plug is a M14x1.5 thread, torqued to 20 ft-lbs (27 Nm) at the oil pan. OEM-verified spec. At the cylinder head, the intake manifold bolt torques to 18 ft-lbs (13mm drive, M8x1.25 thread). For the oil pan, plan for a 10mm tool on a M6x1.0 stud; final torque is 12 ft-lbs (oil pan bolt). Oil filter housing bolt tightens to 18 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the block. The radiator mount bolt uses a 13mm drive on a M8x1.25 thread, torqued to 18 ft-lbs at the core support. At the camshaft, the cam sprocket bolt torques to 65 ft-lbs (15mm drive, M12x1.5 thread). For the bracket, plan for a 13mm tool on a M8x1.25 stud; final torque is 25 ft-lbs (a/c compressor bolt). Thermostat housing bolt tightens to 12 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the cylinder head. The air intake tube clamp uses a 7mm drive on a Worm Drive thread, torqued to 35 in-lbs at the air box. At the intake, the map sensor bolt torques to 71 in-lbs (8mm drive, M5x0.8 thread). For the block, plan for a 15mm tool on a M10x1.5 stud; final torque is 40 ft-lbs (alternator bracket bolt).

Drivetrain — 1991 Jeep Wrangler

Drivetrain and driveline fasteners for the 1991 Jeep Wrangler — axle, transmission, and differential plugs. The axle vent tube fitting uses a 14mm drive on a M10x1.0 thread, torqued to 15 ft-lbs at the differential cover. At the differential, the driveshaft u-joint strap torques to 15 ft-lbs (8mm drive, M6x1.0 thread). For the crossmember, plan for a 15mm tool on a M10x1.5 stud; final torque is 45 ft-lbs (transmission mount bolt). Differential cover bolt tightens to 30 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the differential. The transfer case mount bolt uses a 15mm drive on a M10x1.5 thread, torqued to 45 ft-lbs at the crossmember.

Suspension — 1991 Jeep Wrangler

Suspension and chassis fastener torque for the 1991 Jeep Wrangler — strut, control arm, and sway bar values. At the spring perch, the spring retainer bolt torques to 27 ft-lbs (13mm drive, M8x1.25 thread). For the frame, plan for a 18mm tool on a M12x1.75 stud; final torque is 75 ft-lbs (shock mount bolt). Control arm bolt tightens to 125 ft-lbs, takes a 21mm driver, runs on M14x2.0 threads, located at the frame. The track bar bolt uses a 21mm drive on a M14x2.0 thread, torqued to 125 ft-lbs at the frame bracket.

Steering — 1991 Jeep Wrangler

Steering linkage fasteners on the 1991 Jeep Wrangler. For the drag link, plan for a 1-1/16" tool on a Right/Left Thread stud; final torque is 65 ft-lbs (drag link adjustment sleeve). Power steering line bolt tightens to 25 ft-lbs, takes a 16mm driver, runs on M10x1.0 threads, located at the steering box. The steering box mount bolt uses a 18mm drive on a M12x1.75 thread, torqued to 75 ft-lbs at the frame rail. At the steering knuckle, the tie rod end nut torques to 65 ft-lbs (21mm drive, M14x2.0 thread). For the steering column, plan for a 13mm tool on a M8x1.25 stud; final torque is 27 ft-lbs (steering shaft u-joint bolt).

Body — 1991 Jeep Wrangler

Body fasteners on the 1991 Jeep Wrangler. Windshield frame bolt tightens to 27 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the cowl. The hood hinge bolt uses a 13mm drive on a M8x1.25 thread, torqued to 27 ft-lbs at the hood frame. At the body frame, the fender bolt torques to 89 in-lbs (10mm drive, M6x1.0 thread). For the frame rail, plan for a 18mm tool on a M12x1.75 stud; final torque is 75 ft-lbs (bumper mount bolt).

Electrical — 1991 Jeep Wrangler

Electrical fasteners on the 1991 Jeep Wrangler. The transmission ground strap bolt uses a 10mm drive on a M6x1.0 thread, torqued to 8 ft-lbs at the transmission to frame. At the engine block, the starter mounting bolt torques to 45 ft-lbs (15mm drive, M10x1.5 thread). For the frame rail, plan for a 10mm tool on a M6x1.0 stud; final torque is 89 in-lbs (ground strap bolt). Fuel pump ground wire bolt tightens to 8 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the fuel pump to frame. The battery hold down bolt uses a 13mm drive on a M8x1.25 thread, torqued to 15 ft-lbs at the battery tray. At the radio chassis to body, the radio ground wire bolt torques to 8 ft-lbs (10mm drive, M6x1.0 thread). For the engine block, plan for a 15mm tool on a M10x1.5 stud; final torque is 40 ft-lbs (alternator pivot bolt). Abs module ground bolt tightens to 8 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the abs module to frame. The battery ground cable bolt uses a 13mm drive on a M8x1.25 thread, torqued to 15 ft-lbs at the battery negative to frame. At the inner fender, the pdc mount bolt torques to 89 in-lbs (10mm drive, M6x1.0 thread). For the module to body, plan for a 10mm tool on a M6x1.0 stud; final torque is 8 ft-lbs (ignition module ground bolt).

Interior — 1991 Jeep Wrangler

Interior fasteners on the 1991 Jeep Wrangler. At the dashboard, the instrument cluster screw torques to 27 in-lbs (7mm drive, M4x0.7 thread). For the door edge, plan for a 10mm tool on a M6x1.0 stud; final torque is 89 in-lbs (door latch bolt). Seat belt anchor bolt tightens to 45 ft-lbs, takes a 16mm driver, runs on M10x1.5 threads, located at the b-pillar. The glove box hinge screw uses a 8mm drive on a M5x0.8 thread, torqued to 45 in-lbs at the dashboard. At the door panel, the door handle screw torques to 27 in-lbs (7mm drive, M4x0.7 thread). For the firewall, plan for a 10mm tool on a M6x1.0 stud; final torque is 89 in-lbs (dashboard mount bolt). Door panel clip tightens to Hand Tight, takes a 8mm driver, runs on Push-Type threads, located at the door panel. The seat back pivot bolt uses a 15mm drive on a M10x1.5 thread, torqued to 40 ft-lbs at the seat frame. At the floor pan, the seat track bolt torques to 35 ft-lbs (13mm drive, M8x1.25 thread). For the door frame, plan for a 13mm tool on a M8x1.25 stud; final torque is 27 ft-lbs (door hinge bolt).

New to torquing wheels? Read our How lug nut torque works — the complete guide for star-pattern sequence, re-torque intervals, and how to read a lug spec — then use the 1991 Jeep Wrangler numbers above.

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