| Engine oil & filter | AMC 258 I6 or 360/401 V8 · grade and capacity confirm in manual | Baseline now; then per your owner's manual | Filters are listed by engine and year: 4.2 L 1974–80 and 1981–86, V8 1974–83.Wix oil filter, V8-360/401 1974–1983 · Team Grand Wagoneer ↗Wix oil filter, 4.2 L 1974–1980 · Team Grand Wagoneer ↗Wix oil filter, 4.2 L 1981–1986 · Team Grand Wagoneer ↗ |
| Air & fuel filters | Air-cleaner element · inline fuel filter | Baseline now; inspect every oil change | A clogged element makes the carburetor run rich. Replace the air-cleaner-to-carb gasket at the same time.Air filter, 1974–1991 · Team Grand Wagoneer ↗Fuel filter assembly, 1974–1991 · Team Grand Wagoneer ↗Air cleaner to carburetor gasket, 1974–1991 · Team Grand Wagoneer ↗ |
| Spark plugs, wires, cap & rotor | Gap per underhood label confirm in manual | Baseline now | A full tune-up is the cheapest drivability fix before you blame the carburetor.Champion spark plug 8-piece set, V8 1974–1991 · Team Grand Wagoneer ↗Ignition wires, OE look, V8-360/401 1974–1991 · Team Grand Wagoneer ↗Distributor cap & rotor, V8 1978–1991 · Team Grand Wagoneer ↗Spark plug wire set, 4.2 L 1972–1986 · Team Grand Wagoneer ↗ |
| Coolant, thermostat & hoses | Coolant type and capacity confirm in manual | Flush and refill now | Replace the thermostat, gasket and radiator hoses together on a truck with no records.Thermostat & gasket, 1963–1991 · Team Grand Wagoneer ↗Radiator hose set, V8-360/401 1974–1991 · Team Grand Wagoneer ↗ |
| Automatic transmission (TH400 or 727) | ATF · pan drop with new filter confirm capacity in manual | Baseline now | 1974–79 automatics are GM TH400s; from 1980 it's the TorqueFlite 727. The filter kit listed fits the 727.100% synthetic automatic transmission fluid, 1963–1991 · Team Grand Wagoneer ↗A727 transmission cover gasket with filter & bolt set, 1974–1991 · Team Grand Wagoneer ↗ |
| Quadra-Trac transfer case (1974–79) | Quadra-Trac lubricant only · no multigrade detergent oil | Baseline now | The factory manual blames the wrong fluid for most stick-slip noise. Drain the low-range unit too if fitted, then drive slow circles both ways for 15 minutes.Quadra-Trac transfer case fluid (TCL-1) · Team Grand Wagoneer ↗ |
| Transfer case (NP208 / NP219 / NP229, 1980–83) | ATF-type fluid (Team Grand Wagoneer) · 3 qt NP208/228/229, 2 qt NP219 | Team Grand Wagoneer: every 50,000 mi in severe use, 100,000 mi normal | Check the yoke seals and, on Selec-Trac, the vacuum hoses while you're there.100% synthetic transfer case fluid, 1980–1991 · Team Grand Wagoneer ↗NP208/228/229 yoke rubber sealing washer, 1980–1991 · Team Grand Wagoneer ↗ |
| Front & rear differentials | 75W-90 gear oil · add limited-slip additive for a Trac-Lok · capacities confirm in manual | Baseline now | Dana 44 front; Dana 44 or AMC 20 rear depending on year. Team Grand Wagoneer's Dana 44 kit is 2 quarts of 75W-90 plus additive.Dana 44 differential fluid kit, 1976–1991 · Team Grand Wagoneer ↗Lube Locker Dana 44 differential cover gasket, 1968–1991 · Team Grand Wagoneer ↗Lube Locker AMC 20 rear cover gasket, 1980–1986 · Team Grand Wagoneer ↗ |
| Front wheel bearings | Clean, inspect and repack; new seals | Baseline now | Bearing preload is set by hand on these hubs, so follow the manual.Front hub bearing assembly kit, 1977–1991 · Team Grand Wagoneer ↗Front brake hub seal, 1974–1991 · Team Grand Wagoneer ↗ |
| U-joints & driveshafts | Grease every zerk; check for play | Every oil change | Check the front axle U-joints at full lock and the slip yokes for clunks.Spicer front axle U-joint, 1968–1991 · Team Grand Wagoneer ↗Spicer rear driveshaft U-joint, 1968–1991 · Team Grand Wagoneer ↗ |
| Power steering | Power-steering fluid; flush the old fluid | Baseline now | Look at the rag joint and the box seals while the system is open.Synthetic power steering fluid, 1963–1991 · Team Grand Wagoneer ↗Power steering box rag joint, 1974–1991 · Team Grand Wagoneer ↗ |
| Brake fluid, pads & lines | Fluid type per the master-cylinder cap confirm in manual | Flush now; then every 2 years | Confirm whether an early Cherokee has front discs or drums before ordering pads.Front ceramic brake pad set, 1971–1991 · Team Grand Wagoneer ↗Complete stainless pre-bent brake line kit, 1977–1991 · Team Grand Wagoneer ↗ |
| Accessory belts | V-belts on the V8; serpentine on the 1981–86 4.2 | Baseline now | Replace the V8's alternator/AC belts as a matched pair.Alternator / AC belt pair, V8-360 1980–1991 · Team Grand Wagoneer ↗Power steering belt, 1981–1991 · Team Grand Wagoneer ↗Serpentine belt, 4.2 L 1981–1986 · Team Grand Wagoneer ↗ |
| Leaf springs, bushings & shocks | Stock-height packs front and rear | Inspect now | Sagging springs and dead shocks make the truck wallow; replace bushings while the springs are out.Team Grand Wagoneer complete front & rear nitrogen shock set, 1974–1991 · Team Grand Wagoneer ↗Leaf spring & shackle bushing 12-piece set, 1977–1991 · Team Grand Wagoneer ↗ |