Specs, fluids & service · 1984–1991
Jeep Grand Wagoneer (SJ) specs, fluids and service intervals
The numbers you need in the garage, on one page: spec sheet, capacities and service intervals, wheels and tires, and the parts to order. Sourced from owners, specialists and the factory; tags marked confirm in manual haven't been checked against a factory source yet.
Spec sheet
| PLATFORM | SJ (shared with J-Series pickups) |
|---|---|
| PRODUCTION | 1984–June 21, 1991 as Grand Wagoneer (SJ since 1963) |
| PLANT | Toledo, Ohio |
| ENGINE | AMC 360 (5.9 L) V8, 2-bbl Motorcraft · 4.2 L I6 offered 1984–86 |
| TRANSMISSION | Chrysler A727 three-speed automatic |
| TRANSFER CASE | Selec-Trac NP228 / NP229 (2.6:1 low), NP208 on some |
| AXLES | Dana 44 front (full-floating) · AMC or Dana 44 rear |
| WHEELBASE | 108.7 in |
| LENGTH | 186.4 in |
| FUEL TANK | 20.3 US gal with skid plate |
| TOWING | 5,000 lb (Class III Package B, 1989) |
| BUILT | 101,637 Grand Wagoneers (Hagerty) · 4,253 in 1991 |
By year
| YEARS | PLATFORM | ENGINE | OUTPUT | NOTES |
|---|---|---|---|---|
| 1963–1965 | Wagoneer (Kaiser) | Tornado 230 OHC I6 | 140 hp | IFS optional on 4WD (dropped 1965). Two- and four-door wagons and a panel delivery. |
| 1965–1968 | Wagoneer / Super Wagoneer | AMC 327 V8 · AMC 232 I6 | 250 hp (270 hp Super) | Super Wagoneer 1966–69, about 3,989 built. |
| 1968–1971 | Wagoneer | Buick 350 Dauntless V8 | 230 hp / 350 lb-ft | Last non-AMC engine. Solid axles and leaf springs only from 1969. |
| 1972–1983 | Wagoneer (AMC) | AMC 360 / 401 V8 · 258 I6 | Varies by year | Quadra-Trac from 1973, Limited trim from 1978, Selec-Trac standard for 1983. |
| 1984–1986 | Grand Wagoneer | AMC 360 V8 (4.2 I6 offered) | 140–144 hp (see engineering) | Renamed from Limited. 1986 refresh: grille, dash, Trac-Lok. |
| 1987–1991 | Grand Wagoneer (Chrysler) | AMC 360 V8, 2-bbl | Hagerty: 140 hp / 280 lb-ft | Marine-teak woodgrain from 1987. 1989–91 best of the breed; 1991 Final Edition badge. |
| 1993 | Grand Wagoneer (ZJ) | 5.2 L Magnum V8 | 220 hp | A one-year woodgrain Grand Cherokee, 6,378 built. A different truck entirely. |
Fluids, capacities & service intervals
A Grand Wagoneer is at least 35 years old. Treat every fluid, rubber part and ignition part as original unless there are receipts. Capacities below are marked for confirmation because we couldn't find a sourced factory fill table. The parts catalogs split by year: 1984–86 versus 1987–91 (filters, ignition modules), and York versus Sanden A/C compressors (1978–88 versus 1989–91).
| ITEM | SPEC / CAPACITY | INTERVAL | NOTES & PARTS |
|---|---|---|---|
| Engine oil & filter | AMC 360 V8 · AMSOIL's 1989 lookup lists 5 qt with filter and 10W-30 or 10W-40 for most climates confirm in manual | Baseline now; then per your owner's manual | The filter changes by year: one for 1984–86, another for 1987–90, and a third for 1991. Order by model year.Wix oil filter, V8-360 1984–1986 · Team Grand Wagoneer ↗Wix oil filter, V8-360 1987–1990 · Team Grand Wagoneer ↗Wix oil filter, V8 1991 · Team Grand Wagoneer ↗ |
| Air filter & fuel filter | Stock air-cleaner element · inline fuel filter | Baseline now; inspect every oil change | A dirty filter makes the 2150 carb 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 | 8 plugs · gap per underhood label confirm in manual | Baseline now | Hagerty flags Motorcraft ignition problems. A fresh tune-up is the cheapest drivability fix before you blame the carburetor.Champion spark plug 8-piece set, V8 1974–1991 · Team Grand Wagoneer ↗Accel distributor cap & rotor set, V8-360/401 1978–1991 · Team Grand Wagoneer ↗Ignition wires, OE look, V8-360/401 1974–1991 · Team Grand Wagoneer ↗ |
| Ignition module (carry a spare) | Early 1978–1987 / late 1988–1991 | Carry one | Electronic ignition modules are split by year; a spare in the glovebox is cheap insurance on a 30-plus-year-old system.Ignition module, early, 1978–1987 · Team Grand Wagoneer ↗Ignition module, late, 1988–1991 · Team Grand Wagoneer ↗ |
| Coolant, thermostat, hoses & cap | AMSOIL's 1989 lookup lists 13.7 qt · coolant type confirm in manual | Flush and refill now | Replace the thermostat, gasket, radiator hoses and cap together, and check the thermal fan clutch while the system is open.Thermostat & gasket, 1963–1991 · Team Grand Wagoneer ↗Radiator hose set, V8-360/401 1974–1991 · Team Grand Wagoneer ↗Radiator cap, 1965–1991 · Team Grand Wagoneer ↗Thermal fan clutch, V8 1974–1991 · Team Grand Wagoneer ↗ |
| Automatic transmission (A727) fluid & filter | ATF · drain pan, new filter and gasket · AMSOIL's 1989 lookup lists about 4 qt for a pan drop and 8.6 qt total confirm in manual | Every 30,000 mi or 3 years with conventional fluid (Team Grand Wagoneer's filter-kit listing) | This is a pan drop, not a flush. Team Grand Wagoneer recommends fully synthetic ATF.Transmission filter & gasket set, A727/A999 1979–1991 · Team Grand Wagoneer ↗100% synthetic automatic transmission fluid · Team Grand Wagoneer ↗ |
| Transfer case (NP228 / NP229 / NP208) | ATF-type fluid (per Team Grand Wagoneer) · AMSOIL's 1989 lookup lists 5.9 pints for the NP208/NP229 confirm in manual | Baseline now; Team Grand Wagoneer suggests every 50,000 mi in severe use, 100,000 mi in normal use (with its synthetic fluid) | While you're under there, check the yoke seals and the Selec-Trac vacuum lines.100% synthetic transfer case fluid, 1980–1991 · Team Grand Wagoneer ↗NP208/NP228/NP229 yoke rubber sealing washer · Team Grand Wagoneer ↗ |
| Front & rear differentials | 75W-90 gear oil · limited-slip additive or LSD-rated oil for Trac-Lok axles · AMSOIL's 1989 lookup lists 2.7 pints front and 3 pints rear confirm in manual | Baseline now | The front is a Dana 44; the rear is an AMC or Dana 44 depending on year. Read the tag and use LSD-compatible oil if the truck has Trac-Lok (standard with Selec-Trac from 1986).Synthetic gear lubricant 75W-90 · Team Grand Wagoneer ↗Driven synthetic limited-slip gear oil 75W-90 · Team Grand Wagoneer ↗ |
| U-joints & driveshafts | Grease every zerk; inspect for play | Every oil change | Check the front axle U-joints at full lock and the driveshaft joints and slip yoke for clunks.Spicer front axle U-joint, 1968–1991 · Team Grand Wagoneer ↗Spicer rear driveshaft U-joint, 1968–1991 · Team Grand Wagoneer ↗ |
| Front ball joints (Dana 44) | Check for vertical and horizontal play | Inspect now | Worn joints show up as wander and uneven tire wear. Replace upper and lower together.Front upper & lower ball joint set, 1974–1991 · Team Grand Wagoneer ↗ |
| Power steering fluid | Power-steering fluid · flush the old fluid | Baseline now | Team Grand Wagoneer notes most owners never flush it. While you're there, check the steering box rag joint.Synthetic power steering fluid, 1963–1991 · Team Grand Wagoneer ↗Power steering box rag joint, 1974–1991 · Team Grand Wagoneer ↗ |
| Brake fluid, pads & lines | Brake fluid per the master-cylinder cap confirm in manual | Flush now; then every 2 years | Old steel lines on a salt-state truck deserve a hard look. A complete pre-bent stainless kit is available.Front ceramic brake pad set, 1971–1991 · Team Grand Wagoneer ↗Complete stainless pre-bent brake line kit, 1977–1991 · Team Grand Wagoneer ↗ |
| Accessory belts | Alternator/AC pair and power-steering belt (V8-360) | Baseline now | The 360 uses V-belts. Replace both 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 ↗ |
| Leaf springs & shocks | Stock-height leaf springs front and rear | Inspect now | Sagging springs and dead shocks make the truck wallow. Stock-height sets and full nitrogen shock sets are available.Complete front & rear nitrogen shock set, 1974–1991 · Team Grand Wagoneer ↗Leaf spring set, stock height, 1976–1991 · Team Grand Wagoneer ↗ |
Capability
| Towing | 5,000 lb (2,270 kg) Trailer Package B (Class III), 750 lb tongue; Package A is rated 3,500 lb (1989 spec) |
|---|---|
| GVWR | 6,200 lb (2,812 kg) |
| Fuel tank | 20.3 US gal (77 L) with skid plate |
| Ground clearance | 10.1 in (257 mm) minimum running clearance |
| Curb weight | 4,514 lb (2,048 kg) |
| Fuel economy | About 11 mpg combined 5.9 L V8 |
| Drivetrain | 360 V8, 727 three-speed automatic, Selec-Trac NP229 with 2.6:1 low range, Dana 44 front, 2.73:1 axles 1989 spec |
Wheels & tires
| Factory tire | P235/75R15 (Michelin Tru Seal self-sealing radial standard from 1987) |
|---|---|
| Bolt pattern | 6x139.7 (6x5.5") |
| Center bore | 108 mm |
Open the Jeep Grand Wagoneer (SJ) in the tire fitment tool →
Common Jeep Grand Wagoneer (SJ) repairs
- Rebuild the Motorcraft 2150 or convert to throttle-body injectionDIFFICULTY 2 / 5 (rebuild) · 3 / 5 (TBI)
- Replace the rear main seal (AMC 360)DIFFICULTY 3 / 5
- Fix a dead power window (flex rack and motor)DIFFICULTY 2 / 5
- Revive the tailgate windowDIFFICULTY 2 / 5
- Patch floors, rockers and lower quartersDIFFICULTY 4 / 5
- Drop the fuel tank and replace the skid plate and strapsDIFFICULTY 3 / 5
- Selec-Trac won't engage: vacuum system and transfer-case serviceDIFFICULTY 2 / 5
Always confirm torque figures, fluids and capacities against the factory service manual for your VIN. See the disclaimer; some parts links are affiliate links.