Jeep Wagoneer / Grand Wagoneer
SJ 1980–91

Factory gearing, tires, angles and brakes for the Wagoneer / Grand Wagoneer, and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.

Use this truck in the calculators

108.7 in wheelbase · 31.3 in front · 46.4 in rear overhang

Stock tireP225/75R1528.3 in tall

Axle ratio2.73–3.31Factory, by trim

Crawl ratio21.1:1Best trim: Wagoneer Custom / Limited 1981-83 (P225/75R15)

Angles33 · 18 · 17°Approach, breakover, departure

Clearance7.7 inFactory figure

Highway mpg12EPA, 17 with the manual

Tire upgrades, worked out

Wagoneer Custom / Limited 1981-83 (P225/75R15), 3.31s, from P225/75R15

Tire	Height	Under the diffs	Speedo at 65	RPM at 65	Gears for daily	Open
235/75R15	28.9 in	+0.3 in	64 mph	2,504	Keep 3.31s	Open →
31x10.50R15	31.0 in	+1.4 in	59 mph	2,333	3.73	Open →
32x11.50R15	32.0 in	+1.9 in	57 mph	2,260	3.73	Open →
33x10.50R15	33.0 in	+2.4 in	56 mph	2,191	3.91	Open →
33x12.50R15	33.0 in	+2.4 in	56 mph	2,191	3.91	Open →
35x12.50R15	35.0 in	+3.4 in	53 mph	2,066	4.1	Open →

Stock turns 2,557 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

2 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Open
Wagoneer Custom / Limited 1981-83 (P225/75R15)	P225/75R15	Chrysler TorqueFlite 727 3-speed automatic	3.31	33 · 18 · 17	7.7 in	Use →
Grand Wagoneer 1984-91, 360 V8 (P235/75R15)	P235/75R15	Chrysler TorqueFlite 727 3-speed automatic	2.73 / 3.31	33 · 18 · 17	7.7 in	Use →

Size

Wheelbase: 108.7 in
Front overhang: 31.3 in
Rear overhang: 46.4 in
Height: 66 in
Body: SUV
Stock tires: P225/75R15, P235/75R15

Transmissions and low range

Chrysler TorqueFlite 727 3-speed automatic (V8): 2.45 · 1.45 · 1
Low range, part-time (np208): 2.6:1
Low range, selec-trac (np229): 2.6:1

Axles

Front: Dana 44
Rear: AMC 20 (semi-floating)
2.73 ratio: Grand Wagoneer 1984-91, 360 V8 (P235/75R15)
3.31 ratio: Wagoneer Custom / Limited 1981-83 (P225/75R15), Grand Wagoneer 1984-91, 360 V8 (P235/75R15)

Brakes

Front rotor: 11.87 in, 301 mm
Front caliper piston: 75.0 mm
Rear drum: 11.00 in, 279 mm
Rear: drum (11 x 2.5 in)

Suspension

Front: solid axle on leaf springs
Rear: leaf springs, solid axle
Rear layout: Leaf springs

Fuel economy

EPA highway, automatic: 12 mpg
EPA highway, manual: 17 mpg
Rated years: 1984–1991, 4WD

Every calculator, set up for the Wagoneer / Grand Wagoneer

Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tires RegearHighway RPM on every ratio and mpg.Pick your gears Crawl ratioHow slow it creeps, against other trucks.Work out crawl SpeedometerWhat it really reads on new tires.Fix your speedo LinksAnti-squat and what a lift does to it.Check your links Your rigBuild sheet and measured angles.Start a build sheet LeaderboardsWhere the Wagoneer / Grand Wagoneer ranks against every stock truck.See where it ranks

Source: auto-brochures.com.

Use at your own risk. These calculators are here to help you plan and to inform your decisions, not to sign off on a build. Many numbers are estimates worked out from factory figures, and some factory figures are not yet confirmed. Check every number against your own truck, its manuals and a qualified shop before you buy parts, cut, weld, lift, regear or drive on it. Long Range Desert Tools is not liable for anything you do based on these calculators or their results. The full terms are in our policies.

Jeep Wagoneer / Grand WagoneerSJ 1980–91