Dodge Ram 1500
2002–05 4x4

Factory gearing, tires, angles and brakes for the Ram 1500, 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

140.5 in wheelbase · 37.5 in front · 49.7 in rear overhang

Stock tireP245/70R1730.5 in tall

Axle ratio3.55–3.92Factory, by trim

Crawl ratio45.1:1Best trim: 4.7L V8, 6-speed manual (2005)

Angles20.1 · 17.8 · 26.7°Approach, breakover, departure

Clearance8 in7.3 to 8 in by trim

Highway mpg16EPA

Tire upgrades, worked out

ST/SLT 4.7L V8, 5-speed manual (2002-04), 3.55s, from P245/70R17

Tire	Height	Under the diffs	Speedo at 65	RPM at 65	Gears for daily	In Tire size
265/70R17	31.6 in	+0.6 in	63 mph	1,791	Keep 3.55s	In Tire size →
285/70R17	32.7 in	+1.1 in	61 mph	1,731	3.92	In Tire size →
33x10.50R17	33.0 in	+1.2 in	60 mph	1,716	3.92	In Tire size →
33x12.50R17	33.0 in	+1.2 in	60 mph	1,716	3.92	In Tire size →
255/80R17	33.1 in	+1.3 in	60 mph	1,713	3.92	In Tire size →
285/75R17	33.8 in	+1.7 in	59 mph	1,674	3.92	In Tire size →
315/70R17	34.4 in	+1.9 in	58 mph	1,648	3.92	In Tire size →
35x11.50R17	35.0 in	+2.2 in	57 mph	1,618	4.1	In Tire size →
35x12.50R17	35.0 in	+2.2 in	57 mph	1,618	4.1	In Tire size →
37x11.50R17	37.0 in	+3.2 in	54 mph	1,530	4.56	In Tire size →
37x12.50R17	37.0 in	+3.2 in	54 mph	1,530	4.56	In Tire size →

Stock turns 1,856 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

6 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Use in the calculators
ST/SLT 4.7L V8, 5-speed manual (2002-04)	P245/70R17	5-speed manual	3.55 / 3.92	20.1 · 17.8 · 26.7	8.0 in	Use →
SLT 4.7L/5.9L V8 automatic (2002-03)	P265/70R17	4-speed automatic, 4-speed automatic	3.55 / 3.92	20.1 · 17.8 · 26.7	8.0 in	Use →
4.7L V8, 6-speed manual (2005)	P245/70R17	6-speed manual	3.55 / 3.92	18.3 · 21.1 · 25.8	7.3 in	Use →
SLT/Laramie 4.7L or 5.7L HEMI, 5-speed auto	P265/70R17	5-speed automatic	3.55 / 3.92	18.3 · 21.1 · 25.8	7.3 in	Use →
Off-Road Group / TRX4, 3.92 anti-spin	LT275/70R17	6-speed manual, 5-speed automatic	3.92	20.1^* · 17.8^* · 26.7^*	8.0 in^*	Use →
SLT/Sport 20-in. wheel group	P275/60R20	5-speed automatic	3.55 / 3.92	20.1^* · 17.8^* · 26.7^*	8.0 in^*	Use →

* The maker doesn’t publish this figure for that trim, so it shows the closest trim’s (same tire where we have one), or a close relative’s that shares the same body or front end. Hover the star to see which.

Size

Wheelbase: 140.5 in
Front overhang: 37.5 in
Rear overhang: 49.7 in
Height: 77 in
Body: Pickup
Stock tires: LT275/70R17, P245/70R17, P265/70R17, P275/60R20

Transmissions and low range

5-speed manual (NV3500): 4.04 · 2.33 · 1.39 · 1 · 0.73
4-speed automatic (45RFE): 3 · 1.67 · 1 · 0.75
4-speed automatic (46RE, 5.9L): 2.45 · 1.45 · 1 · 0.69
6-speed manual (Getrag 238): 4.23 · 2.53 · 1.67 · 1.23 · 1 · 0.79
5-speed automatic (545RFE): 3 · 1.67 · 1 · 0.75 · 0.67
Low range, nv241: 2.72:1
Low range, nv243: 2.72:1
Low range, nv244: 2.72:1

Axles

Front: Chrysler 9.25 in IFS front
Rear: Chrysler 9.25 in
3.55 ratio: ST/SLT 4.7L V8, 5-speed manual (2002-04), SLT 4.7L/5.9L V8 automatic (2002-03), 4.7L V8, 6-speed manual (2005), SLT/Laramie 4.7L or 5.7L HEMI, 5-speed auto, SLT/Sport 20-in. wheel group
3.92 ratio: ST/SLT 4.7L V8, 5-speed manual (2002-04), SLT 4.7L/5.9L V8 automatic (2002-03), 4.7L V8, 6-speed manual (2005), SLT/Laramie 4.7L or 5.7L HEMI, 5-speed auto, Off-Road Group / TRX4, 3.92 anti-spin, SLT/Sport 20-in. wheel group
Ratios made for it: 3.92 · 4.1 · 4.56 · 4.88

Brakes

Front rotor: 13.23 in, 336 mm
Front caliper piston: 54.0 mm
Rear rotor: 13.86 in, 352 mm
Rear: disc (ventilated)

Suspension

Front: double wishbone IFS (upper and lower A arms), torsion bars
Rear: leaf springs, solid axle
Rear layout: Leaf springs
Front sway bar: Factory bar
Work out yours: Wheel travel and flex with your parts

Fuel economy

EPA highway, automatic: 16 mpg
EPA highway, manual: 16 mpg
Rated years: 2002–2005, 4WD

Roof and stability

Roof load limit: The 2006 owner's manual's vehicle loading section (p. 309-310) prints no roof load figure. 2006 owner's manual: no roof rack / roof load entry. No roof load published anywhere found. Owner's manuals (US; the Australian RHD Ram manual is the same book) have no roof rack or roof load entry. Mopar sells no roof rack or crossbar for Ram pickups (the Mopar 'Roof Rack Crossbars' parts that come up, 68442426AC and 82216036AC, are Jeep Grand Cherokee / Wagoneer parts). rambodybuilder.com blocks automated fetches (robots) and the search index shows no roof-load topic in the Ram Body Builder's Guide. Aftermarket racks for the cab (Front Runner, Prinsu, upTOP) publish only their own ratings.
Roof: Pickup, cab and bed
Static stability factor: 1.15, NHTSA 2002, 3-star rollover
Rack and tent: Roof rack and tent calculator

Brake upgrades

What bigger tires need →

Baer Extreme+ 15 in front brake system 4141022+16% brake torque13.2 → 15.0 in rotor · 6-piston · 19 in wheels or biggerNo price shown on the Baer page.

Aftermarket bumpers

7 listed

Makers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it with the Clearance calculator and every owner of this Ram 1500 sees how it does on their tires and lift.

Front 3

Coastal Offroad 3rd Gen Dodge Ram Front Winch Bumper Kit$718 · winch ready
Frontier Truck Gear Frontier 300-40-3005 Dodge Ram 1500 2003-2005 Original Front Bumper196 lb · $1,761
Iron Bull Bumpers Iron Bull Custom Front Bumper Dodge Ram 1500 2002-2005 #12$2,599

Rear 4

Every calculator, set up for the Ram 1500

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 ClearanceReal angles from a tape, and the bumpers that fit.Measure your angles Build sheetEvery part and number on your truck, on one sheet.Start a build sheet LeaderboardsWhere the Ram 1500 ranks against every stock truck.See where it ranks

Source: media.stellantisnorthamerica.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.

Dodge Ram 15002002–05 4x4