Dodge Ram 1500
2006–08 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.
Stock tireP245/70R1730.5 in tall
Axle ratio3.55–3.92Factory, by trim
Crawl ratio45.1:1Best trim: 4.7L V8, 6-speed manual (2006-08)
Angles18.3 · 21.1 · 25.8°Approach, breakover, departure
Clearance9.6 inFactory figure
Highway mpg17EPA, 16 with the manual
Tire upgrades, worked out
4.7L V8, 6-speed manual (2006-08), 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 | 1,939 | Keep 3.55s | In Tire size → |
| 285/70R17 | 32.7 in | +1.1 in | 61 mph | 1,873 | 3.92 | In Tire size → |
| 33x10.50R17 | 33.0 in | +1.2 in | 60 mph | 1,857 | 3.92 | In Tire size → |
| 33x12.50R17 | 33.0 in | +1.2 in | 60 mph | 1,857 | 3.92 | In Tire size → |
| 255/80R17 | 33.1 in | +1.3 in | 60 mph | 1,853 | 3.92 | In Tire size → |
| 285/75R17 | 33.8 in | +1.7 in | 59 mph | 1,811 | 3.92 | In Tire size → |
| 315/70R17 | 34.4 in | +1.9 in | 58 mph | 1,783 | 3.92 | In Tire size → |
| 35x11.50R17 | 35.0 in | +2.2 in | 57 mph | 1,751 | 4.1 | In Tire size → |
| 35x12.50R17 | 35.0 in | +2.2 in | 57 mph | 1,751 | 4.1 | In Tire size → |
| 37x11.50R17 | 37.0 in | +3.2 in | 54 mph | 1,656 | 4.56 | In Tire size → |
| 37x12.50R17 | 37.0 in | +3.2 in | 54 mph | 1,656 | 4.56 | In Tire size → |
Stock turns 2,009 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.
Trims
4 we have figures for| Trim | Tire | Transmission | Axle | Angles | Clearance | Use in the calculators |
|---|---|---|---|---|---|---|
| 4.7L V8, 6-speed manual (2006-08) | P245/70R17 | 6-speed manual | 3.55 / 3.92 | 18.3 · 21.1 · 25.8 | 9.6 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 | 9.6 in* | Use → |
| Off-Road Group / TRX4, 3.92 anti-spin | LT275/70R17 | 6-speed manual, 5-speed automatic | 3.92 | 20.9 · 24.6 · 27.5 | 9.6 in | Use → |
| SLT/Sport 20-in. wheel group | P275/60R20 | 5-speed automatic | 3.55 / 3.92 | 20.9 · 24.6 · 27.5 | 9.6 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
- 39.3 in
- Rear overhang
- 47.9 in
- Height
- 77 in
- Body
- Pickup
- Stock tires
- LT275/70R17, P245/70R17, P265/70R17, P275/60R20
Transmissions and low range
- 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, nv243
- 2.72:1
- Low range, nv246
- 2.72:1
Axles
- Front
- Chrysler 9.25 in IFS front
- Rear
- Chrysler 9.25 in
- 3.55 ratio
- 4.7L V8, 6-speed manual (2006-08), SLT/Laramie 4.7L or 5.7L HEMI, 5-speed auto, SLT/Sport 20-in. wheel group
- 3.92 ratio
- 4.7L V8, 6-speed manual (2006-08), 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, coil-over shocks
- Rear
- leaf springs, solid axle
- Rear layout
- Leaf springs
Fuel economy
- EPA highway, automatic
- 17 mpg
- EPA highway, manual
- 16 mpg
- Rated years
- 2006–2008, 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
- Width
- 80 in unconfirmed
- Track
- 68 in front, 67.9 in rear
- Curb weight
- 5,216 lb unconfirmed
- GVWR
- 6,700 lb unconfirmed
- Payload
- 1,484 lb unconfirmed
- Static stability factor
- 1.18, NHTSA 2006, 4-star rollover
- Bed
- 75 in long · 66 in wide · rails 20 in above the floor
- 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
13 listedMakers 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 8
- ARB 3452030 Dodge Ram 1500 2006-2008 Deluxe Front Bumper Winch Ready with Grille Guard, Black Powder Coat Finish260 lb · $2,921 · winch ready
- Coastal Offroad 3rd Gen Dodge Ram Front Winch Bumper Kit$718 · winch ready
- Fusion Bumpers Fusion 0608RM1500FB Dodge Ram 1500 2006-2008 Front Bumper$2,634
- Ranch Hand FBD061BLR 2006-2009 Dodge Ram 2500/3500 & 1500 Mega Cab Legend Series Front Bumper$2,165
- Throttle Down Kustoms BU0608D1500 Dodge Ram 1500 2006-2008 Front Bumper$2,260
- Tough Country Traditional Front Bumper Dodge Ram 1500 2006-2008 (Non Mega Cab) TFR0615DLRESM$2,471
- TrailReady 11601B Dodge Ram 1500 2006-2008 Extreme Duty Front Bumper Winch Ready Base$3,654 · winch ready
- Truck Defender Aluminum Front Bumper Dodge Ram 1500 2006-2008 Standard Polished 1D-0608$3,221
Rear 5
- Fusion Bumpers Fusion 0308RM1500RB Dodge Ram 1500 2003-2009 Rear Bumper$2,040
- Hammerhead 600-56-0529 Dodge Ram 1500 2003-2009 Rear Bumper Flush Mount106 lb · $1,764
- Iron Bull Bumpers Iron Bull Custom Rear Bumper 2002-2008 Dodge Ram 1500 #17$2,332
- Ranch Hand SBD031BLL 2002-2008 Dodge Ram 1500 Sport Back Bumper$1,051
- Throttle Down Kustoms RNO06081500 Dodge Ram 1500 2006-2008 Rear Bumper$1,870
Every calculator, set up for the Ram 1500
Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tiresRegearHighway RPM on every ratio and mpg.Pick your gearsCrawl ratioHow slow it creeps, against other trucks.Work out crawlSpeedometerWhat it really reads on new tires.Fix your speedoLinksAnti-squat and what a lift does to it.Check your linksClearanceReal angles from a tape, and the bumpers that fit.Measure your anglesBuild sheetEvery part and number on your truck, on one sheet.Start a build sheetLeaderboardsWhere 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.