Chevrolet K5 Blazer
1969–72
Factory gearing, tires, angles and brakes for the K5 Blazer, 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.
Trims
4 we have figures for| Trim | Tire | Transmission | Axle | Angles | Clearance | Open |
|---|---|---|---|---|---|---|
| 307 V8, 4-speed, NP205 (E78-15B tires) | 26.6 | 4-speed manual | 3.73 | 35.2 · ~19.7 · 25 | 7.0 in | Use → |
| 350 V8, 4-speed or Turbo Hydra-matic, NP205 (E78-15B tires) | 26.6 | 4-speed manual, 3-speed automatic | 3.07 / 3.73 | 35.2 · ~19.7 · 25 | 7.0 in | Use → |
| 350 V8 with L78-15 on/off-road option (L78-15B tires) | 28.6 | 4-speed manual, 3-speed automatic | 3.07 / 3.73 | 35.2* · ~19.7 · 25* | 7.0 in* | Use → |
| 350 V8 with 10.00-16.5 flotation option (10.00-16.5C tires) | 31.0 | 4-speed manual, 3-speed automatic | 3.07 / 3.73 | 35.2* · ~19.7 · 25* | 7.0 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.
~ Estimated from the wheelbase and ground clearance. No maker has published it for this truck yet.
Size
- Wheelbase
- 104 in
- Front overhang
- 33.25 in
- Rear overhang
- 43.25 in
- Height
- 76 in
- Body
- SUV
- Stock tires
- 26.6, 28.6, 31.0
Transmissions and low range
- 4-speed manual (SM465 / CH465)
- 6.55 · 3.58 · 1.7 · 1
- 3-speed automatic (Turbo Hydra-matic 350)
- 2.52 · 1.52 · 1
- Low range, np205
- 1.96:1
- Low range, dana20
- 2.03:1
Axles
- Front
- Dana 44 (K10 front)
- Rear
- GM 12-bolt 8.875 in
- 3.07 ratio
- 350 V8, 4-speed or Turbo Hydra-matic, NP205 (E78-15B tires), 350 V8 with L78-15 on/off-road option (L78-15B tires), 350 V8 with 10.00-16.5 flotation option (10.00-16.5C tires)
- 3.73 ratio
- 307 V8, 4-speed, NP205 (E78-15B tires), 350 V8, 4-speed or Turbo Hydra-matic, NP205 (E78-15B tires), 350 V8 with L78-15 on/off-road option (L78-15B tires), 350 V8 with 10.00-16.5 flotation option (10.00-16.5C tires)
- Ratios made for it
- 3.73 · 4.1 · 4.56 · 4.88 · 5.13
Brakes
- Front rotor
- 11.86 in, 301 mm
- Front caliper piston
- 75.0 mm
- Rear drum
- 11.00 in, 279 mm
- Rear
- drum (11 x 2 in)
Suspension
- Front
- solid axle on leaf springs
- Rear
- leaf springs, solid axle
- Rear layout
- Leaf springs
Fuel economy
- Highway, not EPA rated
- about 10 mpg
- Where it comes from
- Road test, steady 45 mph (1973 K5 Blazer 350 V8 (175 hp), automatic, full-time 4WD (2nd gen, proxy))
- Source
- en.wikipedia.org
Aftermarket bumpers
2 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 on the rig page and every owner of this K5 Blazer sees how it does on their tires and lift.
Front 2
Rear
None listed yet.
Every calculator, set up for the K5 Blazer
Source: auto-brochures.com. Dana 44 carriers split at 3.73 and down vs 3.92 and up; GM 12-bolt carriers split at 3.73 and down vs 3.90 and up (3-series vs 4-series).
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.