« previous next »
Pages: [1]   Go Down

Author Topic: how to get the right speed  (Read 3202 times)

Offline weebo74

  • Newbie
  • Posts: 20
how to get the right speed
« on: April 05, 2009, 09:03:31 pm »
ok so here we go i got a 1979 k10 4x4 it has 35" tries got the truck about a month ago got the thing running right and put a new speedo cable and the truck is way off is there any way to fix this thanks for all the info
Logged

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19184
Re: how to get the right speed
« Reply #1 on: April 05, 2009, 09:09:57 pm »
More info about your drivetrain needed.
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Lt.Del

  • Andy aka:SgtDel
  • Senior Member
  • ****
  • Posts: 3864
  • DelbridgePhotography.com
    • www.delbridge.net
Re: how to get the right speed
« Reply #2 on: April 05, 2009, 09:15:36 pm »
every large town has a shop that works on calibrations.  Any tranny shop could calibrate it for you.  it is a common thing, anytime you change ratios, tranny type, wheel/tire size etc. 

Logged

Offline bfofish

  • Too Many Toys..... Not Enough Time
  • Frequent Member
  • **
  • Posts: 298
Re: how to get the right speed
« Reply #3 on: April 05, 2009, 09:41:40 pm »
An old trick I was taught years ago, go out to the highway and time yourself between the mile markers.If it takes you 60 seconds you are going 60mph ect......
Then you at least have an idea how far off your speedo is.
I know my Blazer is off by 10 at 55mph with a 4" lift and 35" tires.
Your best bet is a tranny shop or 4X4 shop to get the correct speedo gear for your trans.
Logged
1987 Stepside 2wd , 2003 Silverado 1500HD Crew Cab

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: how to get the right speed
« Reply #4 on: April 06, 2009, 12:22:36 am »
mines off by 3 mph w 38's but i also got the digital gages and with them you turn them on and drive a mile or have another vehicle drive in front of you at a "known speed" and set it. that was pretty much the reason i was able to talk the wife into letting me get them lol
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline choptop

  • Senior Member
  • ****
  • Posts: 2476
  • Extended cab fanatic
    • conversiontrucks
Re: how to get the right speed
« Reply #5 on: April 06, 2009, 11:14:18 am »
I use my GPS. Just move it from truck to truck.
Logged
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab
Pages: [1]   Go Up
« previous next »