speedometer recalibraion. need help asap
Thread Starter
Junior Member
Joined: Mar 2004
Posts: 41
Likes: 1
From: tabernacle NJ
Car: 89 formula and my late 86 iroc R.I.P girl
Engine: 89 firebird formula-305 tbi,86 iroc 305 tpi
Transmission: both 700r4
speedometer recalibraion. need help asap
i need 2 know if there is anyway to recalibrate my speedometer. i just changed rear gears (went from 2.73 to 3.42) my tranny is auto (700r4) the sending unit and is electronic. this is starting to become a nightmare. (i just paid a ticket). any help would be a great help. thanks.
Member
Joined: Jan 2004
Posts: 218
Likes: 0
From: Bedford, PA
Car: 91Z28, 94 Silverado, 99Z28
Engine: 350 TPI, 350 TBI, LS1
Transmission: 700R4, 4L60E, 6-speed
Axle/Gears: 3.42, 3.42, 3.42
depending on the size of your tires will determine that speedo gears you need in the tranny... you can go to www.700r4.com and click on the speedo calculater to find the exact gears you need to put in and what you have now.. or post your tire size on here....
Supreme Member
iTrader: (2)
Joined: Jul 2003
Posts: 3,205
Likes: 0
From: Dallas, TX area
Car: 91 Formula WS6 (Black, T-Tops)
Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)
Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
Probably going to have to get the dakotadigital.com VSS converison box. THat's what I had to do when I went from my factory 10-bolt 3.42 to my Ford 9" 4.11s
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