|
09-08-2008, 11:56 PM
|
#1 |
|
Registered User
Join Date: May 2005
Location: copperas Cove, TX
Posts: 85
|
Speedo Calibration
Since i went with smaller tire, the speedo is reading faster than i actually am going. Who calibrates it? tranny shop? or is there some sort of formula that there is to change out the spider gear myself?
thanx joe
__________________
1976 Red chevy steppy,  Proud service member, US ARMY 15Y, AH-64D Apache Longbow Armament, Avionics, Electronics technician |
|
|
|
09-09-2008, 03:25 AM
|
#2 |
|
In the Forgotten far North.
 
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
|
Re: Speedo Calibration
Contact TCI TRANSMISSIONS. They used to have a chart on their website that would help to calculate the proper speedo gears needed for the transmission after entering all the needed data ( tire diameter, gear ratio, tranny type) they may still have it on their site but I didn't find it myself.
Good luck and happy wrenching!!!
__________________
1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
|
|
|
|
09-09-2008, 03:49 AM
|
#3 |
|
Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
|
Re: Speedo Calibration
__________________
1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
|
|
|
|
09-09-2008, 09:55 AM
|
#4 |
|
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
|
Re: Speedo Calibration
Try different size gear combos. Find a combo closests to a whole number. Your read will be off over or under by a little.
|
|
|
|
|
09-09-2008, 06:45 PM
|
#5 |
|
www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
|
Re: Speedo Calibration
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
|
|
|
 |
| Bookmarks |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
