This is a discussion on Speedo help within the General Help forums, part of the LSx Technical Help Section category; Tires were changed from stock 16" to a 17" speedo is 10mph off how do i fix that stock tires ...
09-03-2008, 03:26 PM #1
Tires were changed from
stock 16" to a 17"
speedo is 10mph off how do i fix that
stock tires 245 50 16
new 315 35 17
09-03-2008, 04:27 PM #2
10mph off at what speed? Your speedo shouldn't be off by more than 1 to 2 mph at 60mph between the 2 tire sizes. They have less than .05 inches difference in overall height so basically the same circumference. Chances are you speedometer was off before you changed tire sizes.
09-03-2008, 04:49 PM #3
yep, the tire calculator says if your speedo says 65mph you're actually going 65.09mph so less than 1mph difference between those 2 sizes.
You can fix your speedo by getting a tune or with a handheld tuner. What makes you think it's 10mph off?
09-03-2008, 05:00 PM #4
Speedo off all speeds
dont know if factory gears were changed
09-03-2008, 05:04 PM #5
take it to a gm dealership and have them check it and fix it. Simplest way to take care of that.
09-03-2008, 05:12 PM #6
I feel its off because i fly by like
every one is sitting still
plus ive followed a few semis i know are govened speed at 62
and my speed reads 52
09-03-2008, 05:14 PM #7
Gm dealer told me to buy a
vss buffer ..
Would a tranny shop be able to help??
09-04-2008, 06:14 AM #8
- Join Date
- Dec 2005
- Laurel, Maryland
2000 Grand Prix GTP
- 2000 Trans Am WS6 M6
09-04-2008, 01:39 PM #9
All day every day im out there
i know what companys are and which
are not. But thank for a reply.
Stopped at tranny shop tonight they
said something about a drac modgule being bad
and to go the dealer??
09-04-2008, 02:05 PM #10
let us know how it works out for you
09-04-2008, 10:53 PM #11
- Join Date
- Aug 2005
- THE SWAMP
Light Pewter Metallic
- 2000 Camaro SS M6
It is simple to correct with tuning software or even a handheld tuner. But first, you need to know what the rear end gear is.
09-05-2008, 12:25 PM #12
Thanks that seems to be my best option
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By hamburger68 in forum General HelpReplies: 13Last Post: 01-04-2008, 07:18 AM
By The Scientist in forum Parts For Sale / TradeReplies: 0Last Post: 06-25-2007, 12:57 PM
By grandkodiak in forum Almost Anything GoesReplies: 4Last Post: 02-27-2006, 12:50 PM
By 94 six speed in forum General HelpReplies: 1Last Post: 01-17-2006, 11:06 PM
By beanie in forum Computer & TuningReplies: 1Last Post: 09-19-2005, 06:17 AM