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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

speedometer correction. what is needed??

  • Thread starter Thread starter damage inc.
  • Start date Start date Jun 15, 2004
D

damage inc.

New Member
Apr 19, 2004
9
0
0
Jun 15, 2004
#1
  • Jun 15, 2004
  • #1
my buddy just dropped his 98 gt off to get his 4.10s in. its a t 45 car. what all is needed to correct the speedometer?? i was led to believe just the little plastic gear in the transmission? is this correct??
 

MachAzure

New Member
May 9, 2003
133
0
0
Atlanta, GA
Jun 15, 2004
#2
  • Jun 15, 2004
  • #2
You cannot get a speedometer gear with enough teeth to compensate for the 4.10 gear ratio on the t-45. THe highest possible speedo gear is a 23 tooth which compensates up to a 3.55 gear.

To get the speedo accurate- I would get the Dallas Mustang speed cal
http://www.dallasmustang.com/index.mvc?Session_ID=6a5140af0bbde7114b37f2b1c30dd1a3&p=9910

This way, he can correct for the gear change and any future tire diameter changes.

Plus, it is a very simple install- you only have to splice into one wire.
 

Cobra Jay

Member
Apr 7, 2004
889
0
16
Motor City
Jun 15, 2004
#3
  • Jun 15, 2004
  • #3
MachAzure said:
You cannot get a speedometer gear with enough teeth to compensate for the 4.10 gear ratio on the t-45. THe highest possible speedo gear is a 23 tooth which compensates up to a 3.55 gear.

To get the speedo accurate- I would get the Dallas Mustang speed cal
http://www.dallasmustang.com/index.mvc?Session_ID=6a5140af0bbde7114b37f2b1c30dd1a3&p=9910

This way, he can correct for the gear change and any future tire diameter changes.

Plus, it is a very simple install- you only have to splice into one wire.
Click to expand...


 
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