View Full Version : 4.10 Gears

07-14-2005, 06:02 PM
i recently bought a 98 cobra that has 4.10 gears and the speedometer is off. do i need a chip to recalibrate the speedometer? and if so which one is recommended. thanx for the help

07-14-2005, 08:02 PM
I hear you change the gear on the speedometer cable.

07-14-2005, 08:26 PM
A couple different ways to correct the speedo. I used a speedcal from
Dallas Mustang. Work great and easy to install. Programmers and chips
can solve the problem too.

07-14-2005, 08:35 PM
I'm told the 98's have to be calibrated manualy. Is that not true?

07-15-2005, 07:05 AM
i just put a speedo gear in my 97. (4.10 in there) :thumbsup:

07-15-2005, 08:58 AM
yeah, it is a plastic (I think) gear that gets installed. They are around $15.

07-19-2005, 06:59 AM
Let us know which speedo gear you get. I'm fixin to put 4:10's in my 98.

07-19-2005, 10:41 AM
Let us know which speedo gear you get. I'm fixin to put 4:10's in my 98.

Its the 23 tooth gear, don't know the part # but you won't need it... just get the 23 toother.

07-19-2005, 09:02 PM
Hey you yellow bellied sap sucker, where did you get those new dyno numbers from? You must really be pissed at Jeff, huh? :)

07-20-2005, 12:06 PM
where did you get those new dyno numbers from?

n i t r o u s .
Mmmmm-good. :D

It's proving to be a b!tch to tune though....

07-21-2005, 08:54 PM
You will need to do either the speedo gear or the speedcal. You cannot have the speedo recalibrated by a chip unfortunately in a 96-98 model. I recommend the speed cal. It is more accurate than a speedo gear, and it will not wear out (speedo gear's teeth will wear down over time).

07-26-2005, 01:01 PM
thanx for all the help...where should i get the speedcal and is it easy to install?

07-26-2005, 05:25 PM
SpeedCal is easy to install. Common hand tools and jack stands, I'll
send you scanned copies of the instructions.

Go to www.dallasmustang.com to buy a SpeedCal unit.

Good Luck.

(edit) Found the Installation Instruction link instead http://www.dallasmustang.com/index.mvc?s=SpeedCal_Inst


07-26-2005, 05:37 PM
thanx for your help