sethg702 Posted February 11, 2013 Report Share Posted February 11, 2013 hey guys,How do I correct my speedometer? Do I need a hand held tuner? If thats the case Ill hold off cause of the money ($350+) I have a 3.73 gear ratio in the rear end. Would that have anything to do with it? Im running 275-40/R17, maybe thats throwing it off as well. Link to comment Share on other sites More sharing options...
Blackmage Posted February 11, 2013 Report Share Posted February 11, 2013 what year and model? most are done by a handheld tuner, or speed-cal. i believe you can do the older ones with new speedo-gears in the trasmission and on the speed sensor. Link to comment Share on other sites More sharing options...
sethg702 Posted February 11, 2013 Author Report Share Posted February 11, 2013 what year and model? most are done by a handheld tuner, or speed-cal. i believe you can do the older ones with new speedo-gears in the trasmission and on the speed sensor.94 gt 5.0 vortech supercharged Link to comment Share on other sites More sharing options...
Slykin Posted February 11, 2013 Report Share Posted February 11, 2013 You need a new speedometer gear. Maybe two. Unless someone already crammed a 7 tooth drive gear in the transmission, you'll need that, plus a 21 tooth speedo gear that goes into the side of the trans. The drive gear you have to install by removing the tailshaft of the transmission. [TABLE=width: 65%][TR][TD=width: 37%, bgcolor: #FFFFFF, align: center]Rear end ratio / Speedometer drive[/TD][TD=width: 32%, bgcolor: #FFFFFF, align: center]Seven (7) tooth drive[/TD][TD=width: 32%, bgcolor: #FFFFFF, align: center]Eight (8) tooth drive[/TD][/TR][TR][TD=width: 37%]3.27[/TD][TD=width: 32%]18[/TD][TD=width: 32%]21[/TD][/TR][TR][TD=width: 37%]3.55[/TD][TD=width: 32%]20[/TD][TD=width: 32%]23[/TD][/TR][TR][TD=width: 37%]3.73[/TD][TD=width: 32%]21[/TD][TD=width: 32%]n/a[/TD][/TR][TR][TD=width: 37%]4.10[/TD][TD=width: 32%]23[/TD][TD=width: 32%]n/a[/TD][/TR][/TABLE] Link to comment Share on other sites More sharing options...
Det_Riot Posted February 11, 2013 Report Share Posted February 11, 2013 You're gonna need one of these for your speedometer:http://www.cjponyparts.com/Category.aspx?ss=&c=30190200&sb=&sd=&pgnum=1&pgsize=&filter=and idk where there are bout one for your odometer as well. STEVE@CJPP, HOOK A BROTHA UP! Link to comment Share on other sites More sharing options...
Slykin Posted February 11, 2013 Report Share Posted February 11, 2013 You're gonna need one of these for your speedometer:http://www.cjponyparts.com/Category.aspx?ss=&c=30190200&sb=&sd=&pgnum=1&pgsize=&filter=and idk where there are bout one for your odometer as well. STEVE@CJPP, HOOK A BROTHA UP!It would be fairly safe to assume this too. http://www.cjponyparts.com/t5-7-tooth-speedometer-drive-gear-yellow-stock-1983-1998/p/HW2240/ Link to comment Share on other sites More sharing options...
sethg702 Posted February 11, 2013 Author Report Share Posted February 11, 2013 You're gonna need one of these for your speedometer:http://www.cjponyparts.com/Category.aspx?ss=&c=30190200&sb=&sd=&pgnum=1&pgsize=&filter=and idk where there are bout one for your odometer as well. STEVE@CJPP, HOOK A BROTHA UP!Thanks for the responses, I noticed all these speedo gears are really cheap. The installation process sounds like a pain in the ass tho...sounds like shop time. Lame Link to comment Share on other sites More sharing options...
Slykin Posted February 11, 2013 Report Share Posted February 11, 2013 The little gears are REALLY easy to install, it's the drive gear that is a pain. The little speedometer gear just requires that you remove one bolt and the gear/sender come right out without a mess. Now the driven gear inside the tranny is a PITA. I replaced mine this winter :/ Link to comment Share on other sites More sharing options...
sethg702 Posted February 11, 2013 Author Report Share Posted February 11, 2013 The little gears are REALLY easy to install, it's the drive gear that is a pain. The little speedometer gear just requires that you remove one bolt and the gear/sender come right out without a mess. Now the driven gear inside the tranny is a PITA. I replaced mine this winter :/Sooo....droping the the tranny is a must for that drive gear? I might just have to live with a thrown off speedo. Or I can do it when I decide to replace my main bearing seal, its not leaking enough to leave a spot on the garage floor but it should be done. Link to comment Share on other sites More sharing options...
Det_Riot Posted February 11, 2013 Report Share Posted February 11, 2013 If you just have to remove the tailshaft you might not even have to remove the trans. I don't know though. i'm just speculating. Link to comment Share on other sites More sharing options...
Blackmage Posted February 11, 2013 Report Share Posted February 11, 2013 You dont have to drop the trani. This is from some previous work i needed to do in it, but you can clearly see the green gear that you will need to replace. its not that bad. Pull the shifter out, theres a roll pin up top that you need to pop out where the shifter sits into, take the d/s out, pull the bolts on the tail shaft, slide her out. This was on a t-45, but pretty close to the same. Link to comment Share on other sites More sharing options...
64bit_Tuning Posted February 11, 2013 Report Share Posted February 11, 2013 Im surprised that not a single one of you recommended a Speedcal... Link to comment Share on other sites More sharing options...
Blackmage Posted February 11, 2013 Report Share Posted February 11, 2013 (edited) Im surprised that not a single one of you recommended a Speedcal...Nope, not one of us did. When you do rear end gears, the speedo gears are the cheapest way to correct the speedo.what year and model? most are done by a handheld tuner, or speed-cal. i believe you can do the older ones with new speedo-gears in the trasmission and on the speed sensor.Heres AM's http://www.americanmuscle.com/ford-speedo-tool-9410.html, they run about $124. Edited February 11, 2013 by Blackmage Link to comment Share on other sites More sharing options...
joekd Posted February 11, 2013 Report Share Posted February 11, 2013 Don't EVER get the dallas mustang speedcal, use the ford racing one, it is 1000% more user friendly Link to comment Share on other sites More sharing options...
revhead347 Posted February 11, 2013 Report Share Posted February 11, 2013 Nope, not one of us did. When you do rear end gears, the speedo gears are the cheapest way to correct the speedo.Heres AM's http://www.americanmuscle.com/ford-speedo-tool-9410.html, they run about $124.Amen. I don't know why everyone is running around recommending a $124 speedcal when all you need is a $11 speedo gear. This is the best resource I have found on speedo gears.http://www.tciauto.com/tc/speedometer-gear-calculatorKurt Link to comment Share on other sites More sharing options...
sethg702 Posted February 11, 2013 Author Report Share Posted February 11, 2013 its always the case with cheap parts needing to be installed, and then labor screws you over. Whats this speedcal you guys speak of? If thats 124 bucks I might be looking at doing the speedo gear swap for an even amount or maybe more. (parts+labor?) Im in a limited garage setting with all the normal hand tools. I still need a set of jack stands. Taking off my tail section of tranny might be a little interesting. I dont have a lift or a trans jack for underneath the car Ive noticed its all about the tools when it comes to working on a car. Link to comment Share on other sites More sharing options...
sethg702 Posted February 12, 2013 Author Report Share Posted February 12, 2013 nvm...Looked up the speedcal Link to comment Share on other sites More sharing options...
joekd Posted February 12, 2013 Report Share Posted February 12, 2013 Amen. I don't know why everyone is running around recommending a $124 speedcal when all you need is a $11 speedo gear. Because the speedo gear gets close but not always correct. You will notice that usually the same gear is recommended for 3.73 and 4.10's, I will stick with my $12o ford speedcal which is perfect when compared against GPS thank you. It also doesn't have the multiple reported failures that the gears do Link to comment Share on other sites More sharing options...
Slykin Posted February 12, 2013 Report Share Posted February 12, 2013 Because the speedo gear gets close but not always correct. You will notice that usually the same gear is recommended for 3.73 and 4.10's, I will stick with my $12o ford speedcal which is perfect when compared against GPS thank you. It also doesn't have the multiple reported failures that the gears doIt's correct as long as you change the driven gear inside. A lot of guys try to half ass it by putting a gear in that doesn't mesh perfectly and "get close enough" because they don't want to mess with the driven gear. This'll eat gears and throw off your speedometer. Link to comment Share on other sites More sharing options...
64bit_Tuning Posted February 13, 2013 Report Share Posted February 13, 2013 Amen. I don't know why everyone is running around recommending a $124 speedcal when all you need is a $11 speedo gear. This is the best resource I have found on speedo gears.http://www.tciauto.com/tc/speedometer-gear-calculatorKurtbecause you can't accurately and reliably correct for anything past 3.55 gears in an automatic car. In a T5, I will always recommend a gear change... but you really need an electronic means for calibrating a high geared auto. Link to comment Share on other sites More sharing options...
