Correcting the Speedo on 4R70W car.
 

Ok I have had my 3.73's in for a while and I havent corrected the Speedo yet. I havent really driven the car much either now that I think of it. Anyway, what is the best way to correct the speedo on a 96 Gt with the 4R70W. The ways I've heard of are, the speedo gear, an abbot box (Spelling?), A chip, ( I dont know which one?) and the Hypertech Power Programer. So whats the best way to go? Price isnt so much of a problem. Any help out there from people with 96-98 4R70W Stangs who have gears would be great or anyone who knows whats up. Thanks for the help.

All you need is a speedo gear for the 96-98 standard tranny modulars...

I'm not certain, but I think the 96-98 autos are the same...

Hammer is correct as always. The plastic gear for the auto is about 10 - 15 bucks and installs in minutes! I think brothers performance has them in there catalog.

The 99 up cars require a 100 dollar speedo calibrator or chip/programmer

I had the speedo gear installed in my auto, it's not accurate though. I am off by about 5MPH from about 50 and above. I know it's not supposed to be perfect. For my car the speedo gear for 3.73 and 4.10 are the same number of splines, so there's a marginal difference in real speed readings.

Steeda has the part you need part # 123 - 0023 - $ 15.95

That's the one I have... Like I mentioned, it's for the 3.55/3.73/4.10 and it's all the same part number. ... I guess you were talking to me, if not, then sorry for the reply... hehe

I was wondering about it before I had it installed, what's the deal with having the same number of teeth on a gear and saying it calibrates the speedo correctly if you use the same part for 3 different ratios... oh well, thank god we have police and those lovely radar guns.! :-D

Your best bet is a Dallas Mustang Speedcal. Expensive but accurate and worth the money. I don't think a computer chip can calibrate the speedo on 96-98 GT/Cobra's. Only on 99+ stangs.

Black4V
 

Can we get a link in this thread from you on where you buy that product......how much????

Thanks!
 

Hmmmmm.....big problem here!

I see that they pre set this for you! That sounds great, but I have two sets of tires....snow.....summer......

If you guys state that the Brothers one is not accurate at all....and this one they pre set........what am I to do...

This sucks....mucho polica.....no afforde tickete.....lose my insurance....hehehe....

I was thinking (like an idiot) that I could tell the speed by the gear and RPM's but not with new gears......hehehe....

This device uses a binary DIP switch to recalibrate it on the inside. If you look on the page, you can use their caclulator to custom tune it to what you need.

Thanks soooo much!
 

I didn't notice that.....thanks for the reply.....this looks like the way to go if you say it's more accurate......

Thanks a bunch!

I believe this device is also only for 5-Spd stangs.. I don't think it works for AODE/4R70W, the harness is different.

OK!
 

I have the 2001-5spd.....

Should work!

You might want to check on that. A friend of mine uses it on his 4R70W.