HELP, I changed gears and threw off my speedo. I did a gear swap in my 90' RS which had 2.73's that I swapped with 3.42's. Its thrown my speedo off big time and I need to know how to fix it. I did a massive search of all sorts and never really got the answer. From what I gathered, all I have to do is find the right gears in the transmission right? Does this apply to 700R4 with an electric speedo? If so what gears do I need and where can I find them? Please Help!

 

Yes the 700r4 with the electronic speedo has plastic gears that need to be changed. You can get the right ones from www.700r4.com Also, if I were you, I would get one of the driven gear retaining clips for just a couple dollars incase you break the original like I did.

 

How tough is it to change the speedometer gears so they read right? How long would it take a shop??

 

I just ordered my gear kit, so as soon as its done I'll give ya the details.

 

On an auto tranny its quite simple. Get under the car, remove the driveshaft, unbolt the tailshaft from the tranny and swap the gears. Take your time and you can do it in less than an hour.

Swapping gears on a manual requires complete removal of the transmission in order to get to the drive gear. I took my time to learn and it took me 2 days. I could easily do it again in a few hours.