hey, i got a customer with a 78 chevy /auto tranny and 38's on. what can he do to recalibrate the speedo? any suggestions are appreciated
thanks eric

three things, take it to a speedo shop and get a new gear on the ind of the cable that comes out of the t-case, live with it, or do what i did and just take the needle off the speedo and put it back on in a different position. it doesnt make it accurate through all the range, but good enough to get a somewhat accurate freeway speed.

Dakota digital sales a great speedo available in a cluster that fits like it came from the factory or as a stand alone. I installed the cluster for 700 bucks because none of my gauges were working. But the speedo it self allows you to calibrate for any size tire, tranny, or rear end gear ratio. It is a little spendy but I think its worth it.

What trans and what gear ratio in the axles?

You can change the gear inside the tranfercase to get it where you want it to be..

Maybe this will help too..

http://www.bgsoflex.com/speedo1.html

http://www.csgnetwork.com/speedocalibcalc.html

You can change the gear inside the tranfercase to get it where you want it to be..

Maybe this will help too..

http://www.bgsoflex.com/speedo1.html

http://www.csgnetwork.com/speedocalibcalc.html

That is why I was asking what gear ratio and trans, I have a chart that even gives part numbers depending on application.

That is why I was asking what gear ratio and trans
It would be nice when people ask questions that they would provide the info needed to answer them :D

Or tell you where they live when they want parts shipped:shaking:

Or tell you where they live when they want parts shipped:shaking:
We must be reading the same threads :laughing:

if you guys read my first post again, it says a customers vehicle, and not mine. if i had more info, i would have posted it

I guess we are all wasting our time then.:shaking: