I have an 88 GT convertible and I got a dash cluster from my buddies 93 GT I've heard many different things on here about doing the swap I'm trying to see if I pull the speedo out of his 93 and take the mechanism off the back do I need to remove the stop pin and let the needle fall down and swap it and then pick it back up and put the pin in and use the Whiteface 140 gauges if this will work properly for the calibration if anyone can let me know I would appreciate it. I dont really want to use his whole speedo and drill holes and file and cut stuff
Won't work.
You are better off selling the 90-93 cluster on Ebay for $150-200 and using the funds to buy something like this.
Removed from a 1989 Mustang GT. Was making a scratching noise when installed and bounced once going over 80mph. Will need rebuilt?.
www.ebay.com
That will bolt right into an 87-89 cluster without any modifications.
If you try to put a 90-93 speedo into a 87-89 cluster, you'll find the bottom of the speedometer is a different shape and don't really fit into the cluster cleanly. There will be a gap at the bottom. You can attempt to disassemble the 87-89 speedometer and the 90-93 speedometer and swap the guts and speedo face over, but i've found once you peel those guage faces off, they never stick right again and look like junk at night. The guage face doesn't fully cover the plastic clear frame either, so there will be a large gap at the bottom.
For the work involved to give a less than perfect result, just sell the cluster and buy the right unit