URGENT: Speedometer gear

Fopar

Member
Apr 1, 2007
178
0
16
San Marcos, CA
Hey guys just finished a gear swap from 2.73s to 3.73s, obviously the speedo is way off. Does anyone know what speedometer gear (VSS gear) count i'll need for the new combo? Tires are 245/45 R17s. I need to do this today and the ford dealership closes at 5 (less than 2 hours).
 
  • Sponsors (?)


I used the 23 tooth black speedo gear for my automatic. It still leaves the speedo reading ~6% too fast but that's acceptable. I also went from 2.73 to 3.73 and I also have the same 245/45R17 tires. The stock speedo gear on automatics has 18 teeth.
 
yes i'm aware of the drive gear issue but 6% will be close enough for now, when the trans needs a rebuild i'll swap it for the 7 tooth.

I found out today ford only makes up to a 21 tooth... sooo anyone know where I can get a 23 tooth in San Diego by friday? :(
 
In the back of my mind I seem to recall there was a 23 tooth speedo gear available from Jeep/Chrysler that should work. Then again I'm an old fart and my memory isn't as good as it used to be. Probably worth the cost of the call though.
 
In the back of my mind I seem to recall there was a 23 tooth speedo gear available from Jeep/Chrysler that should work. Then again I'm an old fart and my memory isn't as good as it used to be. Probably worth the cost of the call though.

yes if i recall the 50resto site tells you which gear you need. strangly tho for my cobra the speedo gear was already white...looked a lil old and yellowish thats all. but i also heard that that jeep/chrysler gear doesn't mesh well and eventually gets chewed up
 
Go to a Chrysler dealership. They will have it in stock; the white 23 tooth "mini" gear. It's not cheap ($25 I think) but it will do the job. Mine has lasted 20k miles so far just fine.
Scott