Yeah, I know... Speedo pinion #s AGAIN!!??

Posted By: Kern Dog

Yeah, I know... Speedo pinion #s AGAIN!!?? - 04/12/11 12:41 AM

The page in the Moparts archives do not show the 3.23 ratio, only 3.21. I am trying to determine the correct pinion for my car. Who has the info?
28" tire, 3.23 gear. I HAVE a 30 and a 33. After that its 25/27/29/34/37. I COULD slip in the 30 and be pretty close, but with an 800 mile round trip coming up, an accurate speedo/odometer would be nice. The COPS might appreciate it as well. Thanks guys!

Posted By: Mopar_Country

Re: Yeah, I know... Speedo pinion #s AGAIN!!?? - 04/12/11 01:05 AM

Should be 31 green.

Attached picture 6580517-speedo001(Medium).jpg

Posted By: RapidRobert

Re: Yeah, I know... Speedo pinion #s AGAIN!!?? - 04/12/11 01:16 AM

I put a piece of stock across the top of a rear tire and measure my actual dia to the pavement and w the ratio known, picked the pinion from the MP archives chart and it made my odo and speedo dead on. Checked the odo on the interstate mile markers and the speedo at a digital road side sign. The odo can be spot on w the correct pinion and the speedo still off if the magnetic speedo gismo is not calibrated right & luckily mine was (& most are)