24 Tooth Speedo Pinion Req'd

Posted By: Simonic

24 Tooth Speedo Pinion Req'd - 03/12/15 09:42 AM

My speedo reads slow.After checking the chart in the tech area of this forum I realize I need a 24 tooth pinion.
I've looked at the normal parts outlets and nobody seems to supply one that small.
Can any of you suggest a supplier for this part please?

Posted By: cdstl

Re: 24 Tooth Speedo Pinion Req'd - 03/12/15 01:58 PM

A&A Transmission in Indianapolis shows a 25 tooth as their smallest. You might have to settle for that.

Posted By: mopars4ever

Re: 24 Tooth Speedo Pinion Req'd - 03/12/15 03:53 PM

mopar part old number 2538924 and new number 3410024
the 24 tooth gear would take a special adapter too http://www.brewersperformance.com/products.asp?cat=61 http://www.brewersperformance.com/products.asp?cat=277

Posted By: 64dodge572

Re: 24 Tooth Speedo Pinion Req'd - 03/12/15 04:31 PM

I do not currently have a 24T in stock, you need to call A&A. He has more parts than on his website.

Posted By: RapidRobert

Re: 24 Tooth Speedo Pinion Req'd - 03/12/15 04:35 PM

If you ain't already I would suggest "rollout" to confirm the exact tooth pinion you need (especially since you need a rare size). There also is a mini reduction gearbox the size of your fist that goes inline on the speedo cable to fine tune adjust the speed also. I have one but no pic at the moment.

Posted By: Simonic

Re: 24 Tooth Speedo Pinion Req'd - 03/12/15 06:38 PM

Thank You for all the info gentlemen.
I'll get started on this over the weekend

Posted By: 63stabamatic

Re: 24 Tooth Speedo Pinion Req'd - 03/14/15 12:42 PM

FWIW, I could never find a gear for my pushbutton 65 trans and the adapter is very expensive. I went with a heads up display GPS speedometer Gtop HG100. There are a lot of GPS speedometers around to choose from. What's cool is you can change tires, gears, whatever, it doesn't care.

Posted By: RP's R/T's

Re: 24 Tooth Speedo Pinion Req'd - 03/14/15 02:31 PM

Any recommendations on the best gear tooth calculator?
I am looking at the same situation but want to make sure the speedo gear is as correct as possible. These things have gotten expensive. I remember when they were 1/2 the prices they are today.

Posted By: Stanton

Re: 24 Tooth Speedo Pinion Req'd - 03/14/15 05:40 PM

I remember when bread was 10 cents a loaf !

Posted By: therocks

Re: 24 Tooth Speedo Pinion Req'd - 03/14/15 05:51 PM

63 any gears for 65 back trannys are pricey.They are different than 66 up.Its even hard to find some.I know my 65s speedo is off but I know by how much so I just ajust the speed.Rocky

Posted By: BDW

Re: 24 Tooth Speedo Pinion Req'd - 03/14/15 09:28 PM

Quote:

FWIW, I could never find a gear for my pushbutton 65 trans and the adapter is very expensive. I went with a heads up display GPS speedometer Gtop HG100. There are a lot of GPS speedometers around to choose from. What's cool is you can change tires, gears, whatever, it doesn't care.

Got any more details? What's involved, cost, reception?

Posted By: John_Kunkel

Re: 24 Tooth Speedo Pinion Req'd - 03/14/15 10:48 PM

http://www.pocketgpsworld.com/bluetooth_hud_gps_review_globaltop_hg-100.php

Posted By: Sxrxrnr

Re: 24 Tooth Speedo Pinion Req'd - 03/15/15 03:47 AM

Speedometer - Free - Speed Limit Alert with Map, HUD and GPS Black Box Recorder by Stanislav Dvoychenko
https://appsto.re/us/NmhqH.i

Great product. Free for basic, couple of bucks for upgrade. Perfect for checking out accuracy of speedo and odometer.

The more teeth you have on your 'driven' gear on speedo cable, the slower your speedo reads compared to your actual true speed. The drive gear is the one on trans tail shaft. Contrary to op's thoughts, I believe you need a driven gear with fewer teeth, not more.

When does the ground war begin?

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