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BRINGING IT ALL TOGETHER.... A's, G's & E's


5 posters

speedometer dilemma

michael.
michael.


Number of posts : 14
Location : Findlay, Ohio
Age : 68
Registration date : 2018-12-28

speedometer dilemma Empty speedometer dilemma

Post by michael. Sat Oct 19, 2019 7:31 am

I have a '69 A100 6 cyl. 3 speed, stock 3.91 gears and a 28" tire. I am in the process of changing the rear from 3.91 to 3.23. Using this conversion table http://www.mymopar.com/speedometer.htm it appears I need a 31 tooth gear. HOWEVER, using the same table, it seems I should have a 37 tooth gear in there now assuming my speedometer is accurate, and according to my GPS, it's pretty close.

The gear I removed only has 15 teeth, factory part# 2235429 15. Not even listed on the chart.

speedometer dilemma Speedo11


What am I missing?
dix
dix
Moderator 1st Class
Moderator 1st Class


Number of posts : 8562
Location : pittsburgh pa
Age : 65
Registration date : 2008-05-29

speedometer dilemma Empty Re: speedometer dilemma

Post by dix Sat Oct 19, 2019 8:21 am

i think the chart you are using is for a automatic ,
if you are running a 391 gear that would be for a 3 speed ,(manual)
if you are moving to a 323 rear gear that is for a automatic


_________________
still vannin since 1974
sweetvan
sweetvan


Number of posts : 231
Location : Ventura, CA, 93003
Registration date : 2013-12-16

speedometer dilemma Empty Re: speedometer dilemma

Post by sweetvan Sat Oct 19, 2019 9:17 am

Is yours a stick?


Last edited by sweetvan on Sun Oct 20, 2019 8:33 am; edited 1 time in total
michael.
michael.


Number of posts : 14
Location : Findlay, Ohio
Age : 68
Registration date : 2018-12-28

speedometer dilemma Empty Re: speedometer dilemma

Post by michael. Sat Oct 19, 2019 10:03 am

Yes, it is a stick. I thought the chart was the same for auto or stick. The picture I posted IS the driven gear, no?  I haven't tried anything yet. Didn't want to spend $30 on the wrong gear. So if I'm reading the chart wrong, and it's not 31 tooth, what gear do I need for 3.23 rear, 28"tire, standard shift?
dix
dix
Moderator 1st Class
Moderator 1st Class


Number of posts : 8562
Location : pittsburgh pa
Age : 65
Registration date : 2008-05-29

speedometer dilemma Empty Re: speedometer dilemma

Post by dix Sat Oct 19, 2019 1:54 pm

a automatic odometer gear is plastic, , red ,yellow, green and so on,
what chart are you working from, ??
if you go to a old school tranny shop as i did they had a bucket of gears
gave me what i needed for free


_________________
still vannin since 1974
michael.
michael.


Number of posts : 14
Location : Findlay, Ohio
Age : 68
Registration date : 2018-12-28

speedometer dilemma Empty Re: speedometer dilemma

Post by michael. Sat Oct 19, 2019 4:13 pm

Yeah, it appears the chart I was looking at was for automatics. The gear I took out was 15 teeth steel. looks like I need a steel gear with about 13 teeth. If anybody has one, let me know. till then I'll keep an eye on ebay.

Thanks, Mike
dix
dix
Moderator 1st Class
Moderator 1st Class


Number of posts : 8562
Location : pittsburgh pa
Age : 65
Registration date : 2008-05-29

speedometer dilemma Empty Re: speedometer dilemma

Post by dix Sun Oct 20, 2019 4:38 am

just throwing darts but my guess is any mopar with a 273 / 318 v8
with a 3 speed from 60,s or 70's would get you closer to your goal, i'd
sugest a old private owned tranny shop


_________________
still vannin since 1974
michael.
michael.


Number of posts : 14
Location : Findlay, Ohio
Age : 68
Registration date : 2018-12-28

speedometer dilemma Empty Re: speedometer dilemma

Post by michael. Sun Oct 20, 2019 5:32 am

I'll try, but in the meantime I posted in parts wanted. Might have better luck there,

Thanks, Mike
dix
dix
Moderator 1st Class
Moderator 1st Class


Number of posts : 8562
Location : pittsburgh pa
Age : 65
Registration date : 2008-05-29

speedometer dilemma Empty Re: speedometer dilemma

Post by dix Sun Oct 20, 2019 8:20 am

i will send you a private message


_________________
still vannin since 1974
69
69


Number of posts : 403
Location : Germany, Nds
Registration date : 2016-10-18

speedometer dilemma Empty Re: speedometer dilemma

Post by 69 Sun Oct 20, 2019 11:01 am

Are you sure you have a wheel height of 28"? IIRC my 79' B-Van based Camper with 16.5" rims and 8.00x16.5 tires has that height...?
michael.
michael.


Number of posts : 14
Location : Findlay, Ohio
Age : 68
Registration date : 2018-12-28

speedometer dilemma Empty Re: speedometer dilemma

Post by michael. Sun Oct 20, 2019 11:45 am

Yup 235/R7015
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Sparky747


Number of posts : 4
Location : Wisconsin
Registration date : 2010-07-04

speedometer dilemma Empty Re: speedometer dilemma

Post by Sparky747 Thu Oct 31, 2019 4:51 pm

Hi;

If all else fails you might consider GPS app for smart phone, if you need to stay within speed limit parameters.


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