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62-65 speedo gears #2597234
12/26/18 05:33 PM
12/26/18 05:33 PM
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Ohio
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viperakron Offline OP
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Have a push button TF and need a Green 20 tooth speedo gear for a 3.73 rear. Has a brown gear in there now from a desert gear. Anyone repop or know of a source. And other cost effective options to get speedo close for road trips.

Re: 62-65 speedo gears [Re: viperakron] #2597282
12/26/18 07:47 PM
12/26/18 07:47 PM
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Lincoln Nebraska
RapidRobert Offline
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I would try eBay & you might google speedometer shops & put an ad in here & on FABO


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Re: 62-65 speedo gears [Re: viperakron] #2597292
12/26/18 08:23 PM
12/26/18 08:23 PM
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Andrewh Offline
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also early b body site used to have a classified that had some advertised..

http://www.1962to1965mopar.ornocar.com/welcome.html

Re: 62-65 speedo gears [Re: viperakron] #2597294
12/26/18 08:26 PM
12/26/18 08:26 PM
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New York
rarefish Offline
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Brewer's is another source, but the prices are getting up there and inventory is limited.
I can tell you that the 20 and 21 tooth gears are like hen's teeth. I have been on the watch for one for years.
The 19 tooth gear in my 64 Belvedere is green in color. I think the 20 tooth gear is a different color.

Re: 62-65 speedo gears [Re: viperakron] #2597301
12/26/18 08:55 PM
12/26/18 08:55 PM
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lewtot184 Offline
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a 20 tooth with a 3.73 rear by itself won't be accurate. any axle ratio lower (higher numerically) than a 3.55 will require a ratio reducer. there was never any combo's made that was perfectly accurate. the easiest way is a 17 tooth with a .80 ratio reducer. 19 and 20 tooth were used mostly in 3.23 gear cars. 21 tooth was for 3.55 rear and 3.91 gear cars used a 21 tooth with a .80 reducer. I use an 18 tooth with a .90 reducer for a 3.23 gear and 28" tall tires. speedo is close but not perfect.

Re: 62-65 speedo gears [Re: lewtot184] #2597305
12/26/18 09:00 PM
12/26/18 09:00 PM
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Lincoln Nebraska
RapidRobert Offline
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^^^ That's what I was thinking, a ratio reducer, I have one but no idea how well it works but it seems simple enough. I ain't opened it up but I think just 2 gears at a right angle in a box.


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Re: 62-65 speedo gears [Re: viperakron] #2597317
12/26/18 10:08 PM
12/26/18 10:08 PM
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Niles , Ohio
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therocks Offline
oh wait.but hey.lets see.oh yeah.
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I run the OE 3.23 gear gear in my 65.Now has 3.91s i know that speedo is about 20% fast.Just compensate for it.It was way off when i ran 4.88s on the street.Also the gears are different than later models which makes them even harder to find.Rocky


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Re: 62-65 speedo gears [Re: viperakron] #2597329
12/26/18 10:42 PM
12/26/18 10:42 PM
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lewtot184 Offline
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it's difficult to get the speedo's exact. there were only 6 different pinions made and there is a 5% difference between them. chances are whatever you do you'll be a couple of percent off. a ratio reducer will be necessary to get close.

Re: 62-65 speedo gears [Re: viperakron] #2597366
12/27/18 12:04 AM
12/27/18 12:04 AM
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Problem is where do you get a ratio reducer. I used to know a speedo shop that I got new cables for my 64 300 from that could make them, but that was in 1988. Now days, who knows?


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Re: 62-65 speedo gears [Re: lewtot184] #2597367
12/27/18 12:06 AM
12/27/18 12:06 AM
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Lincoln Nebraska
RapidRobert Offline
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Originally Posted By lewtot184
a 20 tooth with a 3.73 rear by itself won't be accurate. any axle ratio lower (higher numerically) than a 3.55 will require a ratio reducer. there was never any combo's made that was perfectly accurate. the easiest way is a 17 tooth with a .80 ratio reducer. 19 and 20 tooth were used mostly in 3.23 gear cars. 21 tooth was for 3.55 rear and 3.91 gear cars used a 21 tooth with a .80 reducer. I use an 18 tooth with a .90 reducer for a 3.23 gear and 28" tall tires. speedo is close but not perfect.
Lewt good info (I gotta a couple of early ones up coming)

SAM_0857-052.JPG

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Re: 62-65 speedo gears [Re: viperakron] #2597476
12/27/18 09:52 AM
12/27/18 09:52 AM
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lewtot184 Offline
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I got my reducer from Imperial Services years ago, but I think they're out of business now. the Good Guys Gazette had a speedo service ad for odd stuff but I haven't gotten the gazette in a few years. I was told that they were used on Fargo truck stuff. maybe goggle them? they're the only solution.



I found this in an older gazette. United Speedometer Service, Inc. 951-684-0292. give them a call. a stock cable won't work with the reducer, but a 1966 cable will.

Last edited by lewtot184; 12/27/18 10:26 AM.
Re: 62-65 speedo gears [Re: viperakron] #2597531
12/27/18 12:53 PM
12/27/18 12:53 PM
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New York
rarefish Offline
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Imperial Services still has a web site....

http://www.imperialservices.net/

Re: 62-65 speedo gears [Re: lewtot184] #2597535
12/27/18 01:06 PM
12/27/18 01:06 PM
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Originally Posted By lewtot184
I got my reducer from Imperial Services years ago, but I think they're out of business now. the Good Guys Gazette had a speedo service ad for odd stuff but I haven't gotten the gazette in a few years. I was told that they were used on Fargo truck stuff. maybe goggle them? they're the only solution.



I found this in an older gazette. United Speedometer Service, Inc. 951-684-0292. give them a call. a stock cable won't work with the reducer, but a 1966 cable will.


Don;t think that phone number is accurate anymore.

http://www.usande.com/contact.html

I think they may have been the one I dealt with way back when.


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Re: 62-65 speedo gears [Re: rarefish] #2597620
12/27/18 03:20 PM
12/27/18 03:20 PM
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north of coder
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Originally Posted By rarefish
Imperial Services still has a web site....

http://www.imperialservices.net/


yes, but i don't have much faith in those guys. way too many horror stories about those "services" floating around to make me uncomfortable giving them any money for the items they have, or at least advertised.
there are things i am interested in, but i won't take a chance.
beer

Re: 62-65 speedo gears [Re: viperakron] #2597672
12/27/18 05:28 PM
12/27/18 05:28 PM
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Avondale AZ
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Aaron

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Re: 62-65 speedo gears [Re: Prodart440] #2597693
12/27/18 07:13 PM
12/27/18 07:13 PM
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Rio Linda, CA
John_Kunkel Offline
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No, they're thread-on adapters, the '62-'65 uses this type.

Speedoends.jpg

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Re: 62-65 speedo gears [Re: viperakron] #2597764
12/27/18 09:53 PM
12/27/18 09:53 PM
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Silver Springs, Florida
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I've never looked that close to see if it could be done, but.
Would it be possible to use the stock speedo trans gear/cable assy, and put the ratio adapter on the other end of the cable, then have a short cable to connect the ratio adapter to the speedo head? Similar to the way mopar did the cruise control.


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Re: 62-65 speedo gears [Re: viperakron] #2597775
12/27/18 10:24 PM
12/27/18 10:24 PM
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Sure, it could be done. Need two custom cables though that's the easy part.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: 62-65 speedo gears [Re: viperakron] #2597864
12/28/18 02:37 AM
12/28/18 02:37 AM
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Pgh, PA
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Bull1tt Offline
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DO NOT USE Imperial Services! Sold to Steve Chattel who is an outright thief! Sent $415 for a ratio adapter that never got sent. He will just quit answering your calls after a while. Turned him in to FBI fraud division, THEN he called me. But NEVER got the part. Hard to deal with thieves out of state, but god help me the next time I go to Michigan....

Re: 62-65 speedo gears [Re: viperakron] #2597865
12/28/18 02:44 AM
12/28/18 02:44 AM
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Pgh, PA
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What you need to do is go GPS signal to mechanical speedometer. Then gear ratio and tire size becomes irrelevant. Change either anytime!


GPS link

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