Re: 62-65 speedo gears
[Re: viperakron]
#2597282
12/26/18 07:47 PM
12/26/18 07:47 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I would try eBay & you might google speedometer shops & put an ad in here & on FABO
live every 24 hour block of time like it's your last day on earth
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Re: 62-65 speedo gears
[Re: lewtot184]
#2597305
12/26/18 09:00 PM
12/26/18 09:00 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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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.
live every 24 hour block of time like it's your last day on earth
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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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Joined: Jan 2003
Posts: 21,065 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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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
Chrysler Firepower
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Re: 62-65 speedo gears
[Re: viperakron]
#2597366
12/27/18 12:04 AM
12/27/18 12:04 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
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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?
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.
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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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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Circle Track
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Lincoln Nebraska
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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. Lewt good info (I gotta a couple of early ones up coming)
live every 24 hour block of time like it's your last day on earth
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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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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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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.
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Re: 62-65 speedo gears
[Re: lewtot184]
#2597535
12/27/18 01:06 PM
12/27/18 01:06 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
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Posts: 14,889
up yours
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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. Don;t think that phone number is accurate anymore. http://www.usande.com/contact.htmlI think they may have been the one I dealt with way back when.
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.
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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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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
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Too Many Posts
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Posts: 25,748
Rio Linda, CA
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No, they're thread-on adapters, the '62-'65 uses this type.
The INTERNET, the MISinformation superhighway
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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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Joined: Jul 2003
Posts: 63 Silver Springs, Florida
Charrlie_S
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member
Joined: Jul 2003
Posts: 63
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.
Charrlie_S 66 Cuda 170 nitrous 66 Valiant 225 nitrous 65 Valiant 170 turbo 64 Valiant driver 64 Valiant roller
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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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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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Posts: 14,889
up yours
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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.
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Re: 62-65 speedo gears
[Re: Charrlie_S]
#2598043
12/28/18 04:36 PM
12/28/18 04:36 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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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. Yes, they make inline reducers that have threaded input/output or crimp in the cable. Speedo shops use them to get the cable speed dead on when there's no room at the trans output. Here's a nifty idea to keep the stock speedo and drive it with a GPS input. https://www.speedhut.com/ecommerce/product/2585/SPEEDBOX™-GPS-VSS-to-Mechanical-Drive-Speed-Converter
The INTERNET, the MISinformation superhighway
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Re: 62-65 speedo gears
[Re: Bull1tt]
#2598187
12/28/18 11:28 PM
12/28/18 11:28 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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bought used/never tried it. Stewart Warner made in US of A.
live every 24 hour block of time like it's your last day on earth
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Re: 62-65 speedo gears
[Re: RapidRobert]
#2598191
12/28/18 11:32 PM
12/28/18 11:32 PM
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Joined: May 2012
Posts: 1,820 South Bend
John Brown
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top fuel
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South Bend
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bought used/never tried it. Stewart Warner made in US of A. What ratio is that one? They made hundreds of different ones.
July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.
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Re: 62-65 speedo gears
[Re: RapidRobert]
#2603434
01/08/19 02:42 PM
01/08/19 02:42 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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I opened it up & the teeth count is (in to out/upper left to lower right): 11 teeth/18 teeth on the middle idler/14 teeth. EDIT I ain't sure if this (procedure) is right but 11/18 is .61111 and 18/14 is 1.28511 and 1.28511-.61111 = .6746 (underdriven???). MORE EDIT With more work if my math is right it will reduce the tooth count 27.27%, speeding up the speedo that % amount
Last edited by RapidRobert; 01/09/19 01:11 AM. Reason: missed something critical
live every 24 hour block of time like it's your last day on earth
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