Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Speedometer Goes reverse direction HELP!

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Old Feb 14, 2007 | 07:59 PM
  #1  
joed's Avatar
joed
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Joined: Feb 2007
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Default Speedometer Goes reverse direction HELP!

Could anyone tell me how to fix this? My 65 Mustang 6 cly, 3spd manual transmission has a speedo problem. I just bought this car and the old owner was no help. The problem is the speedo goes toward the Omph instead of showing proper road speed. It actually goes in the reverse direction, and it is driving me crazy which is a short trip.
Thanks in advance for any help!
JOE
Old Feb 14, 2007 | 08:27 PM
  #2  
restomod66's Avatar
restomod66
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Joined: Aug 2006
Posts: 691
From: RI
Default RE: Speedometer Goes reverse direction HELP!

The gear has the wrong direction. Type 3 or 3a. I believe you need a type 3a on you car.
Old Feb 15, 2007 | 12:02 PM
  #3  
grruminator78's Avatar
grruminator78
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Joined: Jul 2006
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From: florida
Default RE: Speedometer Goes reverse direction HELP!

maybe your car is from oz
Old Feb 15, 2007 | 12:03 PM
  #4  
Wisconsin 5.0's Avatar
Wisconsin 5.0
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From:
Default RE: Speedometer Goes reverse direction HELP!

Just drive in reverse!
Old Feb 15, 2007 | 02:35 PM
  #5  
kalli's Avatar
kalli
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Joined: Oct 2006
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From: Cork, Ireland
Default RE: Speedometer Goes reverse direction HELP!

it would drive me nuts as well.
you'd be better off disconnecting it from the dash until fixed.


Old Feb 15, 2007 | 02:39 PM
  #6  
mustanglover66's Avatar
mustanglover66
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Joined: Mar 2006
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From: Concord, NC
Default RE: Speedometer Goes reverse direction HELP!

Someone probaly put a 4 speed gear on the cable. The 4 speed is the only trans. with the cable mounted on the passanger side of the car. get the correct cable gear and it should be fine. you will need to try to figure out how many teeth you need on the gear though. check NPD catolog they have the gears and the foumala to figure it out.
Old Feb 15, 2007 | 03:14 PM
  #7  
NorCalTroy's Avatar
NorCalTroy
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Joined: Sep 2006
Posts: 542
From: Sacramento, CA
Default RE: Speedometer Goes reverse direction HELP!

Just curious... does the odometer go backwards?

http://www.imdb.com/title/tt0091042/
Old Feb 15, 2007 | 04:23 PM
  #8  
kalli's Avatar
kalli
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Joined: Oct 2006
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From: Cork, Ireland
Default RE: Speedometer Goes reverse direction HELP!

no. they're usually made in such a way that odometer only goes forward.
Some even increase when you drive backwards.

So the only way on cheating with the odometer is to make it overturn (50000->99999->00000->25000 ...)
Old Feb 15, 2007 | 04:36 PM
  #9  
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NorCalTroy
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Joined: Sep 2006
Posts: 542
From: Sacramento, CA
Default RE: Speedometer Goes reverse direction HELP!

I was making a joke in reference to the movie Ferris Bueller's Day Off (the movie referenced in the link). I figured the odometer wouldn't go backwards, but couldn't miss the opportunity to bring up the movie. If you haven't seen it, it's a great movie from the 80's.
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