Author Topic: 71 Cuda Speedometer.  (Read 654 times)

Offline woody9512

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  • 71 Billboard Cuda, Pistol Grip 4-speed.
71 Cuda Speedometer.
« on: August 27, 2018 - 08:55:31 am »
I have a 71 Cuda 340 4-speed and am going to get some old wiring replaced and rally gauges redone in process very soon. I think my speedometer consistently reads a bit faster than the car is actually going. Wondering about maybe getting a new speedometer cable and replacing that while the work is being done. Just wondering about anything else that could cause the speed reading to be higher. Is there any type of an attachment other than the cable that I should be replacing. Car has 15 inch wheels on the standard type rally rims.
Thanks
Tim




Offline 70chall440

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Re: 71 Cuda Speedometer.
« Reply #1 on: August 27, 2018 - 11:35:43 am »
You need to change the speedometer gear in the trans.

Type this into google mopar speedometer gear chart, many will pop up.

You need to know your rearend gears and your tire height.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline woody9512

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  • 71 Billboard Cuda, Pistol Grip 4-speed.
Re: 71 Cuda Speedometer.
« Reply #2 on: August 27, 2018 - 12:22:17 pm »
Thanks for the info. My cuda has 355 gears and my rear tire height is 27 inches. If I read the chart correctly I need a gear with 34 teeth? Does anyone know best place to order this speedometer gear from. Thanks Tim

Offline 70chall440

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Re: 71 Cuda Speedometer.
« Reply #3 on: August 27, 2018 - 02:24:37 pm »
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline woody9512

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  • Posts: 261
  • 71 Billboard Cuda, Pistol Grip 4-speed.
Re: 71 Cuda Speedometer.
« Reply #4 on: August 28, 2018 - 08:20:07 am »
Thanks.
Will check that site out...
Tim

Offline 70chall440

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Re: 71 Cuda Speedometer.
« Reply #5 on: August 28, 2018 - 10:32:00 am »
There are a variety of sites that offer them.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)