Author Topic: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger  (Read 10239 times)

Offline chaps70rt

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4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« on: October 04, 2010 - 11:55:13 PM »
Hi guys .... I am doing a conversion from Automatic to 4-Speed.  I need to know where to drill out the hole for the reverse light in the firewall to the dash.   

I am also interested to know where the shaker cable should come through also.   Any pics or measurements would be much appreciated.

Thanks .... CHAPS
White 1970 Challenger R/T
440 - 4BBL - Shaker
Daily Driver - 2014 Dodge RAM 1500
Stouffville, Ontario Canada




Offline Chryco Psycho

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #1 on: October 05, 2010 - 02:35:18 AM »
the reverse light goes through above the gas pedal but my pix or on the other computor

Challenger - You`ll wish You Hadn`t

Offline BB 70 Challenger

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #2 on: October 05, 2010 - 03:22:37 AM »
 :woohoo:

Found this picture in the ARCHIVES :


Offline chaps70rt

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Re: 4-Speed "and Shaker cable" thru Firewall. 70 Challenger
« Reply #3 on: October 05, 2010 - 10:26:39 PM »
Ah Yes .... I do remember this picture now.    That is a big help ....  thanks for the quick responses.

What about the shaker cable??

 :cheers:  ...... Gary
White 1970 Challenger R/T
440 - 4BBL - Shaker
Daily Driver - 2014 Dodge RAM 1500
Stouffville, Ontario Canada

Offline Topcat

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #4 on: October 05, 2010 - 11:05:41 PM »
Shaker cable hole for 70-71. 71 Hemi shared 2 cables from the same grommet.







Mike, Fremont, CA.


Offline swede-cuda

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #5 on: October 09, 2010 - 08:21:15 AM »
hm.last time i saw that picture the cuda road-lamps was at where the cuda clutch safety switch is at now?doesnt the 2 e-bodies use the same hole for clutch safety switch grommet?

Offline chaps70rt

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #6 on: October 09, 2010 - 08:58:21 AM »
Hey Topcat ..... thanks for the pics ..... that is a huge help.   Only question is ...... what is the other cable that comes through with the shaker cable?

I have A/C in my car, do you happen to know where the temperature adjustment cable comes through the firewall?  It is not on the orange labelled picture.   I suppose I could use one of the other unused item hoes, but thought I should check with others that may have already gone down this path.

Thanks again ..... Gary
White 1970 Challenger R/T
440 - 4BBL - Shaker
Daily Driver - 2014 Dodge RAM 1500
Stouffville, Ontario Canada

Offline Topcat

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #7 on: October 09, 2010 - 12:47:44 PM »
Hey Topcat ..... thanks for the pics ..... that is a huge help.   Only question is ...... what is the other cable that comes through with the shaker cable?

I have A/C in my car, do you happen to know where the temperature adjustment cable comes through the firewall?  It is not on the orange labelled picture.   I suppose I could use one of the other unused item hoes, but thought I should check with others that may have already gone down this path.

Thanks again ..... Gary


In 71' only the Hemi had the 2 cables coming out of the same grommet. One cable operated the bellcrank and the other one operated the manual choke. Manual choke was a 1 year only feature just on the Hemi's.

The temp cable comes out on the D/S of the firewall. A clip holds it to the cowl.


Mike, Fremont, CA.


Offline Topcat

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #8 on: October 09, 2010 - 12:56:55 PM »
hm.last time i saw that picture the cuda road-lamps was at where the cuda clutch safety switch is at now?doesnt the 2 e-bodies use the same hole for clutch safety switch grommet?


Pic of firewall.


Mike, Fremont, CA.


Offline chaps70rt

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #9 on: October 10, 2010 - 07:49:31 AM »
Thanks again Topcat.    I have my cable running along the  under side of the cowl.   I was not aware that there was a clip needed in the area?   Is it a common one .... or something unique?   Perhaps a picture?   The temperature cable is not listed in the orange firewall pic.   Is there a specific grommet I should take it through?

I am aware that since I have A/C and a shaker, that things will not be to original specs.   For example, the cable for the shaker will not run out of the factory set up as they didn't have A/C and shaker setups (factory).   So, I have no choice but to re-route the shaker cable somewhere close.

Any thoughts or ideas? 
White 1970 Challenger R/T
440 - 4BBL - Shaker
Daily Driver - 2014 Dodge RAM 1500
Stouffville, Ontario Canada

Offline Topcat

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #10 on: November 22, 2010 - 05:50:53 AM »
Thanks again Topcat.    I have my cable running along the  under side of the cowl.   I was not aware that there was a clip needed in the area?   Is it a common one .... or something unique?   Perhaps a picture?   The temperature cable is not listed in the orange firewall pic.   Is there a specific grommet I should take it through?

I am aware that since I have A/C and a shaker, that things will not be to original specs.   For example, the cable for the shaker will not run out of the factory set up as they didn't have A/C and shaker setups (factory).   So, I have no choice but to re-route the shaker cable somewhere close.

Any thoughts or ideas?

Original Heater control valves had 2 clips. One was roundish shaped and the other that holds it on top, the cable fitted into it. I don't know if they're being re made or not. Try R/T Specialties? If not, later year Mopars up to 78 will have them if the car had A/C. i.e: for sure 76 Cordoba had em.

Shaker cable hole you can put somewhere else. But keep original or near the same place it originally was like is what I would do.
Mike, Fremont, CA.


Offline 344speed

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #11 on: November 29, 2010 - 12:18:36 PM »
Unless you have the 1 in. grommet in your hand do not drill out a 1 in. hole. It seems they repop the smaller one for the 1/2 in hole and not the larger one. I have been searching everywhere and cannot find one. Even at the bone yards and I have a thread here in parts wanted.
72 Ralley 344SPD

Offline chaps70rt

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #12 on: December 04, 2010 - 04:07:24 PM »
Thanks ... I will keep that in mind.   I need to go through my bag of body plugs.   I believe that they included a shaker grommet with the kit??

CHAPS
White 1970 Challenger R/T
440 - 4BBL - Shaker
Daily Driver - 2014 Dodge RAM 1500
Stouffville, Ontario Canada

Offline GranCuda1970

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #13 on: May 16, 2012 - 12:34:14 PM »
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Offline 7071 challenger

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Re: 4-Speed wiring through Firewall for Reverse Light. 70 Challenger
« Reply #14 on: May 17, 2012 - 06:07:29 AM »
Hi guys .... I am doing a conversion from Automatic to 4-Speed.  I need to know where to drill out the hole for the reverse light in the firewall to the dash.   

I am also interested to know where the shaker cable should come through also.   Any pics or measurements would be much appreciated.

Thanks .... CHAPS
  I found that one on my computer. If it can help...

Robert