Sean D 31 Report post Posted June 2, 2016 Hello Everyone, I have a 69 Mach 1 that currently has a 70 c6 transmission. The car does not have a neutral safety switch installed and the wiring at the firewall is crossed to let the engine start. okay, yes, but I can start the engine in any gear...so not good! And also have no back up lights. Therefore I would like to install the neutral safety switch. So know I need to decide with one to purchase. As you can see from the table and picture, the 69 and 70 are different, where the 70 has taller standoffs to clear the locking column lever. But my 69 does not have a locking column. Does this mean I should use the 68-69 part? If so this would be great since companies like Scott Drake are making them, but no one makes the 70 part, which mean NOS and big money. C7ZZ-B C6 '68-'69 Transmission One Quad Plug D0ZZ-B C6 '70-'72 before 12/1/71 Transmission One Quad Plug with taller standoffs to clear locking column lever. Quote Share this post Link to post Share on other sites
LindenBruce 27 Report post Posted June 3, 2016 I would use the one which plugs into your existing harness AND fits your transmission. I think the 69 and 70 harness plugs for this switch are the same, but don't quote me on that as I don't have a 70 diagram in front of me. Bruce Quote Share this post Link to post Share on other sites
Sean D 31 Report post Posted June 3, 2016 I believe the harness plugs are the same between the two years, but the base that attaches to the transmission is different. Anyone out there have a 69 stang with 70 c6 transmission? Which one do you have? Quote Share this post Link to post Share on other sites
jjstang 51 Report post Posted June 4, 2016 I didn't know Mach1s ever came with column shifters. Both of the switches pictured above are for column shift cars. The floor shifters are completely different. Quote Share this post Link to post Share on other sites
det0326 179 Report post Posted June 4, 2016 I with jjstang My neutral/reverse switch is in the floor shifter. Dave 1 mwye0627 reacted to this Quote Share this post Link to post Share on other sites
Rsmach1 71 Report post Posted June 5, 2016 The shifter mounted switch only came with the FMX, AFAIK. Quote Share this post Link to post Share on other sites
Rsmach1 71 Report post Posted June 5, 2016 I would probably go with the 70 switch as that's the year trans you're using. Quote Share this post Link to post Share on other sites
Sean D 31 Report post Posted June 5, 2016 Here is an article about neutral safety switches: http://www.mustangandfords.com/how-to/engine/1308-how-to-troubleshoot-neutral-safety-switches/ I was not saying that mustangs had column shifters, but in 70 they did have column levers for tilt or ignition switch that is in the column. Guess I will order both and see which one works. Thanks all! Quote Share this post Link to post Share on other sites
Sean D 31 Report post Posted June 5, 2016 The shifter mounted switch only came with the FMX, AFAIK. Rsmach1 the switch is in the floor shifter in mustangs with an FMX, but not for c4 or c6s. Quote Share this post Link to post Share on other sites
danno 128 Report post Posted June 9, 2016 I have one of these on my 69 right under the PRND21 indicator. I use it for my tilt/breakaway steering wheel, so it only breaks away if in park or neutral. I will need to look at it and see what it is, if that helps. Danno Quote Share this post Link to post Share on other sites
Rsmach1 71 Report post Posted June 10, 2016 Rsmach1 the switch is in the floor shifter in mustangs with an FMX, but not for c4 or c6s. That's what I said lol. 1 magician reacted to this Quote Share this post Link to post Share on other sites
afret 37 Report post Posted June 12, 2016 My '69 came with a C6 but I switched to a C4. I just got the neutral switch for the FMX trans and installed it in my shifter just like for an FMX. The connectors were the same so it was an easy plug in. BTW, where did these photos below come from? How do I get rid of them? Quote Share this post Link to post Share on other sites
