neutral safety switch

[willy c]

Is there a trick to installing a new neutral safety switch in the 904 transmission? I have had 2 start leaking around the pins and no continuity between the outside pins for the backup lights. Am I missing something?
Thanks, Willy

[Nacho-RT74]

jack up the car high enough to save from oil leak when removing the NSS. Get a pan preparied just in case some oil comes out

[willy c]

after checking in my parts book I have a 727A transmission. but my question is about the leakage around the pins and no continuity for the backup lights.

[randy73]

Where is it leaking, from around the threads or around the pins?

If around the threads, use plumbers tape.

[RECHRGD]

A few years back I bought a new 727 from Cope Racing.  It came with a nice new NSS that leaked.  I called John Cope about it.  He said that he was starting to get the same complaint from other customers.  It seems that he had gotten a batch of bad ones.  I just installed my old one and the problem was gone......

[ODZKing]

Just went through this at the end of last summer with my 73. There is a batch of bad ones out there. You just have to keep trying until you get one that doesn't leak.

[willy c]

that is good to know I thought there was some trick to putting them in.

[Captain D]

Late in the game posting this - same thing happened to me. All repro switches leaked on mine til'I bought a NOS switch... hasn't leaked since & that was 3 years ago. Crazy...

[Swampwing2]

I had a new one leak pretty badly on me, but it was actually leaking around the O ring seal. The new one had a metal collar that was between the O ring and the actual switch so there was not an actual rubber seat against the switch.

[tsmithae]

I just fixed this on my Charger . Avoid all but BWD. BWD NSS was the one that fixed it for me, the rest leak.