Speedo cable opening in D20

[AZ73]

Any ideas on how to seal this up if you're not using a speedo cable?

 

[Phil76]

Maybe something like this: https://www.summitracing.com/parts/...PEtDKD4ybFtJJmb6inlmmfqg-GibR7oEaAhNcEALw_wcB

 

[bmc69]

I find a plastic caplug that fits in the hole, insert with some RTV, and retain it with a bolt and flat washer in the cable retainer hole.

 

[DJs74]

Both suggestions given sound good - you could also use an expansion plug. Basically a rubber plug with a hex head nut on top... as you tighten the nut, the mechanism inside squeezes the rubber forcing it outward toward the hole bore. They come in a variety of sizes. Watch the material though, you'll want an oil resistant rubber like NBR (AKA Nitrile or Buna N)


DJs74

 

[B RON CO]

Hi, I would measure the hole with my digital caliper and see if a freeze out plug is available. I use Indian Head gasket shellac on my freeze out plugs. Good luck

 

[Rustytruck]

https://www.mcmaster.com/#freeze-plugs/=1a631st

https://www.dormanproducts.com/c-250-cup-type-expansion-plugs.aspx

 

[Broncobowsher]

Junkyard factory ford speedometer plug. Used when speedometers were going to all electronic but before the speedo cable hole was universally deleted. I think I got one off a 2WD late 90's Explorer. Plastic plug with an O-ring. Just bolts in, completely reversible with no side effects later if you ever need a speed sensor again.

 

[AZ73]

Thanks All!