TH400 speedo plug?

[norbs]

I want to plug the hole for the speedo on my TH400, any suggestions? Does anyone make a special plug for this?

 

[jakeshoe]

An expansion plug (freeze plug) is what GM used on the 4x4 models when the speedo was in the t-case.
I just did one of these and I believe it was a 1 15/16 expansion plug.

 

[V6RACER]

Yes, 1-15/16 expansion plug. I picked one up from NAPA.

 

[norbs]

Thanks, ill try a local parts place.:redface:

 

[ttypewhite]

Hey Norbs, do you have it all installed now? Show some pics of the T400 and the GV unit. How much weight did this add to your car? That small pic in your sig is hard to see.

 

[norbs]

I have a few bolts just holding the tranny in and GV for now. I have to pull it out again since its hitting the floor a bit. The calculated weight difference over the 2004r is 70lbs, since the switch pitch converter is heavy also. I will get some more pics soon.

 

[ttypewhite]

Good stuff, I hope it works out well for you. Let me know how it all works once she is up and running. Did you buy that GV new or used?