TH-350 Speedometer Plug Size

[HandOverFist]

I believe it is safe to assume if one is plugging the speedo drive hole the trans is seeing limited service on the street. That being said the impact of the deletion of said gear will have minimal impact on the lifespan of the transmission or any of it's components.

[Mark Yacavone]

Originally Posted by HandOverFist

I believe it is safe to assume if one is plugging the speedo drive hole the trans is seeing limited service on the street. That being said the impact of the deletion of said gear will have minimal impact on the lifespan of the transmission or any of it's components.

Agreed..Plus where does the fluid go to on a drag car? ;-)

[HandOverFist]

Originally Posted by Mark Yacavone

Agreed..Plus where does the fluid go to on a drag car? ;-)

On the track in some cases...

[Tom keedle]

Originally Posted by ss3011

The spinning governor provided the needed lube for the rear bushing. This was true for the 700-R4 also. When the transmissions were redesigned to the "e" versions, a hole was drilled that pee'd fluid back to lube the bushing.

governor is one thing but the speedo gear is another...aside from always leaking and the speedo gear wearing out at the seal,how does it do anything else?

[brian schuetta]

Interesting discussion! I found a 87' Caprice type thing in the yard today that the same diameter speedo plug. I took that and cut the speedo cable for the screw on part and put it on the trans. So far so good. First race this weekend. Alignment shop Tuesday. Will sort thru everything that was said here and re-think what I did but I needed the trans to stop leaking right now. Thanks guys.

[HandOverFist]

Good to go.