72 Turbo Hydromatic Speedo Housing ??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sick472 · 08-26-2018, 01:32 PM

I have a TH-400 in my 72 Truck behind a Pontiac 400 motor. I believe the tranny and motor combo can from a 72 car. Anyhow, After several years in boxes the thing is going back together and for some reason I have two different speedometer gear housings. They both are from TH400 trannies, I think, and appear that either one would work in the transmission. One is pretty basic and the other has a wire coming out it. I am not worried about the gear tooth at this point, I'll figure that out as tires get selected.

Any comments on which one might be better to use and/or what the wire is for?

08-26-2018, 01:32 PM	#1
sick472 Registered User Join Date: Jul 2015 Location: Sedalia Mo. Posts: 1,131	72 Turbo Hydromatic Speedo Housing ??? I have a TH-400 in my 72 Truck behind a Pontiac 400 motor. I believe the tranny and motor combo can from a 72 car. Anyhow, After several years in boxes the thing is going back together and for some reason I have two different speedometer gear housings. They both are from TH400 trannies, I think, and appear that either one would work in the transmission. One is pretty basic and the other has a wire coming out it. I am not worried about the gear tooth at this point, I'll figure that out as tires get selected. Any comments on which one might be better to use and/or what the wire is for? Attached Images __________________ He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20



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