turbo 400 electronic speedo? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

75chev4x4 · 07-16-2012, 11:14 PM

I'm tired of messing with my stock mechanical speedo in my 75 k20 with a turbo 400. Just cant get it to work right and the little cable tops and stuff are hard to find. In the interest of having a very accurate speedo what are my options for using an electronic speedo like autometer on this truck and is it hard/expensive to do?

RandyP · 07-17-2012, 08:03 AM

I might be wrong here, but my thought is even if you switch the gauge to something with an electronic readout it is still going to have to get its signal from a mechanical cable? Unless you switched to a trans with electronic hookup, like a 4l60e or something.
Then again, for all I know the new autometer gauge has some sort of adapter that plugs in to a converter box or something that goes where the speedo cable hookup is.

**Desert1957** · 07-17-2012, 10:08 AM

I used the "Autometer" electric sender and gauge with the 400 Turbo in my HotRod.

Desert

07-16-2012, 11:14 PM	#1
75chev4x4 Registered User Join Date: May 2012 Location: Estacada, Oregon Posts: 254	turbo 400 electronic speedo? I'm tired of messing with my stock mechanical speedo in my 75 k20 with a turbo 400. Just cant get it to work right and the little cable tops and stuff are hard to find. In the interest of having a very accurate speedo what are my options for using an electronic speedo like autometer on this truck and is it hard/expensive to do?

07-17-2012, 08:03 AM	#2
RandyP Getting Old; Going Broke Join Date: Apr 2010 Location: Owasso OK Posts: 2,764	Re: turbo 400 electronic speedo? I might be wrong here, but my thought is even if you switch the gauge to something with an electronic readout it is still going to have to get its signal from a mechanical cable? Unless you switched to a trans with electronic hookup, like a 4l60e or something. Then again, for all I know the new autometer gauge has some sort of adapter that plugs in to a converter box or something that goes where the speedo cable hookup is. __________________ *Why is every used 350 sbc out of a corvette?* There's only two things that excite a man, expensive toys and real expensive toys. *VEGETARIAN: That's an old Indian word meaning "I don't hunt so good."* When the going gets tough, switch to power tools.

07-17-2012, 10:08 AM	#3
Desert1957 Registered User Join Date: Apr 2009 Location: New Freedom Pa. Posts: 1,335	Re: turbo 400 electronic speedo? I used the "Autometer" electric sender and gauge with the 400 Turbo in my HotRod. Desert



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