Originally Posted by jackietreehorn (Post 20200556)

Have you checked the fuse that powers the speedo/tach?

Originally Posted by My4Fordtrucks (Post 20200728)

…or run the KOEO self test to see if the computer has anything to tell you about what is wrong.

Originally Posted by alanp561 (Post 20200454)

I have a '95 F 150, 351 Windsor, E40D trans, speed sensor located on top of rear axle. First the speedometer went haywire, jumping all over the place. Then the engine started stumbling while driving and trans would upshift or downshift depending on which way the wind was blowing. Truck would stall when I put it in reverse. Everything I read pointed to speed sensor so I replaced that. Driving down the road 10 minutes later and it all starts happening again. More reading tells me that something in the speedometer cluster is sending a screwed up signal to the trans. Found another cluster in a salvage yard and changed that. Now the truck runs bad just like before and neither the speedometer or tach work. My plan is to go with a an Edelbrock 1406 because I have one, Edelbrock 2181 manifold that I paid $125 for in the original box that looks like new, fuel line regulator using the existing tank pumps, and replacing the E40D with a C6. Do all C6's have mechanical speedometers and what do I use for kick down linkage? I figure I'm going to have to put mechanical gauges in there anyway so I might be able to replace the entire speedometer cluster with one I build to fit the hole in the dash. I have a new factory stock distributor. Can I use that and the stock CD box or do I need something else? I know there are a lot of questions here but I only want to do this one time..

Originally Posted by alanp561 (Post 20200951)

Bought an EBD II scanner, tried running the KOEO self test and got two codes. One told me the speed sensor was bad but I had just replaced it. The other had to do with the wiring from and to the computer was bad. I was lost at that point. I'm an analog guy and just want to put a carb on there and simplify my wiring. New question, will a C6 mate up to the existing torque converter or am I going to have to change that as well?

Originally Posted by NotEnoughTrucks2014 (Post 20201205)

There are so many pitfalls here that I just want to say don't do it! But of course, you likely won't listen. Best advice I could offer is if you want a perceptably simpler truck, buy an older truck, don't mess with what you have. If fixing it is beyond your skill set, move on to something else. You may not thank me now, but you will eventually.

Originally Posted by Scndsin (Post 20201580)

The flex plate on the 5.8 with E4 will accept a TC from a C6. Torque converter will be different.

After watching these conversations & conversions for a while, the success rate & costs expected rarely succeed over fixing what is wrong with the truck as is.

But folk will help regardless, again, good luck.

Originally Posted by alanp561 (Post 20200951)

Bought an EBD II scanner, tried running the KOEO self test and got two codes. One told me the speed sensor was bad but I had just replaced it. The other had to do with the wiring from and to the computer was bad. I was lost at that point. I'm an analog guy and just want to put a carb on there and simplify my wiring. New question, will a C6 mate up to the existing torque converter or am I going to have to change that as well?

Originally Posted by thechief66 (Post 20202031)

He did mention a pressure regulator in his post from yesterday...

Originally Posted by alanp561 (Post 20200454)

More reading tells me that something in the speedometer cluster is sending a screwed up signal to the trans. Found another cluster in a salvage yard and changed that. Now the truck runs bad just like before and neither the speedometer or tach work...