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I don't think it will work right. That sensor will give you cam speed which is half that of the crank.

FWIW I've seen a tach that looks very much like these in the M35A3's. the one in the hmmwv also didn't have a provision for back lighting.

you got a deal but your is very different from mine. mine had a single connector that came out the back and then branched out in the truck and went to the alternator, fuel level gauge and ground.

the 80E shouldn't be running that kinda of temp. are you sure the TC is locking and your cooler is in good condition?

RE: Re: RE: Re: M998 Hmmwv tach installed. I have the std 6.2 NA. I run about 3k at 60mph and the motor seems to like it. this thing doesnt have any power until it comes up above 2500.

RE: Re: M998 Hmmwv tach installed. ya. some stuff. I didnt use the center dash piece that comes in the kit bc it deletes the air vent on drivers side and doesnt have the holes for the radio rack. I put a notch in the original one and all is well. I didnt drill another hole in the firewall...

I found that this motor in the gm 1/2T pickups have a redline of 3600rpms. I usually run mine about 3k and that nets me about 60mph. I just cant bring myself to run it over that. it sounds like it wants to come out from under the hood.

I dont think it is the same. but for the hmmwv I simply found a 24V switched source (The mil used the fuel gauge for it.) Then you use the IGN trigger thats on the generator. you run it in line with the IGN wire on the generator.

for those that dont know tachs dont normally come in the hmmwv and they are hard as heck to find and very pricey when you do. I was fortunate enough to find one on epay for a hefty price. Install wasn't bad. drill 4 hole in the front windshield frame. Install new center dash cover and wire...