swapped cluster, tach is acting weird

[lone-wolf]

I put a dash from a canadian 3.0l 95 ranger into my 4.0l 97 american truck and now it seems the tach is showing revs about 2-3000 higher than it should be.

Any idea why? I thought it'd be the same.

 

[LIMA BEAN]

Flip the little switch on the back from EH to HEY . Honestly I didnt know there was a difference either so it will be interesting to find out.

 

[lone-wolf]

I'm told there is a difference between the 4.0 cluster and the 3.0 one.
Pretty funny watching it rev off the chart.

 

[rrbrian222]

I have a gauge cluster from a 95 4.0L Exploder in my 95 2.3L Ranger. Tach works fine, spot on. From what I've read when I was researching my swap, the speedometers and tachometers are the same in any given model year so it doesn't matter what engine you have. There are differences with the temperature gauges though and even the layout of the various indicator lamps. On my truck, the engine temp reads a little low, but I could fix that by experimenting with different resistor values on the back of the cluster.

As for your tach being off, is it possible someone pulled the needle off and didn't calibrate it properly when reinstalling it?

I know for certain there are differences in the indicator light layout between a 95 and 97. (95 and 96 are identical, they made some slight changes in 97). Did you swap wiring harnesses with the dash swap, or keep the original 97 harness?

 

[lone-wolf]

Harness is the same. Lights seemed to be in the same spots. Temp gauge doesn't seem to work.
Only difference I can see is the circuit board is a different colour.

Cluster went directly from one truck to the other. Worked fine in the old truck, I'd wager if I put it back in the old truck, it would work fine.
Speedometer seems on the ball, will test against a GPS later.