I have a '91 DX hatch, 5-speed, and an '89 LX automatic. I want to take the gauge cluster from the '89 and put it in the '91, because the '89 has a tach. I looks like a straightforward swap. Is there anything special I should know before I start this? Will the fact that the '89 is an auto affect anything. Does my '91 have a wire for the tach, even though it has no tach?

Any tips are appreciated!

 

As far as i know the 88-89 and the 90-91 clusters are different and require changes

 

They look the same. Anyone else know about any differences?