MY 87 Formula has the boring 85 mph speedo in it. I picked up a 140 mph speedo yesterday at the junker from an 87 GTA. Will this speedo just plug in and work or will I have problems?

thanks
denis

 

So i'm the first person to do this?

 

ok_this_is_all_from_what_i_read_about_2_months_ago....the_firebird_and
_ta_speedos_are_interchangable_however_the_camaro_and_firebirds_
and_camaro_and_ta_ones_are_not.__with_that_said_i_would_assume_
that_the_ta_and_firebird_speedos_you_have_should_be_just_plug_and
_play.__i_also_recall_that_they_both_should_be_electric_and_not_cable
_driven.

 

Yes, they are both electronic...but will there be different calibrations on the "board/chip" attatched to it for different rear end ratios?

thanks

 

i myself didnt think that there would be any problems, but i can be wrong i dont have a firebird so i dont know. run a search this topic was just brought up a month or two ago.

 

Thanks for the help dude..I searched and found my answer.

 

I replied to a similar question on a different board on this site. I also have an 87 Formula with the LG4. I put a 140 mph cluster in with no problems. Only thing different is the choke light is now the VATS light.