Speed-Cal

[85MustGT]

After I got the 4.10s I ordered the white speedo-gear and its off about 10%. Before installing the speed-cal should I put the original yellow gear back in? It originally had 2.73 gears.

 

[2002BLGT]

After I got the 4.10s I ordered the white speedo-gear and its off about 10%. Before installing the speed-cal should I put the original yellow gear back in? It originally had 2.73 gears.

yes put the original back in ....thats what its calibrated for ....