I have '91 2.73 posi in the car and I'm swapping to a 3.42 posi (89 car). Do I need to swap speedo gears? Where do I get them and which one do I need?

What will happen if I don't get a speedo recalibration gear, will it make the car undriveable and add "ghost" miles?

Is it easy to change out, like can I do it after the install sometime, or does it have to be during the rear swap?

Ok, no more questions.

Thanks.

-Kevin

 

Contact jmd on this site. He can provide you with the proper gears and info.

JamesC

 

i thought the 91's had electronic sensor instead of the speedo gears.... but someone will chime in hear and correct that.


if not, go here
http://www.transmissioncenter.net/sp...n_______va.htm

i bought my speedo gears from here and used a 39/15 combo for 3.27's. they reccommend a 45/18 setup but that requires you to buy a whole new housing for the 45 gear.

for 3.42's they suggest a 45/17 combo but your gonna have to buy the housing for 45 gear

 

They do have electronic VSS's, but the speedo gears still need to be changed when doing a gear swap.

 

^ sweet, thanks, i wasnt quite sure