Im going from a NA open diff to a GXL lsd diff. Just swapping the pumpkins.

Any changes to cars speedo or gas mileage or anything?

 

not that i noticed. then again, my fuel pump, and my gas gauge didnt work.
but to the best of my knowledge, shouldnt make a lick of difference. besides the different gearing ratios.
what year is the n/a and what year is the gxl?

peace

 

my cars a 87 BASE and the GXL is also a 87

 

shouldent change anything. im also assuming that you are going to change the tranny, and half-shafts.
you will deff have a different gearing, but not bad. maybe a little aggressive, but you will have a much better feeling of the car..........hopefully, during spirited driving, also assuming that you do that as well.

peace

 

As long as neither were from an Automatic or convertible then they will both be 4:10 which means the gearing is exactly the same, there will be no difference in speedo gear....

 

thanks

 

If the limited slip unit has a different ring and pinion just swap your current ring gear...

 

Nah im pretty sure the ring and pinions are exact.

 

Actually only the S4 verts had a different gear ratio. the S5 verts were 4.10...