I just bought a set of 285-75-16s, and I need to adjust my speedo. Who do I go through to get that straightened out? Is i the same as the old dodges where you change the pinion gear in the t case? It was off 5mph with my 265s, now im sure its more like 8mph off.


Kasey

 

http://www.transmissionsone.com/

Check these guys, they have the gears to adjust it.. about 1/2 to 3/4 down on the page

 

I noticed when I went to my 285's that my odo - which was off - came nearly to exact distance but like you the speedo went off.
I'm only reading about 2.5mph slow at 70 so I just drive at 67

 

Something interesting is I took a speedo gear/VSS out of a Dually that came factory with 215/85 tires.

and put it in the 93 with 235/85 and it was off by like 7 mph.

had to put the one back in that came original in the 93, shouldn't have been lazy in the 1st place after i did the trans swap.