ratio box for 40" tires???

[Disciples Performance]

hey guys my buds 79 3/4 ton is on 40" MTR's now is there anyone who makes an aftermarket ratio box so the speedo will read correctly???

Thanks

 

[mike n]

Don't know what rear gears you have, but on my old 79 3/4 ton with 40" Gumbos and 4.88 gears, I deleted the ratio box and screwed the speedo cable directly into the transfer case and the speedo was accurate.