1988-305-tbi

so i'm swapping in a 9 bolt 3.27 posi in place of a 10 bolt 2.73,open rear, i pulled the speedo gears off of the 9 bolt car, there 17/45 gears, but i cant use them cause the donor car had an electric speedo and mine is cable driven, so i'm going to buy a new driven gear, i found a speddo gear calculator on bowtieoverdries, and it says to use a 17/43 setup with my 26" 255/50/16 tires,


so what gears are everyone using with a 3.27 rear and 26" tires

Wadebryant

Is the drive gear in your transmission tail housing is the same as the donar? If I remember correctly, you should be able to use the driven gear with your speedo cable housing. The plastic driven gear should swap.

1988-305-tbi

the drie gears are the same style, and teeth, "17" but the driven gear is a different style from cable to electric driven units, so i def need a new driven gear and i'm not sure wich one to get, a gear calculator on 700r4.com

http://www.700r4.com/speedoCalc/speedocalc.shtml


says to use a 17/43, but i've also read post where people use 17/43, 17/44, and 17/45 gears

Wadebryant

Sorry for the bad info, I went from cable to electronic. Anyway, try this site, it may help.
http://www.tciauto.com/products/comp...eter_gears.asp

abyliks

will all those work with the VSS on later ones?

Pat Hall

iTrader: (31)

http://cgi.ebay.com/ebaymotors/Drive...mZ140003543454 The gears in the link I posted will work with the electric VSS units or the cable style sending unit as long as you have the one that uses a metal shaft with the d-shaped end. They also have them available in 44 and 45 teeth as well. They also have the all plastic, cable style gears if that's what you need.