Speedometer gear

[whitehot84]

What speedometer gear will I need for a Turbo 400 used in a GN with a 3.42 geared rearend.?
Thanks in advance

 

[MeanBuicks]

Try here:

www.tciauto.com/tech_info/speedo_gears.htm

 

[blackplague]

the last one i did was:

17 drive gear teeth on the output shaft and 45 on the speedo gear housing for 3.42's with a 26" tire. For a 28" tire the combo was 17 drive teeth and 43 on the speedo gear housing. Hope that helps.