need s10 rpo codes for axle ratio

[Keith Seymore]

Originally Posted by skymangs

GU2 - 2:73
GU4 - 3:08
GU5 - 3:23
GU6 - 3:42
GT4 - 3:73
GT5 - 4:10
GQ1 - open diff
G80 - Posi

Hope that helps, stolen from some S10 forum. I am doing the same research for my project.

I'm in general agreement with everything so far, except for one minor correction:

GQ1 is base axle for the powertrain combination, not open diff. Base axle ratios vary depending on engine, trans, GVW, etc, GQ1 references the base/standard ratio for that particular combination.

Posi/locking vs open is noted by the presence or absence of RPO G80.

K