http://www.pirate4x4.com/forum/showthread.php?t=697614
"the wms-wms on the IFS for the ZR2 is about 64" "
So my front is about 64", and rear 62". What axles should I be going with. A regular S10/blazer would be 60-61" front 58-59" rear. ZR2's are about 4" wider then non ZR2's. So im thinking if I go about a 58-59" axle, I can run some 8-10" wide rims with a 3" backspacing.
What you guys think?
S10 Rear Axle Info
There's 3 widths of S10 rearends.
Doesn't matter if it's a Blazer or a truck, they share.
WMS to WMS width
55" = 2WD
59" = 4WD
63" = ZR2 off road option
7.5 vs 8.5 school
8.5 rearends are not common.
Look in 2nd generation S10's that originaly had a 5 speed trans.
Disc brakes were an option in '95 and became standard about '99.
7.5" rear end.
The axle tubes are straight where they enter the pumpkin
The rear end cover has a more squareish shape
8.5".
The housing cover is almost completely round
There's a bulge in the axle tube just before it goes into the pumpkin
Another bit of S10 axle info:
Look in the glovebox for the production "data plate" sticker.
It has the RPO codes to determine ratios and diff type.
GU2 2:73 ratio
GU4 3:08 ratio
GU5 3:23 ratio
GU6 3:42 ratio
GT4 3:73 ratio
GT5 4:10 ratio
GQ1 Open Differential Rear Axle
G80 Positraction/Locking Rear Axle
example:
4:10 posi rear would have two RPO's.
GT5 & G80
Exceptions to the rules:
If you find only a GQ1 on the data plate and no
"GU" or "GT" codes, then it's an open diff "standard ratio" of 3:08.
If there's no "G80" or "GQ1" it's an open diff.
