i wnat to pull a posi 3.73 from the junkyard and slap it onto my car. what cars should i look for?? i currently have a open 3.23 rearend.

 

Look for 80's S-10, a lot came with 3.73's

 

Only problem is those S10's didn't usually have posi(in fact rarely because the deep geared ones has the 4 banger in them). Early model thirdgen's could have posi 3.73's, but are hard to find. A used posi is worn, and could be worn enough that it doesn't work anyway. If you plan on keeping the car, IMO, put new stuff in the rear.

 

what about getting the s10 rear with the 3.73 gears then making that posi.. i dont know anything really about rear ends, so please enlighten me

 

i suppose my GT4 YC4 Y06 axle under my 84 L69 MD8 MXO Z28 is desireable ?? maybe ? lol....

yeah 3.73 was under the 86 S-10 with 2.5L 4 bangers with o/d auto and 3.42 is under the 91 4.3L S-10 with o/d auto, my bro had one of each and the rpo codes showed this fact

but they dont have no 9.5" ring gear though ! saginaw apparently made soem oddball 10 bolts in our cars ? i have one whatever it is... i had no clue before tonight that any such wierdo axle existed, aluminum drums must be the key, i have them on mine, so....

 

9.5 inch ring gear!! Do you have some pics of this? That has to be a big housing to carry a 9.5 inch ring gear. Back in 1950 they had some 9.5's, 14 bolt though. Maybe you have 9.5 drums or something. I really, really doubt you have a 9.5

 

They are 7.5 ring gears, and I believe that the gears are interchangable between the s10s also.

Ben