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alright as the title says its an 85 s-15 4wd with a 5spd now i belive the sticker in the dash says 4.10s...was this an option?? i need a new rear my old blew.. and i beleive it had 9,35 or 9.37 on it i put one in that said 11.40 but its the wrong ratio now i seen the rpo...post and i'm gonna look at those stickers but the question is where will i most luckily find this rear on blazers? or s-10s auto? stick? v6's? or 4's? i dont wanna pull a bunch of pumpkin covers... just hoping to find the right gear set and is the 4.10 availible in a g80 rpo or no??
 

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Best bet is a 2.5l or 2.8l that had the factory towing option.
But look for these codes stamped on the front of the right axle tube 3" to 5' outboard of the carrier
CDF,CDH*,BTC,BTD*,HCA,HJC,HKC,HCD*,HJG*,HKG*,HZU*.
The * is not part of the code I just put it there to indicate the ones with the g80 locker.
Those codes cover most axles up to around 89. Which is where you are most likely to find the 4.11 as it was not used in the 4.3l as far as I know.

the 9:37 is stamped on the ring gear on the 4.11's
the one stamped 11:40 is a 3:63 But I never heard of a 3.63. Are you sure it wasn't stamped 11:41? That would be a 3.73.
41/11=3.73
 
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