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bluefishgary Nov 14th, 09, 12:11 PM Hi 12 bolt rear # 3859140 CF0501 what is it??? 10 bolt rear # 3863495 B295 CB329W ????? I am looking at these for my ELCO I did open the 10 Bolt and it has a eaton locker with GM gears 3.73 I did not open the 12 Bolt. Thanks Mike Nov 14th, 09, 12:24 PM 3859140 = 65 Chevelle CF =3.31 posi Still looking for the 10 bolt. bluefishgary Nov 14th, 09, 12:34 PM Thanks that was fast now for the 10 Bolt!!!! Mike Nov 14th, 09, 12:40 PM I've gotten as far as it appears to be a 65 from Warren assy with a 3.36 open , but it could be a 75. What's the pn off the ring gear? bluefishgary Nov 14th, 09, 12:46 PM I did not get part ## off ring gear!!! bcmiller Nov 14th, 09, 1:06 PM 10 bolt rear # 3863495 B295 CB329W ????? Could you check those numbers again? I can't find that either. Can you give us a little more information. Width measurement from backing plate to backing plate and size of the pinion nut? This is a coil spring rear with spring perches, correct? bluefishgary Nov 14th, 09, 1:21 PM Yes its 54 to backing plate flat spring perch. No nut size!! it looks like a chevelle rear but I can not be certain. bcmiller Nov 15th, 09, 12:45 AM Width sounds about right. I am not familiar with that casting number though. I guess it could be a GM of Canada unit. I believe DaleM is looking for unusual casting numbers on his page at http://www.chevellestuff.com/qd/generic_rear_axle_info.htm He might be able to help. | ||