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67RAT Jun 24th, 99, 4:49 PM my freind needs an axle for a 12 bolt 71 monte carlo with 3.08s.what years will fit? late 60s early 70s as long as the lentgh and splines are the same?also someone told him a 10 bolt would fit,but i told him i dont think so. am i wrong? 67rat member #199 RussD Jun 24th, 99, 5:49 PM Any 68-72 Chevelle or Monte Carlo 12 BOLT axle will work. ***A little fix-68-72 Chevelle, or 70-72 Monte, they didn't make 68 or 69 Montes. I just wanted to clarify! ------------------ Steve 64SS-327-4spd-sold to Original owner! In process of finding a 65 Team Chevelle Member #71 [This message has been edited by Steve D 64 SS (edited 06-25-99).] 67RAT Jun 24th, 99, 5:58 PM thanx steve 67rat DZAUTO Jun 24th, 99, 8:05 PM Same years 10-12bolts, 100% bolt in swap. And also, The 10bolt is a 3.08 and the 12bolt is a 3.07. Honest. ------------------ Bob Tiley Jun 25th, 99, 7:16 AM The 12 bolt rears around here have 37 teeth on the ring gear and 12 teeth on the pinion. 37 divided by 12 = 3.083333 ratio. RussD Jun 25th, 99, 1:00 PM EDITED!! I miss understood DZ! http://www.chevelles.com/forum/redface.gif ------------------ Steve 64SS-327-4spd-sold to Original owner! In process of finding a 65 Team Chevelle Member #71 [This message has been edited by Steve D 64 SS (edited 06-28-99).] 67RAT Jun 25th, 99, 2:00 PM thanx guys! i thought 12 bolts had 3.08s 67rat member #199 Hugh Jun 28th, 99, 8:37 AM I don't think that DZ is saying that 10-12 bolt axles interchange, he is saying that 10 and 12 bolts are direct bolt up swaps in the '68-72 chevelles and '70-72 Monte's. 10 bolt axles do not interchange with 12 bolts! Harley Jun 28th, 99, 8:48 AM Right, splines are different. 28 and 30 or 31 I think. (but that may be Camaro). DZAUTO Jun 28th, 99, 10:38 AM What I meant was that 10-12bolt COMPLETE axle assemblies are a 100% bolt in swap. The internals are not. Bob, The 3.07 12 bolts I have seen (and that is only 2) had 14-43 teeth. One of them is a 69 in my 70 conv. Also, the parts book lists 3.07 gears. This makes me wonder if there were 2 different sets of 12 bolt R&P gears. Does anyone know if there was both a 3.07(14&43 teeth) and a 3.08(12&39 teeth) 12bolt gears. (I want everyone to go home tonight, remove the rear cover, count the ring and pinion teeth on their 3.07/3.08 12bolts and report back by 8am tomorrow) This should be interesting. ------------------ DG Jun 28th, 99, 7:10 PM The BOP?? 12 bolt I have setting in the garage has the 43/13 =>3.07:1 gears. ------------------ DG Springfield, Ohio 70 Chevelle Malibu www.wright.edu/~s001dga/chevy.htm (http://www.wright.edu/~s001dga/chevy.htm) TEAM Chevelle Member #0086 | ||