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8 1/4 R&P commonality???? #670316 04/15/10 11:01 AM 04/15/10 11:01 AM
Joined: Jan 2003 Posts: 8,940 Holly/MI D Dean_Kuzluzski OP master
Dean_Kuzluzski OP master D Joined: Jan 2003 Posts: 8,940 Holly/MI	I know the splines changed for the differentials at around the 1996 timeframe.......... But what is the changes, if any, to swap around 8 1/4 ring and pinions from a newer JY Dakota/Durango into an 80's era Mopar??? R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04

Re: 8 1/4 R&P commonality???? [Re: Dean_Kuzluzski] #670317 04/15/10 06:47 PM 04/15/10 06:47 PM
Joined: Feb 2010 Posts: 18,493 Granite Bay CA Kern Dog Striving for excellence
Kern Dog Striving for excellence Joined: Feb 2010 Posts: 18,493 Granite Bay CA	Dr Diff will know, but for now, I can tell you that my 1973 A body 8.25 was fitted with a clutch type sure grip AND 3.55 gears from a 94 Dakota 4x4. My axle guy said that the 8.25 is similar from 1969 to 1996!

Re: 8 1/4 R&P commonality???? [Re: Kern Dog] #670318 04/15/10 09:35 PM 04/15/10 09:35 PM
Joined: Jan 2003 Posts: 8,940 Holly/MI D Dean_Kuzluzski OP master
Dean_Kuzluzski OP master D Joined: Jan 2003 Posts: 8,940 Holly/MI	OK, thanks a bunch. I know the axle splines and mating differential changed in 97 but don't recall ever hearing about it changing in relationship to the diff's mounting to the ring gear being different or a change in the size pinion length or pinion bearing size. R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04

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