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7 1/4 rear, ring & pinion
https://slantsix.org/forum/viewtopic.php?t=23109
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Author:  Junior [ Tue May 08, 2007 8:22 pm ]
Post subject:  7 1/4 rear, ring & pinion

they are all interchangable right? i have a 66 rear with the small bolt pattern and 3.23 gears and i just put a 75 rear with 2.73's and they just arent cutting it. if they are interchangeable i would like to put the 3.23's into the newer rear. any help on this would be great.

Author:  dakight [ Wed May 09, 2007 5:20 am ]
Post subject: 

I'm about to do the same thing and just went through the same round of questions. Consensus seems to be that it should work just fine.

*edit*
I did notice that there is a difference between early and late in the size of the pinion nut but I don't know when the change was made. I have 3 rears with a small nut and 2 with a large one. The 2 of the 3 small ones came from '62 cars while the 3rd I believe came from a '64. One of the large ones is in a '62 but I don't believe it is original and the other came from a '74. I believe - but am not certain - that the seals, pinion bearings, side bearings, etc. are all interchangeable.

Author:  sandy in BC [ Wed May 09, 2007 6:14 am ]
Post subject: 

Your 3.23 gears will direct interchange intop the later rear.......and like the ones I swapped 7 years ago will last as long as you keep your foot out of it.

Author:  Junior [ Wed May 09, 2007 8:27 am ]
Post subject: 

thanks for the replys. as for keeping my foot out of it..... i dunno. i blow through these rears like nothing(spider gears) and im trying to save up for something better but thats just not gonna happen any time soon.

thanks, Junior.

Author:  Aggressive Ted [ Fri May 18, 2007 1:10 pm ]
Post subject: 

You know, I have gone through (3) of these rears in 6 years. I drive 120 miles a day, not hard, but alot of miles on twisty two lane roads........I finally broke down and went with modifying a C-body 8 3/4 rear. Yes, it has to be shortened to fit, but what a welcome relief. I can stand on it anytime I want and bust the wheels loose and not have to worry about it. I had Randy's Ring & Pinion go through the rear end and they do a superb job setting it up. It is nice to have the 10" brakes too. They have saved me more times than I can count.

Author:  Junior [ Mon May 21, 2007 7:54 pm ]
Post subject: 

i do plan on going with a bigger rear sometime in the near future but i just dont have the money to do that right now, but i have parts laying around for the piece i have now so...

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