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#1
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3.23 8.2" BOP ring and pinion available new anywhere?
I want to convert my 3.55 open rear to the correct (original) 3.23 rear gears (original manual + A/C car) and would like to make it a posi (officially Safe-T-Track but I just use posi as general term) while I'm in there. So far I have found plenty of diffs for up to 3.23 and then the 3.36's and higher, but I'm striking out finding just a set of the 3.23 gears. Am I looking in the wrong places?
Shop manual says one diff for 2.73-3.08 and another for 3.23-4.11, but all current diffs I see online cut over at 3.36? Any help appreciated! I'd like to get my rpms down some since I'm running the correct Muncie M20 trans. Thanks! |
The Following User Says Thank You to tallrandyb For This Useful Post: | ||
#2
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i got one for sale out of my 64 gto let me know if you need picks
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#3
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sounds great if you want to post/send some pix. I assume you have the full diff+ring+pinion that I can drop in, I'd just need new bearing sets?
Did the posi hold well? tire marks pics? |
#4
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3 different cases, one 2.56-2.73, one 2.93-3.23 and one 3.36-4.33.
Also 3 different styles, one 1964-65 6 bolts holding case halves, one 1966-69 8 bolts holding case halves and one 1970-72 8 bolts holding halves and left-handed bolts holding ring gear. |
The Following User Says Thank You to Kenth For This Useful Post: | ||
#5
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323
hi just 323 ring and pinion and carrier
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The Following User Says Thank You to 62 bv For This Useful Post: | ||
#6
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Quote:
Most replacement gears are 3.55 and steeper.....I haven't run a gear that steep in over 30 years and never will, because my cars are used on the street. Understand the OP wanting to drop his cruise rpms..... a 3.23 is just about perfect as a compromise gear between performance and touring with no overdrive.
__________________
Jeff |
#7
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Quote:
So if I have a 3.23 ring and pinion pulled from a 64 going in my 65 GTO, can I use this posi and this install kit: https://www.ronsmachiningservice.net...-3-23-5420114/ https://www.summitracing.com/parts/yga-14085 This shouldn’t be this hard to get my rpms down. I had my years of fun with a 4.11 chevelle 12-bolt we swapped in, but even my 3.55’s now have it wound up too high for my liking at 80 on the highway. Thanks! Sent from my iPad using Tapatalk |
#8
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that will work
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#9
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Changing from a 3.55 to a 3.23 gear isn't going to do much to your 80 MPH RPM.
Assuming 27" diameter tires, your 3.55 rear gear will have your engine turning about 3525 RPM. A 3.23 would slow it down to just over 3200 RPM. Seems like a lot of work for a 10% reduction in engine speed.
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
#10
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Quote:
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#11
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Quote:
__________________
Jeff |
The Following User Says Thank You to geeteeohguy For This Useful Post: | ||
#12
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Thanks to 62 bv for the 3.23 ring and pinion set. rebuild kit purchased from Summit and 2.93-3.23 range posi purchased from Ron's Machining Service. Now I just need to find a reputable installer in the Orlando area.
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#13
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how far are you from sarasota i have a friend there owes salt works he can do it for you ask for tom tell him brody sent you
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#14
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Thanks Brody, that is about 3 hours from me so would be a long haul to wait or drop off. I'm in the Orlando/Winter Park central Florida area.
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