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OEM 3.55 Ring & Pinion 8 3/4 Axle.
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Beltran
Posted 2016-11-15 8:55 PM (#526358)
Subject: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
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Location: Michigan
I need a OEM 3.55 Ring and pinion for an 8.75 rear axle. It should have a pentastar or the word Formate stamped on the gear. If anyone has a one or knows where I can get it please message me.
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hindsight inc
Posted 2016-11-16 11:22 PM (#526441 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Regular

Posts: 59
2525
We need to know which case you have. Is this for a pre-62 case, or 62+, in which case there are three unique R&Ps. Tell us the last three digits of the casting number on your center-section.
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Beltran
Posted 2016-11-20 1:49 PM (#526701 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
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Location: Michigan
The axle is out of a 69 roadrunner. I can take a 489 or a 742. I have the 742 in there now but the axle shop can swap the pig for me and make either set work. The important part is that it's OEM. All the current copies are hit or miss with axle whine. You can't trust any of them.
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57chizler
Posted 2016-11-20 3:58 PM (#526707 - in reply to #526701)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 3768
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Location: NorCal

From my personal experience, the factory gears in the 489 are the most likely to make noise.
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Beltran
Posted 2016-11-23 9:01 AM (#526929 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
100050010010025
Location: Michigan
Still looking for these parts, if anyone has a source they can suggest or connection they can help me make, please and thanks in advance.
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Beltran
Posted 2016-12-03 4:32 PM (#527799 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
100050010010025
Location: Michigan
And still looking. a mopar axle 1960 + might work if you have one. Depending on the Carrier numbers.
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Powerflite
Posted 2016-12-03 11:39 PM (#527824 - in reply to #527799)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert 5K+

Posts: 9604
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Location: So. Cal
I really think you will be better off just purchasing an entire center section all ready setup. You can usually find them in your local craigslist and just go pick them up. I have swapped used gears from the swap meet or craigslist on dozens of occasions without ever tearing them apart and never had issues with gear noise. I have a set in my garage that I picked up this way.
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Beltran
Posted 2016-12-05 8:48 PM (#527973 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
100050010010025
Location: Michigan
I am looking there too. Will check out some swap meets in January as well.
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Powerflite
Posted 2016-12-06 12:14 PM (#528024 - in reply to #527973)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert 5K+

Posts: 9604
500020002000500100
Location: So. Cal
If you are in a hurry, and are willing to pay alot for shipping, I would probably sell you mine.
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Beltran
Posted 2016-12-06 8:22 PM (#528068 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
100050010010025
Location: Michigan
I am not in a hurry, but I may get desperate in a few months. I will reach out if it comes to that.
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60 dart
Posted 2016-12-07 12:18 AM (#528079 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert 5K+

Posts: 8947
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Location: WHEELING,WV.>>>HOME OF WWVA
if its setup correctly a good set from someone like us gear , nitro or richmond there should be absolutely no problems . the most common mistake replacing
gears is getting the right people to do the install , period! ,,,,,,,,,,,,,,, i won't even tell ya how the local mopar repair told me how they do it , just plain crazy ---------------------------------later
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Beltran
Posted 2017-05-09 9:08 PM (#539802 - in reply to #526358)
Subject: Re: OEM 3.55 Ring & Pinion 8 3/4 Axle.



Expert

Posts: 1730
100050010010025
Location: Michigan
Well I got a new gear and had the Ring and Pinion Shop of Waterford do the install. They worked this axle before and it was fine. I have put about 100 miles on it and it's making bad vibrating noises at highway speeds. It's going back in next week.
It feels like the axles are resonating or something. It vibrates so much it will slow the car down! /sigh....
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