3.73 to 3.27 Ring change not Pinion - Forums at Modded Mustangs
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post #1 of 5 Unread August 28th, 2019, 02:42 AM Thread Starter
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3.73 to 3.27 Ring change not Pinion

I currently have 3.73 gears installed about a yr old, did all new bearings and seals. At the time I didn’t have my turbo kit installed. So now with my turbo setup I wanna change back to 3.27. Since both have 11 pinion teeth and the only difference being the amount of teeth in the ring gear, Could I just change the ring gear and leave the 3.73 pinion the same?
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post #2 of 5 Unread August 29th, 2019, 02:00 AM
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I don't think so. Gear sets are setup and lapped together as a matched set from the factory. To successfully mix-and-match, you would need tooth angles, spacing match,and the mesh engagement to be close enough to yield a decent contact pattern -unlikely. If you monkey with the spacing, you might be able to make it work initially, but it would probably whine like a some-bitch, prematurely wear the gear set and cause you more grief a few miles down the road. I'd say, not worth going cheap on that one.

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post #3 of 5 Unread August 30th, 2019, 12:29 PM
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They do not have the same pinion.. i just went from 3.55 to 3.27s on my turbo car and the pinion of the 3.27 is much larger.

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post #4 of 5 Unread September 20th, 2019, 01:27 PM
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No, you cannot mix and match like that. I would just keep the 3.73.


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post #5 of 5 Unread September 24th, 2019, 01:38 PM Thread Starter
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Quote:
Originally Posted by WrenchThrower View Post
No, you cannot mix and match like that. I would just keep the 3.73.
.

Bought 3.27 ring and pinion gonna do install in a few weeks because I am currently painting the car. I’m going 3.27 because I keep blowing through the gears with my 4r70w before I build max boost.
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