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    Author Topic: Can I get a 3.90 Ring/Pinion??  (Read 1181 times)

    Offline Simple

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    Can I get a 3.90 Ring/Pinion??
    « on: October 01, 2015 - 09:59:57 AM »
    I am wanting to put a 3.90 ring/pinion only gear in my Dana 60 positrac. Being told my only options are 3.73 or 4.11. Did they ever make a 3.90? I have a 70 Cuda.
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    Offline HP_Cuda

    • Hit the skinny little pedal on the right!
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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #1 on: October 01, 2015 - 02:57:29 PM »

    You will have to get one custom made.
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    1970 Cuda Clone 440 4 speed - sublime green
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    Offline 4406v

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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #2 on: October 01, 2015 - 04:35:32 PM »
    I had the 3:73's in my dana Loved them!!! Not too high for the highway Just enough to run great!!!!
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    Offline Bart

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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #3 on: October 01, 2015 - 05:07:02 PM »
    3.73 also  great all around
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    1970 Cuda 383
    2008 Titan
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    Offline Katfish

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    • 70 Challenger
    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #4 on: October 01, 2015 - 05:11:58 PM »
    I have 3.73s too, too much for extended hwy driving IMO.
    But now that I have the 518 OD they're perfect.
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    Offline Simple

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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #5 on: October 02, 2015 - 12:06:58 AM »
    Quote from: HP_Cuda on October 01, 2015 - 02:57:29 PM
    You will have to get one custom made.
    Any suggestions where?
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    Offline tman

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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #6 on: October 02, 2015 - 01:43:03 AM »
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    Offline magoo426

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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #7 on: October 03, 2015 - 07:01:34 AM »
    I got my 3.73 gears from Dr Diff.  They were great to work with.

    Check them out  www.doctordiff.com/
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    Offline Kevin71

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    Re: Can I get a 3.90 Ring/Pinion??
    « Reply #8 on: October 11, 2015 - 10:36:04 AM »
    I got a strange 60 from dr diff with the 3.90's wasn't anymore than any other gear. 
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