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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Putting new 9” housing and axles in the 66

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    2/13/2020 5:37 PM  #1

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
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    Putting new 9” housing and axles in the 66

    New Currie housing and axles going in.  Can’t decide whether to replace the 3.70 gear set with 3.50.   Has 427 stroker and TKO600.

    Cruises 70 mph at about 2,200 with the 3.70’s.

    Opinions?



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    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    2/13/2020 6:08 PM  #2

    Nos681
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    From: Atlantic Mine, Michigan
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    Re: Putting new 9” housing and axles in the 66

    Which one will prevent the little oil’ lady from Pasadena spank your behind?😁

     

    2/13/2020 6:12 PM  #3

    Bullet Bob
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    Re: Putting new 9” housing and axles in the 66

    I like the 3:55.  Runs around 2150 with the .67 OD of the AOD trans.  You should expect around 100 RPM less from were it is now going to a 3.55.  What's the torque curve on the engine?  That will give a clue as to where it might be happiest on a steady cruise.
     

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    2/13/2020 6:18 PM  #4

    GPatrick
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    Re: Putting new 9” housing and axles in the 66

    With a 2.87 first gear I suspect that 3.50 gears won't be an issue in slow traffic.  I doubt you'll see any improvement in economy but it will probably be a little quieter at speed.  In first gear you'll get better burnouts because you'll be spinning the tires faster with the 3.50's

     

    2/13/2020 7:25 PM  #5

    lowercasesteve
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    From: Auburn, Ca
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    Re: Putting new 9” housing and axles in the 66

    2000 rpm @ ~65 is a lot quieter than 2200.  I like it better.  My wife does too.

    Original owner - 351w,T-5, 4whl disks, power R&P
     

    2/13/2020 7:33 PM  #6

    50vert
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    Re: Putting new 9” housing and axles in the 66

    3.50 will make first a fraction more usable
    Didn't you already have a custom housing? Or are ya still tryin ta fix the noise?.

    "Those telephone poles were like a picket fence"
     

    2/13/2020 8:26 PM  #7

    MS
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    Re: Putting new 9” housing and axles in the 66

    Trying to get rid of harmonic vibration/noise that appears at 75mph.  Been chasing it since 1992 when previous housing was installed.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
       •Thread Starter
     

    2/13/2020 9:07 PM  #8

    Nos681
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    Re: Putting new 9” housing and axles in the 66

    Which one will prevent the little oil’ lady from Pasadena spank your behind?😁

    With the torque of the 427, 3.50 would be my choice.
    Otherwise first will be kinda useless.

    I’m sure you’ll still be able to leave your signature😎
    Your shop looks great.👍🏼👍🏼

    Last edited by Nos681 (2/13/2020 10:07 PM)

     

    2/13/2020 9:18 PM  #9

    rpm
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    From: Bakersfield, Ca
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    Re: Putting new 9” housing and axles in the 66

    I've got a 3.50 Ford gears traction loc N case with Daytona support I'll sell ya

    That shop is coming along nicely. Did I miss the start of framing pics?

    Last edited by Bearing Bob (2/13/2020 9:19 PM)

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    2/13/2020 10:15 PM  #10

    6sally6
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    From: Surfside Beach,SC
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    Re: Putting new 9” housing and axles in the 66

    With the massive torque of the 427 and the "mild girlie camshaft"....the 3.50:1 gear  will  deliver .......period. 
    2000RPM @70 MPH  you'll still be able to pass most anything....and not even cut in the secondaries!
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    2/13/2020 10:29 PM  #11

    MS
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    From: Canyon Lake, Texas
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    Re: Putting new 9” housing and axles in the 66

    Bearing Bob wrote:

    I've got a 3.50 Ford gears traction loc N case with Daytona support I'll sell ya

    That shop is coming along nicely. Did I miss the start of framing pics?

    Framing started Wednesday. Pic shown was Thurs evening.

    PM’d you

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
       •Thread Starter
     

    2/13/2020 11:23 PM  #12

    Bolted to Floor
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    Re: Putting new 9” housing and axles in the 66

    I like the 3.50 in mine. It makes 5th gear usable from 45 on up.

    John  -- 67 Mustang Coupe 390 5 speed
     

    2/14/2020 12:26 AM  #13

    rpm
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    Re: Putting new 9” housing and axles in the 66

    Bearing Bob wrote:

    I've got a 3.50 Ford gears traction loc N case with Daytona support I'll sell ya

    I received a PM related to my post, and it went  something like this:

    "Would someone REALLY want to buy anything bearing related from this guy? LOL"

    I laughed me arse off

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    2/14/2020 12:41 AM  #14

    50vert
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    Re: Putting new 9” housing and axles in the 66

    That IS funny!!

    "Those telephone poles were like a picket fence"
     

    2/14/2020 6:32 AM  #15

    Nos681
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    Re: Putting new 9” housing and axles in the 66

    Funny stuff Bob! 🤣

     

    2/14/2020 10:52 AM  #16

    RV6
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    Re: Putting new 9” housing and axles in the 66

    Bearing Bob wrote:

    Bearing Bob wrote:

    I've got a 3.50 Ford gears traction loc N case with Daytona support I'll sell ya

    I received a PM related to my post, and it went something like this:

    "Would someone REALLY want to buy anything bearing related from this guy? LOL"

    I laughed me arse off

    Bwahahaha! 

    Gary Zilik - Pine Junction, Colorado - 67 Coupe, 289-4V, T5
     

    2/14/2020 8:54 PM  #17

    MS
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    From: Canyon Lake, Texas
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    Re: Putting new 9” housing and axles in the 66

    Has anyone tried the new US GEAR STEALTH SERIES gears?  Supposedly special machining process to provide a really quiet gear.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
       •Thread Starter
     

    2/14/2020 9:38 PM  #18

    Hornman
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    Re: Putting new 9” housing and axles in the 66

    MS wrote:

    Has anyone tried the new US GEAR STEALTH SERIES gears? Supposedly special machining process to provide a really quiet gear.

    You mean all gear makers don’t try to make their gears as quiet as possible? How would they ever get any repeat business?

     

    2/15/2020 7:52 AM  #19

    Rudi
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    Re: Putting new 9” housing and axles in the 66

    REM ring and gear polishing. $150.00

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    2/15/2020 10:53 AM  #20

    MS
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    From: Canyon Lake, Texas
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    Re: Putting new 9” housing and axles in the 66

    Rudi, can you elaborate?

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
       •Thread Starter
     

    2/15/2020 11:03 AM  #21

    Bullet Bob
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    Re: Putting new 9” housing and axles in the 66

    My used 8.8 gears are quiet as a mouse blowing bubbles in a feather bed....and I didn't pay some ham-fist to set them up.   Dun it myownself.

    Just sayin'.

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    2/15/2020 11:52 AM  #22

    Rudi
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    Re: Putting new 9” housing and axles in the 66

    MS wrote:

    Rudi, can you elaborate?

     It's an isotrophic polishing method for gears.
    vacmotorsports.com
    innovatorswest.com
     Another one uses electricity to micro plish, don't know if they do individuals though,
    https://www.ableelectropolishing.com/cases/1023-machined-steel-gear-needing-surface-improvement-for-noise-reduction/

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

     

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