When installing 4.30s

Discussion in 'Drivetrain' started by 98svtcontour98, Feb 3, 2016.

  1. 98svtcontour98

    98svtcontour98 New Member

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    What else do I need to "upgrade" when doing gears? What is the preferred method of correcting the mileage?

    Thanks,

    Mike
     
  2. lwarrior1016

    lwarrior1016 Moderator Staff SN95 Supporter

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    Well, I always say when you do the gears to do all the bearing and the trac-lok at the same time. Order the FULL overhaul kit from someone like american muscle and you shouldnt have a problem. Youll need a few special tools if you didnt know that already. Ive found the best way to correct the speedo is by getting a speed cal.
     
  3. lutter94

    lutter94 Well-Known Member

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    speed cal ftw!
     
  4. 98svtcontour98

    98svtcontour98 New Member

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    great thanks!

    What is a speed cal? lol and does American Muscle sell that as well?
     
  5. lutter94

    lutter94 Well-Known Member

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    http://www.americanmuscle.com/ford-speedo-tool-9410.html

    you have X mph coming into the box, and whatever you dial it to, will adjust the speed based on %. set it to 100, it won't change it. set it to 050, it will read half, 200 is double, etc. You can do math, set it, verify gps, tweak it etc.

    I wired mine into the trans harness at the firewall, and velcro'd it to the firewall itself. easy to pop the hood, take the cover off and change the dials. you change tire size, anything, this will correct it.
     
  6. lwarrior1016

    lwarrior1016 Moderator Staff SN95 Supporter

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    ^Thats the one I use also. Its very simple install and has great directions with it.
     
  7. g36 monkey

    g36 monkey Moderator Staff SN95 Supporter

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    Speed cal.

    I always suggest getting a girdle if you can swing it and rebuilding the t-lok
     
  8. 98svtcontour98

    98svtcontour98 New Member

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    What is a girdle (and where can I buy one), and what do I need for rebuilt the t-lok (and where can I buy those parts)?
     
  9. 98svtcontour98

    98svtcontour98 New Member

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  10. lutter94

    lutter94 Well-Known Member

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    Most call it a cover...

    [​IMG]
     
  11. 98svtcontour98

    98svtcontour98 New Member

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    What's the benefit to upgrading the diff cover?
     
  12. evilcw311

    evilcw311 Most Evil Mod! Staff Member Staff

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    Stronger and some have more fins for cooling the fluid


    This message courtesy of crapatalk!
     
  13. lutter94

    lutter94 Well-Known Member

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    Also, the drain/fill ports are nice. I wish I had one, but I always find other things higher on the list to buy...lol


    I feel its better to jack up on this, than the stock cover potentially bending it, leaking fluid on the ground....
     
  14. g36 monkey

    g36 monkey Moderator Staff SN95 Supporter

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    Motive gears tend to have an issue with whining.

    A girdle is studded which makes it a fair amount stronger, plus, as mentioned, it has a drain hole and fill hole so if you want to service the fluid you can without having to crack the seal which is really nice.
     
  15. 98svtcontour98

    98svtcontour98 New Member

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    Thanks everyone!!!

    What about doing upper and lower rear control arms...is it "worth" it to upgrade those?
     
  16. lutter94

    lutter94 Well-Known Member

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    Maximum Motorsports doesn't recommend stiffer upper control arms, just better bushings. As for lowers, it seems like a lot of people find stiffer units being a large improvement.
     
  17. 98svtcontour98

    98svtcontour98 New Member

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    Is there another brand that does not have these concerns?
     
  18. Witzy0070

    Witzy0070 Active Member

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    I run Motive gears in my Cobra and Bronco, and I have run 4.30s and 3.73s with no issues...
     
  19. g36 monkey

    g36 monkey Moderator Staff SN95 Supporter

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    Some people never have an issue, others do.

    Ford Racing is what most places recommend.
     
  20. Thomas_W

    Thomas_W Well-Known Member

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    Ive run richmonds, Ford racing, motive and a few other off brands. They are all pretty much the same, the installers attention to detail on getting the gear mesh, pinion preload, etc correct is more important.


    If you have the money and plan to take the car to a pretty wild setup in the future, i would do a ful 31/35 spline axle upgrade, c clip eliminators, girdle, locker, LCA's, shocks and UCA's

    if your just wanting to increase the fun of a daily driver

    gears w/ full axle rebuild
    girdle
    LCA's and UCA's
    shocks