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  1. Mechanic421

    New bee from river park fl.

    Yes I set the tree down before the hurricane hit last year. And totaled that Denali last September! Have replaced it with 06 twin same everything! Swapped most of my parts to the 06. This weekend I am doing energy suspension bushings and had my welding buddy box the lower control arms. The front...
  2. Mechanic421

    Spark plugs

    Replace them all now,then you won’t have to deal with it for a while. They are not that hard to replace,looks worse then they really are.
  3. Mechanic421

    A Word To The Wise When Doing Spark Plugs

    I use long needle nose pliers against the manifold to pry off the plug wires.
  4. Mechanic421

    transfer case

    Be more specific. Do you want to remove the transfer case,front axle housing or just don’t engage four wheel drive? But if you get a two wheel drive transmission yes or buy a two wheel drive out put shaft and tail housing and have it installed in your transmission.
  5. Mechanic421

    New transmission, now getting P1870

    Were do you live I work at a transmission shop in ft Pierce fl
  6. Mechanic421

    New transmission, now getting P1870

    Good luck
  7. Mechanic421

    New transmission, now getting P1870

    A And replacing the valve body is not all that hard but they are not cheap. You just can’t put the long bolts in the wrong place it will lockup the gear train!
  8. Mechanic421

    New transmission, now getting P1870

    If you google 4l60e harsh 1-2 shift and code p1870 there are some websites with some good information.
  9. Mechanic421

    Front diff driver axle seal

    Clean it really well and drive it for a few miles , then recheck it . If all else fails put dye in it and use a black light to find the leak. Did you check the axle for a groove or any scaring.
  10. Mechanic421

    New transmission, now getting P1870

    Take it to a professional for diagnostics and then go from there. Could be a number issues line pressure, tcc solenoid , tcc valve or maybe pressure control solenoid.
  11. Mechanic421

    Front diff driver axle seal

    Probably needs bearings!
  12. Mechanic421

    Getting ready to get a tune.

    Are you guys loading 87-89 oct? I have not loaded my 91 oct yet! What kind of difference between the tones have you noticed? I would load my 91 but adapts are just now sorted and don’t feel like feeling my transmission slide bump again.
  13. Mechanic421

    Mystery wire lounging on valve cover

    Temperature sensor ,pretty much like that.
  14. Mechanic421

    06 yukon denali electrical issue

    Try to find a wiring diagram and unplug any components on that circuit. If that works start plugging them back in until you find the one that is shorted. If that does not work you will need to track the wiring until you find the shorted wire.
  15. Mechanic421

    Remanufactured Jasper NP241 or let local shop rebuild?

    I am not a jasper fan I just have to replace the seals on my low mileage transfer case that they just rebuild!
  16. Mechanic421

    Be careful jacking up your AWD

    Guys always block tires when jacking up your vehicles no matter 2wd/4wd/awd and jack stands also ,most of these jack are made in China only a rubber seal holding the weight!!!!!
  17. Mechanic421

    Transmission

    I would recommend sonnax smart shell.
  18. Mechanic421

    I can't believe I have to post this question, but...

    People with fords should be banned from this forum!
  19. Mechanic421

    Transmission

    Yes time for a rebuild.
  20. Mechanic421

    Sonnax heavy duty and circle d 4l65e

    So happy dance my first transmission build and I was nervous, but works well and adapts still learning. I think tuning would make it even better. I am thinking emission legal cam before Tuning would be best.
  21. Mechanic421

    Sonnax heavy duty and circle d 4l65e

    About to install my 4l65e with sonnax heavy duty upgrades and circle d 2200-2400 stall converter in my 06 Denali xl
  22. Mechanic421

    Torsion key question

    Look at your rebound bumper on upper controlarm if they are close I would lower the right side a half inch. If not close yes turn up left side. If it’s hard to turn jack up on frame to make it easier to turn. If you really want to get trick put weights in drivers seat to adjust ride height. And...
  23. Mechanic421

    Denali Issues

    Actually Ford is a four letter word the should be banned on this site!
  24. Mechanic421

    need a tune

  25. Mechanic421

    need a tune

    I have an 06 denali xl and looking for a good tuner for a custom tune. Please don’t reply with black bear they are to hard to get on the phone and like to communicate primary by emails! Has any one used Nelson’s with any luck?

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