1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

4x4 conversion ?'s

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Ericm40, Mar 19, 2012.

  1. Mar 19, 2012 at 3:33 PM
    #1
    Ericm40

    Ericm40 [OP] Active Member

    Joined:
    Jan 5, 2012
    Member:
    #70016
    Messages:
    28
    Gender:
    Male
    First Name:
    Eric
    Duluth, GA
    Vehicle:
    86 Chevy C10
    TC LCA Tabs
    Ok, so forget about the cost. I'm not selling my prerunner. I'm damned and determined to not have another car payment, so it's one is staying. That being said I have read the other threads here and on other sites regarding this topic. My question is why isn't this as simple as leaving out the electronics?

    So I get a manual fj transfer case, front diff, cv's, ect. I don't want to get into the electronics. Ball park price of $4500 for parts and labor. Will everything mount up correctly? Do the prerunner and 4x4 have the same mounting positions?

    I'd love to o an SAS, but that's double the price and I'm not opening that can of worms.

    Thanks,

    Eric
     
  2. Mar 19, 2012 at 4:01 PM
    #2
    BulletToothTony

    BulletToothTony Space for rent

    Joined:
    Feb 20, 2008
    Member:
    #4833
    Messages:
    12,898
    First Name:
    You can call me Susan if it makes you happy.
  3. Mar 19, 2012 at 4:03 PM
    #3
    Ericm40

    Ericm40 [OP] Active Member

    Joined:
    Jan 5, 2012
    Member:
    #70016
    Messages:
    28
    Gender:
    Male
    First Name:
    Eric
    Duluth, GA
    Vehicle:
    86 Chevy C10
    TC LCA Tabs
    No way to bypass the ADD? Seems like manual t-case would solve the issue, unless I'm missing a major unseen step.
     
  4. Mar 19, 2012 at 4:06 PM
    #4
    nut

    nut she'll ride

    Joined:
    Nov 6, 2011
    Member:
    #66555
    Messages:
    1,613
    Gender:
    Male
    First Name:
    Patrick
    Currently Richmond, VA
    Vehicle:
    Totaled
    TRD SKEWP DCSB 4x4 Silver Mica | URD TCAI/MAF CAL | BHLM | GrillCraft | FF Sliders | LED's All Around | 12v Constant On | EGR In Channel | 15% Tint | Trimmed mud flaps | Fog Light Anytime Mod | Debadged | Tailgate Hoseclamp | DTRL Switch | Disabled Lock Beep/Seatbelt Chime | Husky Liners | HID's | BedRug | WO Seat Covers | ABS Kill Switch | Oil Catch Can | Viper 5704 | Custom Carbon Cabin Filter | Backup Camera Anytime | 400W Anytime | In Cab Outlet W/USB | Firestone Ride Rites | Ams Oil All Around | 32" LED In Lower Grill | BlackVue DR500GW-HD |
    holy poo :popcorn:


    good luck OP! sub'd for interesting reading
     
  5. Mar 19, 2012 at 4:08 PM
    #5
    tacoman15

    tacoman15 Boobies

    Joined:
    Aug 19, 2011
    Member:
    #62001
    Messages:
    3,569
    Gender:
    Male
    First Name:
    Chris
    Northeast Georgia
    Vehicle:
    2015 Tacoma TRD OR & 1985 SR5 4Runner
    Without taking it out, no I don't believe so.
     
  6. Mar 19, 2012 at 4:21 PM
    #6
    97yota4wd

    97yota4wd Well-Known Member

    Joined:
    Aug 26, 2010
    Member:
    #42280
    Messages:
    12,955
    Gender:
    Male
    First Name:
    Eric
    Mesa, AZ
    Vehicle:
    alot of metal, small engine, decent travel.
    caged, camburg long travel, 50t leafpack (soon to be installed) light rack over cab, 5pt harnesses etc
    i have only heard of it being possible on first gens..... i just havent seen anyone try it on a second gen either. everyone says it cant be done on a second gen
     
  7. Mar 19, 2012 at 4:24 PM
    #7
    Davtopgun

    Davtopgun Weeeee mod time!

    Joined:
    Feb 17, 2011
    Member:
    #51350
    Messages:
    3,984
    Gender:
    Male
    First Name:
    David
    Central Alabama
    Vehicle:
    2014 TRD Off-Road
    TacoAlaMode Custom grill, SCS Gunmetal F5's, Treadwright guard dogs, OME 3" Lift w/OME Dakars. LRUCA's. Allpro off-road plate rear bumper with high clearance hitch, SOS concepts bolt on rock sliders with top plate, Pelfreybuilt front plate bumper, rci skid plates.
    I've looked into this, also. If you're intent on doing it, you should just do a SAS 4x4 conversion. Cost will be high, but it's less of a headache.
     
  8. Mar 19, 2012 at 4:25 PM
    #8
    AllMountainToy

    AllMountainToy Well-Known Member

    Joined:
    Aug 23, 2011
    Member:
    #62194
    Messages:
    417
    Gender:
    Male
    Northern California
    Vehicle:
    2011 Tacoma Double Cab 4X4 TRDOR
    2 3/4 OME Suspension Lift with 885, with trim packer, 1/4" top plate spacer, swaybar relo bracket. Dakar leaf pack with 3rd leaf removed. 285/70/17" BFG AT. XD Wheels with 4.5 BS, Best Top Soft Top, Undercover winch mount with Warn 8k winch (with synthetic line), Pioneer touchscreen double din head unit. 4X innovations welded sliders. roof mounted DVD system.ATO dual battery tray with dual yellow tops. Rugged ridge isolator kit.
    OP,are you almost at the end of your payments on your pre-runner which is why you don't want another payment?
     
  9. Mar 19, 2012 at 4:36 PM
    #9
    bjmoose

    bjmoose Bullwinkle J. Moose

    Joined:
    Aug 31, 2010
    Member:
    #42529
    Messages:
    6,000
    Gender:
    Male
    First Name:
    Steve
    San Jose CA
    Vehicle:
    '11 Std Cab 4x4 5sp
    OME suspension, ARB Air Lockers, CBI/Relentless/Pelfrey armor, HAM radio
    Answering the question that was asked:

    There are two steps to engaging the 4x4 system on a 2nd gen.

    1. The "Center Axle Disconnect" (aka "Automatic Differential Disconnect") actuator on the front differential slides a fork moving a sleeve so that the passenger side CV is now mechanically engaged with the center differential itself. This is an electrical actuation step. Power is provided to the actuator motor until the internal switch reports the sleeve is in final position, when power to the actuator motor is cut. It's not a complicated circuit, but it's more than just a switch.

    2. The transfer case engages, providing power to the front differential via the front drive shaft (propeller shaft in toyota service manual lingo.) Out of the box, this is also an electrical actuator - but this is the part you were thinking of making pure mechanical only with your FJ transfer case.

    The concept of 4x4 conversion been proven out on 1st gens. 2nd gens are getting old enough where it's going to be worth someone's while to do it eventually.

    If you're gonna get your hands dirty - go for it. Take pics and show the rest of us the way. It'll probably go best for you if you can obtain a totalled out (rolled?) 4x4 2nd gen in the driveway next to the prerunner to canabalize the parts off of as you need them.

    But the fact remains it's not cost economical to *pay* someone to do this at standard shop labor rates of 80 to 140 dollars per hour.
     
  10. Mar 19, 2012 at 4:39 PM
    #10
    bjmoose

    bjmoose Bullwinkle J. Moose

    Joined:
    Aug 31, 2010
    Member:
    #42529
    Messages:
    6,000
    Gender:
    Male
    First Name:
    Steve
    San Jose CA
    Vehicle:
    '11 Std Cab 4x4 5sp
    OME suspension, ARB Air Lockers, CBI/Relentless/Pelfrey armor, HAM radio
    What is the reason behind that? At least with the 4x4 conversion with CV axles existing factory parts for every component is available. SAS is a bunch of custom fab work.
     
  11. Mar 19, 2012 at 5:01 PM
    #11
    Ericm40

    Ericm40 [OP] Active Member

    Joined:
    Jan 5, 2012
    Member:
    #70016
    Messages:
    28
    Gender:
    Male
    First Name:
    Eric
    Duluth, GA
    Vehicle:
    86 Chevy C10
    TC LCA Tabs
    I've got a guy who is an awesome mechanic and fabricator. I trust his work and he likes to try new things. I have a few years left, but crazy low miles. It's an 07 with 28k miles. It'll be cheaper for me to convert it than to sell the truck and buy a 4x4. Plus I'm not gonna sell it when it's payed off, I'm gonna drive it till the wheels fall off.

    So how do I get around the center axel disconnect?
     
  12. Mar 19, 2012 at 5:16 PM
    #12
    bjmoose

    bjmoose Bullwinkle J. Moose

    Joined:
    Aug 31, 2010
    Member:
    #42529
    Messages:
    6,000
    Gender:
    Male
    First Name:
    Steve
    San Jose CA
    Vehicle:
    '11 Std Cab 4x4 5sp
    OME suspension, ARB Air Lockers, CBI/Relentless/Pelfrey armor, HAM radio
    Make sure you agree on a flat amount ahead of time, not an open ended "by the hour" rate.

    Behold! I give you your first challenge. :p

    You must get the pinouts on the actuator from the factor service manual, and design a small circuit. There's a specific name for this type of circuit, but it escapes me at the moment. Basically, it applies power when the switch goes on, until shut off by activation of a second "positional" switch. It's not complicated as circuits go, but it'll have a low power switched power (via a switch in the cab), obtain unswitched power from the battery, and have a pair of solenoids.

    I'm actually not sure if the disengagement is via reverse actuation, or simply that power is no longer applied to the actuator, allowing an internal spring to return the internal sleeve to the disconnected state. You'll have to find out.

    I can't lay it out for you exactly because I'm not familiar with the exact pinouts and voltages on the ADD actuator. IIIRC it has 5 wires going into it.
     
  13. Mar 19, 2012 at 5:21 PM
    #13
    Mxpatriot

    Mxpatriot Arctic Prerunner

    Joined:
    Nov 18, 2009
    Member:
    #26163
    Messages:
    3,212
    Gender:
    Male
    First Name:
    Chase
    North Pole, Alaska
    Vehicle:
    '06 4x4 AP LT and Locked
    Money pit.
    If you're too stubborn to be convinced that converting a 2WD Tacoma into a 4WD Tacoma is not worth the headache and expense over just buying a 4WD Tacoma, then at least do a solid axle swap so that you're making progress with all that money you're spending.
     
  14. Mar 19, 2012 at 5:23 PM
    #14
    Ericm40

    Ericm40 [OP] Active Member

    Joined:
    Jan 5, 2012
    Member:
    #70016
    Messages:
    28
    Gender:
    Male
    First Name:
    Eric
    Duluth, GA
    Vehicle:
    86 Chevy C10
    TC LCA Tabs
    Ok, so now that that's out of the way. Will everything from the donor truck fit right into the prerunner without major mods?
     
  15. Mar 19, 2012 at 5:31 PM
    #15
    Ericm40

    Ericm40 [OP] Active Member

    Joined:
    Jan 5, 2012
    Member:
    #70016
    Messages:
    28
    Gender:
    Male
    First Name:
    Eric
    Duluth, GA
    Vehicle:
    86 Chevy C10
    TC LCA Tabs
    I spent a year doing a complete rebuild of a 73 jeep cj5. Talking new wiring throughout the whole vehicle, drivetrain rebuild and overhaul, paint, bumper mods(they don't make plate bumpers for the 73), and much more. I don't care about a headache. It'll be a fun conversion when I do it.
     
  16. Mar 19, 2012 at 5:34 PM
    #16
    joes06tacoma

    joes06tacoma Well-Known Member

    Joined:
    Jan 1, 2010
    Member:
    #28588
    Messages:
    3,056
    Gender:
    Male
    First Name:
    Joe
    Central Coast, CA
    Vehicle:
    06 4x4 Off Road Access Cab v6 6spd
    LEER Shell with dome lights operated with 3 way switches, aux backup lights with relay and 3 position switch, modified wiring to compass/temp display and clock to include switch that disables dimming function (poor man's DRL solution), Scan Gauge 2
    Stock FJ also has ADD. An FJ transfercase will have switches on it that are used to activate the ADD on the FJ. There are writeups on here where guys have swapped FJ cases into stock 4x4 2nd gen trucks. Try searching for "2lo" mod. I know it came up during that discussion.

    It should be quite a bit simpler if you go with the manual shift case. I don't know if the FJ case bolts to the Taco trans without mods. That info should be available if you search around a little more.

    If I was to embark on this conversion, then only thing that I would really want to know is how the front diff mounts up, and whether the stock Taco 4x4 driveshafts will work with the FJ case.
     
  17. Mar 19, 2012 at 5:36 PM
    #17
    Ericm40

    Ericm40 [OP] Active Member

    Joined:
    Jan 5, 2012
    Member:
    #70016
    Messages:
    28
    Gender:
    Male
    First Name:
    Eric
    Duluth, GA
    Vehicle:
    86 Chevy C10
    TC LCA Tabs
    What he said
     
  18. Mar 19, 2012 at 5:38 PM
    #18
    worthywads

    worthywads Well-Known Member

    Joined:
    Jun 25, 2011
    Member:
    #58841
    Messages:
    4,139
    Gender:
    Male
    Peoples Republic of Boulder
    Vehicle:
    05 5-lug access I4 Stick, 70 Challenger Vert
    Sell 2wd +$4500 = 4wd with no payments.
     
  19. Mar 19, 2012 at 5:38 PM
    #19
    joes06tacoma

    joes06tacoma Well-Known Member

    Joined:
    Jan 1, 2010
    Member:
    #28588
    Messages:
    3,056
    Gender:
    Male
    First Name:
    Joe
    Central Coast, CA
    Vehicle:
    06 4x4 Off Road Access Cab v6 6spd
    LEER Shell with dome lights operated with 3 way switches, aux backup lights with relay and 3 position switch, modified wiring to compass/temp display and clock to include switch that disables dimming function (poor man's DRL solution), Scan Gauge 2
  20. Mar 19, 2012 at 5:40 PM
    #20
    joes06tacoma

    joes06tacoma Well-Known Member

    Joined:
    Jan 1, 2010
    Member:
    #28588
    Messages:
    3,056
    Gender:
    Male
    First Name:
    Joe
    Central Coast, CA
    Vehicle:
    06 4x4 Off Road Access Cab v6 6spd
    LEER Shell with dome lights operated with 3 way switches, aux backup lights with relay and 3 position switch, modified wiring to compass/temp display and clock to include switch that disables dimming function (poor man's DRL solution), Scan Gauge 2
    NO!!! Don't talk him out of it. He's done big mods before. I want to see the pics!!
     
To Top