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Project Killer B - 1988 BJ73

Discussion in '70-Series Tech' started by bjowett, Jun 19, 2017.

  1. bjowett

    bjowett Supporting Vendor

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    Ward, you have parts skills... very important.

    This parts fiche pic shows the transmission adapter unbolted from the block.

    IMG_1327.PNG
     
  2. GLTHFJ60

    GLTHFJ60 Rum Runnin' SILVER Star

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    The detachable flywheel housing design is also used on Cummins. I wonder if you could adapt a Cummins flywheel housing to work on that motor, would be faster than making one from scratch :hmm:
     
  3. bjowett

    bjowett Supporting Vendor

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    If using the H55F or RC60F series transmissions, the extra depth that is provided by the flywheel housing probably won't be beneficial for keeping mounts where they currently exist. The chances of any of the housings bolting to the W04C block are low, but one never knows! I appreciate the idea!
     
  4. GLTHFJ60

    GLTHFJ60 Rum Runnin' SILVER Star

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    The flywheel housing does not necessarily add to drivetrain length. The flywheel is still bolted directly to the crank and the bellhousing is made shallower so that the distance between the rear of the block and the front of the transmission is the same as a bellhousing-only design.

    Seems that you don't like the idea of cutting up a bellhousing for either of those two transmissions, so you're thinking you'll make a custom flat plate adapter, like the OM617 engines, to bolt to your H55/RC60F bellhousing to the engine?
     
  5. bjowett

    bjowett Supporting Vendor

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    Yes, I would rather not cut the bellhousing... a nice bolt in solution to connect the W04C to either transmission is definetly preferred. So creating a plate is the way to go, IMO. I can then offer the parts, even if the demand is low, to other folks that are interested in this swap.
     
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  6. GLTHFJ60

    GLTHFJ60 Rum Runnin' SILVER Star

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    Gotcha, that changes things quite a bit, favoring fewer custom parts.

    Looking forward to seeing what you come up with!
     
  7. bjowett

    bjowett Supporting Vendor

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    The buzzsaws have arrived... General Grabber X3 in the 33/10.5R15 size. I like the tread pattern on these... a good blend of old and new. Tread width is just under 8.25". These will go on high positive offset IFS 15 x 6" steel wheels.

    IMG_1329.JPG

    IMG_1332.JPG

    IMG_1333.JPG
     
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  8. Behemoth60

    Behemoth60

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    IMG_0511.JPG IMO, 33's are too small for a 70. Here's a pic of one of my BJ74's on 36's (9.00R16) with just 2" lift springs. No spacers, no offset wheels and No rubbing. I believe MR Toyoda built these wheel openings for 35's.
     
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  9. bjowett

    bjowett Supporting Vendor

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    I tend to agree, but at this point in the build, my truck just does not require that large of a diameter tire.
     
  10. bjowett

    bjowett Supporting Vendor

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    Oh, and I'm using the high positive offset to push the center/face of the wheel further out, this will give more room for a wider caliper, which may be required by a fatter rotor. I also like the look. IFS hubs may be used to keep the geometry and scrub proper and close to stock.
     
  11. bjowett

    bjowett Supporting Vendor

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    White 15 x 6" IFS steelies are one of my favorite wheels.

    IMG_1342.JPG
     
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  12. G-Cat

    G-Cat SILVER Star

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    ^^^^ x10
     
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  13. bjowett

    bjowett Supporting Vendor

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    It's tansmission decision time... the contenders ATM.

    H55F 21 spline input shaft, 19 output

    1st....4.843:1
    2nd....2.619:1
    3rd....1.516:1
    4th....1.000:1
    5th....0.845:1
    Rev....4.843:1

    H55F 10 spline input shaft, 19 output

    1st....4.843:1
    2nd....2.619:1
    3rd....1.516:1
    4th....1.000:1
    5th....0.845:1
    Rev....4.843:1

    RC60 21 spline input shaft, 19 output
    • First Gear: 4.784:1
    • Second Gear: 2.423:1
    • Third Gear: 1.443:1
    • Fourth Gear: 1.00:1
    • Fifth Gear: 0.777:1
    • Sixth Gear: 0.643:1
    • Reverse: 4.066:1
    RC60F 21 spline input shaft, unknown female output
    • First Gear: 4.784:1
    • Second Gear: 2.423:1
    • Third Gear: 1.443:1
    • Fourth Gear: 1.00:1
    • Fifth Gear: 0.777:1
    • Sixth Gear: 0.643:1
    • Reverse: 4.066:1
    RC62F 21 spline input shaft, unknown female output
    • First Gear: 3.982:1
    • Second Gear: 2.017:1
    • Third Gear: 1.321:1
    • Fourth Gear: 1.00:1
    • Fifth Gear: 0.848:1
    • Sixth Gear: 0.713:1
    • Reverse: 3.385:1
     
  14. GLTHFJ60

    GLTHFJ60 Rum Runnin' SILVER Star

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    RC60

    My NV4500 has a ~.75:1 5th and I wish I had another deeper overdrive.
     
  15. bjowett

    bjowett Supporting Vendor

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    Yes, the RC60 with that 0.643:1 is certainly nice for those that need it.
     
  16. swelltimes

    swelltimes SILVER Star

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    Subscribed! Looks like a great truck and a fun project!
     
  17. bjowett

    bjowett Supporting Vendor

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  18. bjowett

    bjowett Supporting Vendor

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    Finally! A home for this 9.5" axle housing that has been sitting upstairs in my carriage barn. This 2007+ Tundra small V8 and V6 rear axle is a great candidate for custom stock appearing Land Cruiser builds. The tube diameter measures 3.44", so call it a 3.5". Usable width grows by 5" per side over the long side housing on the front. So unlike an FJ60 axle, the short side length can be adjusted to suit the best location for the spring perch/diff oil pan clearance. Additionally, there's not a whole lot of bracketry to trim off. The housing is manufactured for Toyota by Hino Motor Manufacturing USA Inc. (HMMUSA). There are 7 pages of complete 9.5" Tundra axles listed on car-part.com. A single page of bare housings is also there.

    The diffs in these are only 2 pin, so best for replacement with the diff of your choice. 3.90 and 4.10 ratios have large late 100/all 200 Series 1.28" 32 spine pinion gears, shafts are 100/200 32 x 1.37. Nitro has 4.88 gears.

    IMG_1359.JPG

    IMG_1360.JPG
     
  19. beno

    beno Gihee Arakawa Moderator GOLD Star

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    so you are going from a FF to SF axle housing? Unless you have a SF right now.

    That seems counter intuitive.

    But I do know you like the Tundra stuff.
     
  20. bjowett

    bjowett Supporting Vendor

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    Apologies for being weak on the information, there will be no semi-float here. This will be for the front axle to start... and likely receive 80 Series balls, knuckles, and CVs... though I may try to squeeze some 100 Series CV joints into something.

    Diffs will probably be the latest factory Toyota 4.30 e-locker for the 100 Series, which supersedes out to the latest rear locking diff for the 200 Series. A possible cable conversion in place of the electronic actuator is a real possibility.... my first 8" cable conversion was way back in the late 90's... I've always wanted to cable convert a 9.5".
     
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