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High pinion

Discussion in '80-Series Tech' started by EarthX, Aug 29, 2006.

  1. EarthX

    EarthX Owner of Earth Exploration Technologies

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    Has anyone put a high pinion fj80 front third into an fj60 front housing? Is it possible? What parts are needed? :cheers:
     
  2. -Spike-

    -Spike-

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    Hopefully you've posted this in the 60 secton too, they'd be more likely to have tried it.

    -Spike
     
  3. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    Nolo fitto. The top pinion diff is smaller, by quite a bit.
     
  4. EarthX

    EarthX Owner of Earth Exploration Technologies

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    It is posted in the 60 section as well as here. I know it is smaller but a have heard that it would still fit. Maybe just not as strong.
     
  5. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    It is so much smaller it will almost fall in the hole in the 60 housing.
     
  6. topend yobbo

    topend yobbo

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    Correct.
    60 series= big front diff.
    80 series = small front diff.
    No fittee.
     
  7. Boston Mangler

    Boston Mangler

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    No Way Jose

    As Dan Mention, you could almost stuff the entire 3rd into the hole of the rear housing.

    Why not just grind all the mounts off of your housing, flip the bitch over, weld all the mounts back on, BAM HIGH PINION, fill the bitch with oil and run it! :flipoff2:
     
  8. EarthX

    EarthX Owner of Earth Exploration Technologies

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    Is this really possible or no?:cheers:
     
  9. Boston Mangler

    Boston Mangler

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    Sure! Although i THINK you might be going backwards! :)

    Or, if the studs holding the diff are symetrical you could just flip the 3rd! (dont think they are though)

    I could sworn there was a guy on POR that has done one of these tricks on his 40. I think his name was Tyke Moses and this was awhile ago.

    I remember the only issue was oiling the pinion so he had to put extra oil in it or something like that
     
    Last edited: Aug 30, 2006
  10. -Spike-

    -Spike-

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    Might want to check on the offset- I doubt that a standard diff is offset from center by much.

    -Spike
     
  11. justdifferentials

    justdifferentials Gear & Axle parts for ALL Toyotas new or old... Supporting Vendor

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    flipping 3rd member - backwards

    if you run a 3rd member upside down it will turn backwards. The ring gear must always stay on the same side of the diff (lh when facing 3rd member. The only application that I have ever seen that uses the ring gear on the opposite side is Mercedes G-wagon front because the front driveshaft turns opposite direction of most vehicles in those. Also some people use upside down diffs in rear engine application.
     
  12. Boston Mangler

    Boston Mangler

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    What about using reverse cut gears?

    Arent different toys offered with straight or reverse?
     
  13. -Spike-

    -Spike-

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    I was under the impression that reverse cut referred to the bevel direction, for front vs. rear diffs. School me!

    -Spike
     
  14. Boston Mangler

    Boston Mangler

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    It could, i have no idea, thats why i asked! :D

    I have also heard the term reverse ROTATION as well
     
  15. -Spike-

    -Spike-

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    Hush, you, I was asking the ring and pinion guy! :D I want in on some of this gear info going around!

    -Spike
     
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