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finding out what diff you have

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  • #31
    Do the Jzx90-110 diff internals fit into the F-series diffs or only the G-series? I assume F-Series 7.5" means the ring gear is 7.5"?

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    • #32
      Damn, that means a GZ20 with 1G GTE auto has a 4.556 diff, that means cruising on the highway is high RPM bonanza, just like many 80s econoboxes. How sad.

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      • #33
        Originally posted by alcyon View Post
        Damn, that means a GZ20 with 1G GTE auto has a 4.556 diff, that means cruising on the highway is high RPM bonanza, just like many 80s econoboxes. How sad.
        Worse when you convert your Auto GZ20 to a manual. My Highway RPM was far better as an auto then it is with a W58.... ended up changing my diff to a 3.7 from an MA70
        JZZ31 GZ20

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        • #34
          Originally posted by Leon View Post
          Worse when you convert your Auto GZ20 to a manual. My Highway RPM was far better as an auto then it is with a W58.... ended up changing my diff to a 3.7 from an MA70
          I did an rpm to mph calculation yesterday, and i was wrong, its actually slightly better than 80s econobox, owing to its 205/65/R15 tyres that give a 25.5" diameter, so the 4.556 with a final gear of 0.705 isnt too bad.
          Yes with the W58 the last ratio is 0.851 so for sure it will rev higher.

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          • #35
            i was looking for this, this is really usefull thanks man

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