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Perez620

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About Perez620

  • Rank
    Member

Profile Information

  • Gender
    Not Telling
  • Location
    Kansas City, KS
  • Cars
    '74 620. Originally L18/3spd converting to L20B/5spd
  • Interests
    Auto restoration

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226 profile views
  1. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Makes sense. Seems like this speedo pinion is a real issue across the 620’s. I’ve seen a few different things on Ratsun
  2. Perez620

    Center Bearing replacment question

    Source for the rubber isolator?
  3. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Great! Thanks. Appreciate the help as always Now to find that speedo pinion
  4. Perez620

    Center Bearing replacment question

    Mind if I ask where you got your new carrier bearing? looking to replace mine soon
  5. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Received the 4.11 today and seems to be in decent shape. A few questions though for this future trans swap.. Original diff to the truck is a 4.625 and now have a 4.11 I will be installing. Will the driveshaft still mate up properly to the new 4.11? Looks like it will but figured I'd ask.. Also, since I originally had a 3 spd auto and going to a 5 speed, will I still be able to use the original driveshaft?
  6. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Pulled them both back out and both are 3” on the dot
  7. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Btw just checked and both my 4 speeds have 20 teeth red speedo pinion gears. My 3 spd auto has 21 teeth violet
  8. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Ran a few numbers on a GRC with 3 different rpm's just to give me an idea of a few cruising speeds. Figured I'd put them together and post them 5 speed transmission - wide vs mid ratio gear ratio’s calculated 4.11 rear end Tire Height - 25.5 WIDE 3000rpm 3500rpm 4000rpm Ratio MPH MPH MPH 3.592 15.42 17.99 20.55 2.246 24.65 28.76 32.87 1.415 39.13 45.66 52.18 1.00 55.37 64.6 73.83 .882 62.78 73.25 83.71 MID 3000rpm 3500rpm 4000rpm Ratio MPH MPH MPH 3.321 16.67 19.45 22.23 2.077 26.66 31.1 35.55 1.308 42.33 49.39 56.45 1.000 55.37 64.6 73.83 0.864 64.09 74.77 85.45
  9. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Great thanks for the info Mike. Yeah my truck originally had an auto w/L18. I bought the truck apart so now I’m rebuilding a L20B from a buddy and trying to find a 5 spd to pair up with the 4.11 I just bought So I don’t know if the speedometer was reading correctly since it wasn’t running
  10. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    No idea. I currently don’t have a 5 speed but I’m searching for one. I do on the other hand have two four speeds now. Not sure on those either I’d have to check. I was just wondering, aside from the pinion gear subject, what ratio you would prefer with a L20B and a 4.11 rear? Wide or Mid. Wanna find what’s going to best suit the rear end
  11. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Mike, with my setup I'm going for.. L20B w/4.11 rear and future 5 spd.. Whats the real difference between the wide geared trans and a mid with my setup? I know earlier in the thread you made note of the difference between the actual change with a higher/lower ratio rear end. I'm just wondering as far as comfortable driving around town and highway cruising. I'm just wondering because I may have a '79 wide ratio 5 spd I could purchase but you mentioned it'd be best with a mid ratio most likely with my setup Also, what are the ratio's of a wide FS5W71B? You stated a mid-ratio is 3.321.. 2.077..1.308.. 1.000.. 0.864 and rev 3.382 so I already know those
  12. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    Interesting. I'll have to do some research and see what I'm going to need for my setup. In the mean time I need to get my hands on a 5 spd
  13. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    My plan is to put in the 4.11 I just purchased. I’ll obviously wait to get a 5 spd to put the proper speedo pinion in. I wonder if a 4spd and 5spd speedo pinion will interchange if needing one for the same rear
  14. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    It’s currently on its way to me now. They didn’t have a speedo pinion so I’ll have to find one but that’s not a huge necessity I guess He said wouldn’t be over $50 for shipping possibly less. Found it in Nebraska and I’m in Kansas so got lucky there
  15. Perez620

    Heres yet another 620 4 to 5 speed trans question..

    I’ll have to check and see if they have one but I doubt they do. Gato? Have a source or link?
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