Jump to content

Perez620

Members
  • Content Count

    66
  • Joined

  • Last visited

Community Reputation

55 Good

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

Recent Profile Visitors

287 profile views
  1. Perez620

    In search of rebuild kit for FS5W71B (5 speed)

    Great thanks again for the help mike!
  2. Perez620

    In search of rebuild kit for FS5W71B (5 speed)

    Fantastic Mike. I actually contacted that same company Midwest trans yesterday and they were unsure which kit I needed. I suppose I’ll just tell them I need that MWT104 kit if you think that’s the correct one
  3. Perez620

    In search of rebuild kit for FS5W71B (5 speed)

    I was told there are numbers on a few of the bearings internally that will help identifying a kit. Its out of a ‘77 620
  4. Haven’t had any luck in my search online for a rebuild kit for a 71B. Seems everyone offers everything else though. Ive been in contact with two companies that deal with the 71 trans kits and both are asking me to pull the trans apart for ID numbers and measurements. If anyone has any info or internal measurements that I can share with them to help find me the correct kit it’d be much appreciated. Btw, current trans is in unknown internal condition. Will most likely rebuild it prior to installing with fresh rebuilt L20B Cheers
  5. 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
  6. Perez620

    Center Bearing replacment question

    Source for the rubber isolator?
  7. Perez620

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

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

    Center Bearing replacment question

    Mind if I ask where you got your new carrier bearing? looking to replace mine soon
  9. 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?
  10. Perez620

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

    Pulled them both back out and both are 3” on the dot
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
×

Important Information

By using this site, you agree to our Terms of Use.