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Rear Pto Driveshaft Length

Discussion in 'Early CJ5 and CJ6 Tech' started by garage gnome, Feb 24, 2019.

  1. garage gnome

    garage gnome ECJ5 welder

    Does anyone know or have a rear pto driveshaft to measure the length of? The one I’m putting in my ‘56 is about 3” too short. It has a spicer single stick pto and the rear gearbox.
     
  2. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Can you cut it and weld a sleeve to extend it? You could test it in place before doing the final weld.
     
  3. garage gnome

    garage gnome ECJ5 welder

    Yes that’s what I will be doing, but I just would like to know the measurement. The ends have a little bit of movement, but not much. If it had a slip joint like a regular driveshaft, no problem. The pto driveshaft ends maybe move in and out 3/4 to 1”. Not too much wiggle room. They also are a joint like on a steering box with those square sliders in the two grooves.
     
  4. Glenn

    Glenn Kinda grumpy old man Staff Member

    I can't help with the length, but I am wondering if the difference between a flat fender and the CJ-5 the reason for the driveshaft being too short?
     
    Jrobz23 and cadwelder like this.
  5. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    My thought also. Makes installation easier, too.

    I bet a drive-line shop could make up a slip joint for not too much money.
     
    Jrobz23 likes this.
  6. garage gnome

    garage gnome ECJ5 welder

    My thought too, but I think the rear drive shaft (transmission to axle) is the same length between the two of them, right?
     
  7. Glenn

    Glenn Kinda grumpy old man Staff Member

    1" wheel base difference so I'm not sure without measuring.
     
  8. cadwelder

    cadwelder Member

    My measurements show a 5's rear crossmember is 3" farther behind the rear axle than one on a flatty.
     
    Glenn and garage gnome like this.
  9. GTS Dean

    GTS Dean New Member

    I measured 50.75" flange-flange on my '64 CJ5
     
    garage gnome likes this.
  10. Rralphs

    Rralphs Old Member

    PTO-Shaft.jpg
    Mine measures just under 47". I've never had it installed and figured I'd have to shorten it since I changed to a t19 and added an overdrive.
     
  11. garage gnome

    garage gnome ECJ5 welder

    Probably the same as what mine is then.
     
  12. garage gnome

    garage gnome ECJ5 welder

    My driveshaft measured 48”. I cut it and machined up sleeve for it out of 1-1/2” pipe.

    [​IMG]
     
  13. SIDSCJ

    SIDSCJ Jeep addict

    I took an original rear PTO off my '56.
    Single stick PTO, with 540rpm rear gear box.
    You're missing a part.........
    PM me your phone # and I'll send you pics.
     
  14. nickmil

    nickmil In mothballs.

    The stock CJ-5 rear pto shaft is roughly 3” longer than a Flatfender unit. Assuming you have a Spicer 18H rear output pto unit.
    The rear frame
    Length on a CJ5 is approximately 3” longer than a 2A or 3A.
     
    garage gnome likes this.
  15. garage gnome

    garage gnome ECJ5 welder

    Got these pictures from @SIDSCJ It is a solid steel or cast iron spacer.

    [​IMG]

    [​IMG]
     
  16. SIDSCJ

    SIDSCJ Jeep addict

    That spacer lived between the end of the shaft, and the flange on the input shaft of the PTO gearbox.
    Nut end of the bolts were tucked up in the crossmember, facing rearward.
    Had to cut the nuts off to remove it.
    Was original to my '56, took it off as the shaft was bent and gearbox bearing were bad also.
    Makes a good a paperweight.......