Proud of my Rear End

Proud of my Rear End:

This weekend, I finally received the part I needed to finish the rebuild of my rear end.  This has been the most challenging of things so far, mainly due to getting the right parts and torqueing the pinion nut to compress the crush sleeve.  Since this is a 1964 corvette, this was a transition year for the rear end and the parts seem to be a mystery to the parts people...mainly Corvette Central (Corvettecentral.com).  



64 Corvette code CE (4.11:1 Gears)

Changed out the side shaves for u-joints with caps

 
Apparently, GM changed from a 17 spline pinion shaft to a 31 tooth spline some time between '64 & '65.  The 17 tooth spline was used on older corvettes (solid axle) but must have had a different dust shield.  So, when you order this yoke, they sell the 17 tooth configuration for '56 thru '64 even though the '63 & '64 had a different dust shield.

I had both the bearings and the pinion dust flange (came pressed on the pinion yoke) showed-up wrong regardless of what they listed on the site.  The bearings I resolved at the local parts store (box with the most dust) and the flange, I had to order a separate dust shield to get the pieces to work.  I pressed off the dust shield that came with the yoke and again pressed the new shield.

This was my first time dealing with a crush sleeve.  Let's just say my arms will be recovering for a couple days to achieve the torque required to compress the crush sleeve.  My impact gun didn't have enough torque so, I had to hang like a gorilla on the wrenches to get this thing setup. 

Now that the diff is complete, I can start to re-assemble the frame and move on with the LS swap.  This next phase will be a parts fit challenge. 


Here is the flange that came with the pinion yoke (17 tooth spline)

Carrier disassembly pictures


Old yoke and dust shield relative to the wrong shield sent on the new yoke


Here is the diff housing and other parts sent out  for powder coating

Comments

  1. PowerCouchJune 29, 2015 at 11:52 AM

    411 gears will be a lot of fun. Have you calculated your engine rpm at 70 mph?

    ReplyDelete
    Replies
    1. ACJune 29, 2015 at 6:12 PM

      As long as we don't do government math the following should be right:

      1. Distance traveled each minute:
      70 (miles / hour) * 5280 (feet / mile) / 60 (min / hour) = 6160 feet / min

      2. Distance traveled per tire revolution: (26 inch diameter tire)
      26 inch * 3.14 (PI) / 12 (inch / foot) = 6.8 feet / rotation

      3. Angular velocity of the tire (revolution per minute)
      6160 (feet / min) / 6.8 (feet / rotation) = 906 rpm

      4. Crank Speed: (Diff ratio = 4.11:1, Trans OD gear = 0.68:1)
      906 (rpm) * 4.11 (diff) * 0.68 (trans) = 2532 rpm

      The trans is a TKO 600 which is a 5 speed to help with the 4.11 gears. I would prefer another ratio (say 3.5:1) but 4:11 was in the car from the factory.

      Delete

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