Spring 2010 Repairs

  • dissassemble rear-end due to clutch slippage
  • found leaky wheel cylinders, muddied everything up, must replace
  • 742 case, 10 spline yoke with 7290 u-joint, Dana Power Lok Sure grip, 4.30 gears
  • axle bearings likely replaced in '02 at dealership, new Green bearing non-adjust type set

Compression test (PSI), 5 cranks

Cylinder With Plugs Without Plugs Plug Resistance (Ohms)
1 120 130 6.5K
2 120 140 5K
3 110 5.2K
4 120 7K
5 130 5K
6 120 5.6K
7 120 150
8 120 130 6.5K

Wire resistance measurements - Expecting 800 Ohms/ft, 67 Ohms/inch
Length (inches) Resistance (Ohms) Ohms/inch Within Spec?
41 2.4K 59 Yes
54 2.3K 43 Yes
33 1.1K 33 Yes
27 2.4K 89 No - Fixed
32 1.5K 46 Yes
39 2.7K 69 No - Fixed
34 2.3K 68 No - Fixed
20 1K 50 Yes
8 1.23K 154 No - Fixed

Disassembly

  • clutches completely gone!

Re-assembly

  • New parts : 3.91 Yukon ring & Pinion, diff kit, Moroso yoke girdles
  • Drill out & polish OEM yoke


Calculations

Testing fitting

  • Measuring original setup to test calculations
  • Re-installing original ring & pinion settup

Final Re-Assembly

  • Installed yukon 3.90 ring, new clutch pack, new bearings & seals
  • Yukon pinion turned out to be defective, returned it

Final Re-Assembly, part2

  • Exchanged for a richmond set, continued installation
  • Wear pattern very good:
    • Pinion height spec is 2.762", my height came to 2.766". Ie 0.004" shorter.
    • Pinion preload spec is 10-20inch/lb, mine came to be ~18"



Timing Chain replacement

  • Excessive slop in my timing chain, must be replaced
  • Why the fuck is my cam off by 180 degrees!?!?!?

Other Mopar timing chain setups :

Finally some explanations

Moparfest 2010