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As received from Jason...V6 third with a Detroit SoftLocker and Yukon quality 529 gears. Apparently ran into a few issues that were beyond the scope of the emails that we were swapping back and forth. After about 70 miles, the rear end started making a loud whining noise. Time to pull the 3rd and lick a stamp and hurl it in ZUK's direction. |
This was the only marking on the ring gear. I've seen it before and they do set well. |
Pre-inspection....this is a little unusual...too much thread is showing |
I discreetly marked the adjusters with the dremel grinder to do a comparison at the end of this link. |
I measured the backlash at 3~4 thou.....a bit tight. I also noted that there appeared to at least be some carrier bearing pre-load. Thumbs up. |
The pinion turned extremely "rough" like it had a bad case of the chatters. |
When I pulled the pinion, I noticed the solid collar was not seated all the way down. The screwdriver is pointing to the nearly 100 thou gap. The collar was tightly wedged.... I had to press it off with the big pinion bearing to release it. |
The trick to removing the monster bearing without damaging it....is to use a modified bearing separator (lotsa grinding to the half-dishes) and apply pressure while using the free hand to spin the cage. If it locks up, release the pressure and do something different. I have not lost a cage yet. |
I placed a different V6 collar I had on the pinion to see the maximum it would slide on and marked it. |
...then the one that Jason had on there.....it would not slide all the way down. Something was interfering.... |
Close inspection of the collar revealed some hammer damage. I used a curved file and now the collar slides on nicely. |
Then I found that the outer pinion bearing was the wrong one.
Part number Timken 30306 made in Poland....designed for 79~85 4 cylinder 3rds.
30306 on left and a V6 version on right.
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After a couple of tries, .050" worth of shims gave a nice 12 in/lb of pinion pre-load. |
While turning the pinion by hand and tapping on the bearing here.... |
It will be found that the adjuster wheel can be tighten up some more.... then repeat the "tap-tap" procedure about 3 more times before everything finds its "set". |
I applied some marking paint on 3 teeth (both sides) and used a wrench on one of the ring gear bolts to move the ring gear assembly back and forth. |
This is with .008" backlash and the pattern looks fine. Pinion shim used here is .082". |
coast .082" good. |
This is the final settings for the adjusters...this is on the ring gear side and actually ended up quite close to where Jason had his adjustment. |
But on the 'non-ring gear' side I have noticably more 'pre-load'. This is one of the SINGLE most important adjustments to maximize ring/pinion strength....strong carrier bearing pre-load. |
With the right small pinion bearing, everything looks much better here... only about 1 thread is showing which is about right. I did not dimple the nut because I have a solid collar with 200 pounds of torque and blue-loctite. |
Not only has this 3rd been 'repaired' but strength has been maximized. Done. |
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