I know you want to get this DONE but I think I would wait until you can get some different shims from GM. I'd like to see it more centered but that is just me.
Adding the shim behind the pinion gear solved that issue - I can get any measurement I want now with the shims I have. On my second pattern I went way deep - 5 thou deeper than it is now, and I was definitely hitting the bottom of the tooth. But, the pattern was still toward the heel on the drive side, and toward the toe on the coast side. That's been consistent no matter what I've done.I know you want to get this DONE but I think I would wait until you can get some different shims from GM. I'd like to see it more centered but that is just me.
Adding the shim behind the pinion gear solved that issue - I can get any measurement I want now with the shims I have. On my second pattern I went way deep - 5 thou deeper than it is now, and I was definitely hitting the bottom of the tooth. But, the pattern was still toward the heel on the drive side, and toward the toe on the coast side. That's been consistent no matter what I've done.
Is that what you mean by more centered?
That’s the exact document I have been using. Right now I split the difference between the drive side pattern being toward the heel, and the coast side pattern being toward the toe, just like the center right picture. In both cases the pattern softens up a lot (easier to see in person) as they get toward either edge.
Quite a bit. They want the gear OD at 10.063".The entire time I was thinking why not just add the difference between the pinion head and bearing. But having zero experience with 14 bolts or 9" for that matter I wasn't sure what you could get away with. That last pattern does look good.
When they shave the ring gear how much do they take off?
Setting up a 14 bolt or 9" is child's play. I would take either over a Dana 30 or Dana 44 any day.The entire time I was thinking why not just add the difference between the pinion head and bearing. But having zero experience with 14 bolts or 9" for that matter I wasn't sure what you could get away with. That last pattern does look good.
When they shave the ring gear how much do they take off?
ECGS cuts it to 10.005. So a little less than a quarter inch. It needs every bit - the ring only clears the bottom of the shaved case by about a sixteenth.Quite a bit. They want the gear OD at 10.063".
Oh yeah, definitely the case.The adjustable side bearings and pinion support shims make it a breeze!
That’s the exact document I have been using. Right now I split the difference between the drive side pattern being toward the heel, and the coast side pattern being toward the toe, just like the center right picture. In both cases the pattern softens up a lot (easier to see in person) as they get toward either edge.
Finally, when I tightened everything down for the last time the backlash was at 10 - so I left it there based on previous comments.
Thanks again for all the help. Time to button it up and continue to get it under the rig.
9 inch is definetly the diff to learn on as not only does it not require pulling bearings, you can have it on the bench and actually see what you have going on.Setting up a 14 bolt or 9" is child's play. I would take either over a Dana 30 or Dana 44 any day.
You can have the 14 bolt on the bench too, it just takes a little more effort...9 inch is definetly the diff to learn on as not only does it not require pulling bearings, you can have it on the bench and actually see what you have going on.
you mean a lot of effort. They weigh a ton.You can have the 14 bolt on the bench too, it just takes a little more effort...