I've install lots of gears over the years and I've never seen a new gear with a wear pattern already worn on it.
Sorry for my assumption.
Sorry for my assumption.
Gear setup 8.5 "
- Thread starter Albertaborn
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They were new from a private guy. I'm 100 % they are new. From the threads on the pinion to the the threads holes in the ring , not a single scratch from any fasteners. Im sure I sound like a rookie but I assure I'm not. Just want some good feedback about setting gears as its not something I do alot. I own 6 concrete boom trucks that I do all mechanical work on from head gaskets to rear end ( mind you with rears I just buy a new pumpkin all set up)
Yes matching numbers. Should I check if it has a full tank of gas? Sorry but it seems like everyone has alot of suggestions but no actual setup recommendation.
I haven't had a chance to try any other shim options out since work had been crazy. Just hoping someone can shed some light on a good recommendation to save me some time.
Regal you were the only one so far who has given me some solid advice. I do thank you and appreciate it. I will be trying to pull some out of the pinion. I did ask a local gear shop and they wanted 8 hrs at 110 an hr. Brutal. I've setup a 8.8 out of an f 150 and it turn out great just a few tweaks. For some reason Im lost for a starting point other than just pointlessly changing shims till I get something I want. I don't want to just go ahead and re shim the pinion though I'd like to know why. I like to learn and have rebuilt prob 2 dozen 2 stroke and a dozen 4 stroke and even resleeved one of my mack trucks and it has 10000 hrs now. I'm kinda a I don't buy parts or make big changes till I have a smoking gun.
Thanks. Setting ring and pinion is a tedious process, that is why I recommended pinion setup bearings. It could take 3 or 4 or more tries to get the pinion shimmed where it needs to be depending on how far off the pattern is initially. You can move in small amounts to arrive at where you need to be or take a giant leap and over shoot the mark and have to back up. My .003" recommendation is not a lot in the grand scheme of things, but it is when setting up a ring and pinion.
When you have the time try what I said and post back what the pattern is and we'll go from there.
When you have the time try what I said and post back what the pattern is and we'll go from there.
Thanks for your patience Regal. I just pulled the pinion apart again but the sub part shim kit I got has the lamest set of sizes I have even seen for something that is supposed to have some variety. I think I'll have to wait till Monday to pick up another kit cause I can't for the life of me get a combination that would be close to .0035. I did manage to pull the bearing off without incident but for what it's worth I'll pick up another for the final setup and I'll slightly hone the current one out to use as a setup.
FWIW, Regal is spot on with his description/suggestions in terms of using a setup bearing, leaving out the crush sleeve, and this can be a tedious process.
I'll add a couple of items to make this go easier. Take an old pinion nut and grind or cut off the top (locking) section so that it can be easily removed multiple times without scarring the pinion's threads. Do all gear pattern setup without the crush sleeve (ALWAYS) and without the pinion seal installed.
You might already be aware of this but I thought it is worth mentioning that your carrier preload (side to side) should be at zero. This is found via setting it up within .003-.006 of clearance (via dial indicator) and then adding/adjusting carrier shims for however much clearance you have.Don't preload the carrier bearings beyond .001-.002" or you'll be at this again.
IMHO, the best way to complete this process is with a pad of paper and right down each attempt's results and recording the exact shims and locations at each point. Presently your pinion has too much shim. As Regal mentioned, take out .003" and recheck, and repeat as many times as necessary until you see the pattern identify that the pinion is too shallow (not enough pinion shim), and then go back to the previous shim amount. Regal mentioned 3-4 times in out and this is tedious. TAKE YOUR TIME (not yelling, but rather emphasizing) and don't be scared to put it together and take it apart as many times as needed - the worst time I've ever had was with a pinion that had to be cut at the inner bearing to be used in a different housing (thank you to GM's H-body housing) - I had that pinion in and out a dozen times before I got it correct - it took me a good 8 hrs to get it completed.
Good uck - Jim
I'll add a couple of items to make this go easier. Take an old pinion nut and grind or cut off the top (locking) section so that it can be easily removed multiple times without scarring the pinion's threads. Do all gear pattern setup without the crush sleeve (ALWAYS) and without the pinion seal installed.
You might already be aware of this but I thought it is worth mentioning that your carrier preload (side to side) should be at zero. This is found via setting it up within .003-.006 of clearance (via dial indicator) and then adding/adjusting carrier shims for however much clearance you have.Don't preload the carrier bearings beyond .001-.002" or you'll be at this again.
IMHO, the best way to complete this process is with a pad of paper and right down each attempt's results and recording the exact shims and locations at each point. Presently your pinion has too much shim. As Regal mentioned, take out .003" and recheck, and repeat as many times as necessary until you see the pattern identify that the pinion is too shallow (not enough pinion shim), and then go back to the previous shim amount. Regal mentioned 3-4 times in out and this is tedious. TAKE YOUR TIME (not yelling, but rather emphasizing) and don't be scared to put it together and take it apart as many times as needed - the worst time I've ever had was with a pinion that had to be cut at the inner bearing to be used in a different housing (thank you to GM's H-body housing) - I had that pinion in and out a dozen times before I got it correct - it took me a good 8 hrs to get it completed.
Good uck - Jim
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