The typical pinion shim kit should give you enough of a variety of thicknesses to be to make the combination that you need. What dos your new pattern look like,and what shims are in there now?
God, Just can not believe you need that much shim. looks like you will need .075... I have a bunch more shims if you need PM me your address. How sharp is the edge of the ring and pinion teeth. There has got to be more to this ... ? Weird... Jim All the 8.2 gears i set up are usually .030 -.020 If I get around .040 in a 8.2 I am really scratching my head. BUT if you say your .050 oof and the other combo is .012 subtract that ad it to the orignal shim and see what you get for a start. .038 + original shim .032 = .070 Jim
also open the backlash up to .010 too for a used gear that has been in there for years. trying to find this pattern where ever it might be...
Sorry I dont think I made myself clear. I now have timken bearing that's nearly identical to OEM, so I'm good there. Factory shim is .032 and is producing nearly the correct pattern w this setup. I just need to be at about .034 or .035, but the shim pack won't produce that thickness in any combination. So I'm looking for pinion shims that are .001 or .002 to add to the factory shim to get there. I'll give u a ring tomorrow Jim. Thanks.
I have 20's,and 14's,15's. I have an assortment of 11's & 12's,so the combination of 3 of those would get you there. It's odd that your kit doesn't have that.
Your going to be hard pressed to find .001 .002 shim just does not get done like that you need a .017 and .018 or combo. As stated I can send them to you as long as you PM me your address again. If that is my kit. I know some of those kits can have limited shimming. I have a WALL full of them and extra pinion new packs. But I would personally grab the numbers you would need to finish the job. Jim
Ya it's a Nitro Gear brand and only came with pinion shims of 20, 26 and 38. Not useful. Carrier shim variety was quite limited too. Anyway Jim's gonna fix me up. Hopefully I'll be posting final pattern this weekend.
Well after getting useful pinion shims and many, many hours in the shop this is the best pattern I can come up with Its not perfect but its gonna have to do. Nothing I do will get the patterns to climb the tooth, and at least these are centered crown to root. The USA Gear instructions I have say this is an acceptable pattern. I'll do final assembly and install crush sleeve tomorrow. Hopefully the pattern holds. For any other noobs considering a freshening up of your rear end, definitely think twice. In hindsight I should have just run mine with all the original parts (all of which looked good) and hoped for the best.
I think you will be ok... It is used... The swipe looks like it could work a ok... Jim I like to see more teeth around the whole gear too for any problems i might see with the run out too. Can never have enough compound laying around to check the pattern.
The pattern examples in that USA Gear booklet are also for new gears. What did you end up with for backlash,and what was it before you took it apart?
BAcklash readings are on the picture. It is very hard to help with out being present at the site of the job. There are tons of variables and factors like preloads of the carrier and pinion - shims measuring and torque calibration on instruments etc. It is not horrible might be a bit hard on the initial pinion to ring toe contact point as stated we did not have a pattern from when the gear was removed either. Anytime we remove a gear we throw a pattern to see the condition of the rear that is getting a re-bearing job. That pattern will definitely run and not tear it self apart.
Backlash was .0115 before I took it apart, so I've tightened it up by a thousandth. Like Jim said I should have also run a pattern before disassembly...would have helped to know what both sides looked like. I do know the bottom of the drive side pattern is in the exact same place as this pic I took before disassembly shows: You can see where the pattern was worn in at the bottom of the tooth.
Ok so if the original set-up was .011 you are about all you can do as the gear was left in too long at that compromised backlash out of spec for too long. YOU work it back in over time if you keep working it back on the backlash over time. It will take some diligence I can see the gear face heat marks where it was running and you are about where you should be. Jim
Thanks Jim. Was heading out to the shop last Sunday to do final assembly when the septic tank backed up into the house. I now know a lot more about plumbing uzzled: I'm planning to put everything together on Friday...I'll post pics of final pattern.
OH CRAP.... THAT STINKS.... We are now getting assessed for our septic systems. They ALWAYS fine a way to get more money out of the working class folks... Just another hand in the pocket.
