Am I getting close? Backlash is currently at .007". These are new yukon gears on a Detroit Locker for my 2002 TJ, replacing a 3.07 Dana 35. Axle is out of an 01 tj. Thanks in advance for any suggestions.
Dana 44 4.10 gear pattern check
- Thread starter 68lemans462
- Start date
OK next try added 004 to pinion depth which is all I had shims for. Time to order more for this one too.
@hosejockey61 The top pictures were different I changed the backlash between those pairs of pictures.
@hosejockey61 The top pictures were different I changed the backlash between those pairs of pictures.
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OK, next try. Still too deep?
I re-measured all my shims with my mechanical starrett calipers and realized my digital caliper was off.. Anyways I tried a couple more patterns this one is .024" lower than the previous pictures. Also have more shims on the way dangit are those hard to find.
I re-measured all my shims with my mechanical starrett calipers and realized my digital caliper was off.. Anyways I tried a couple more patterns this one is .024" lower than the previous pictures. Also have more shims on the way dangit are those hard to find.
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OK, I got some more pinion shims which allowed me to try some more variations.
I have tried many variations, trying to get patterns like the BFH video shows. I have now removed all the shims (.0280). The only "shim" I'm using is the oil slinger under the pinion bearing which is .0300. At this stage I cannot go lower without removing the oil slinger.
Where do I go from here?
I have tried many variations, trying to get patterns like the BFH video shows. I have now removed all the shims (.0280). The only "shim" I'm using is the oil slinger under the pinion bearing which is .0300. At this stage I cannot go lower without removing the oil slinger.
Where do I go from here?
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What's your backlash currently with that pattern?
That's with your carrier bearing caps installed on the right sides and orientations and correctly torqued to spec?
Are you using setup bearings?
-Mac
That's with your carrier bearing caps installed on the right sides and orientations and correctly torqued to spec?
Are you using setup bearings?
-Mac
Welcome to gears 101.
That's the risk of installing the original shim underneath the pinion head. It should be close. Real close in fact. It doesn't leave you a lot of room to work with. If you have a clamshell bearing puller, then it isn't an issue. But if you don't, then you're screwed.
So just to be clear, you had the original shim back between the bearing and pinion head and then you added another 28 thou behind the inner race? That's why it was so deep the first set of pics. Now your coast side looks slightly shallow and your drive side looks slightly deep. Add more pressure to the ring gear as you are spinning it to try and define a better pattern. I would also wipe some of the excess paint off so it doesn't build up at the root so much. Re-run the same setup- less paint and more pressure and then repost a pic.
Using setup bearings and pos Chinese clamshell pullers. First one failed on the second bearing!
I started out with the original shim which was .062" and it was too thick. I then ordered a Spicer piece that was .030" and added addl shims under the inner race. I obviously started too high. As I like to say sometimes I have to pay for an education!
I just came out and checked the backlash and it looks like it is a little loose .011" so that probably explains why one side is a little low and the other little high. I will dial it in in the morning and take better patterns. It's fun to figure this stuff out. Thanks!
I started out with the original shim which was .062" and it was too thick. I then ordered a Spicer piece that was .030" and added addl shims under the inner race. I obviously started too high. As I like to say sometimes I have to pay for an education!
I just came out and checked the backlash and it looks like it is a little loose .011" so that probably explains why one side is a little low and the other little high. I will dial it in in the morning and take better patterns. It's fun to figure this stuff out. Thanks!
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Depending on where you are in the Denver area, I have a box full of shims and slingers.
OK couldnt resist another try and adjusted backlash to 009. I'm liking these adjustments!
I'm in Lakewood near 170 and young field at the bottom of the hill.
That does look a lot better, but I would say you are still 1-3 thou shallow. See if you can make a shim combination in that range.
So, ADD 1-3 thou and re-run.
So, ADD 1-3 thou and re-run.
I've got a 4 thou shim, that's the smallest increment I can move it. I'll try it and post one more pattern.
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Can you make/use a combination of shims that will allow you to make the 1-3 thou change? So if you have a 12 thou shim in the stack, but you change it out for a 10 thou, that effectively removes only 2 thou.
I hear you. Right now I have NO shims in place aside from the .030" oil slinger and my smallest shim is .004" so I'm stuck with that.
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