OP
Gear Pattern Check
- Thread starter macleanflood
- Start date
So, you were using a .024 shim and dropped to a .020 shim? Where is your BL? Are you torquing the caps to spec before checking BL?
Are you putting pressure on the carrier when doing a pattern check?
Are you putting pressure on the carrier when doing a pattern check?
...and crickets.
...and my guess is more crickets.
Mac already told us he has it all figured out - hard to help someone with that frame of mind.
OP
BL is 7. Left shim is 15 and right is 20.
I've run the pinon down to .14 and it really falls off.
IMHO .25 gave me best results...so I'm curious what you think about .20.
Thanks!
Mac
that flat bottom says deep. enlarged it's hard to tell if it's down in the root, but it's an odd sharp swipe line. lotta goop on there.
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My guess is you're doing something wrong again. The asshole in the BFH Garage asked if your bearings are pressed on all the way, including your pinion bearing...
And this is exactly my point with the crickets comment, Mac. A bunch of us have asked questions to help guide us to figure out what you are doing wrong in order to help you, but you routinely do not answer.
You have been asked if your bearings are pressed in properly.
You have been asked if you have torqued your bearing cap bolts before checking your backlash.
You have been asked if you are putting pressure on your carrier while you are taking your pattern.
You have been asked how you verified your axle is straight after that god-awful truss install.
You have demonstrated over and over that you are trying, but you don't have a good grasp on what you are doing.
Nothing wrong with asking if you do not understand something. I do it all the time.
A great example is my asking if you checked if your axle is straight. Your response was "It's Straight!!!" When I asked how you measured it, you did not respond. I know you likely have no idea how to actually check it, and that would have been a great time to respond "I don't know how to do that, can you explain?" And I would have happily done so.
I can't speak for the others trying to help you out here, but this is trying my patience.
OP
Yup...pressed on all the way...I have a video or two of me pressing it on if you'd like to see it.
I have run patterns from no shim all the way to 30 thou in 3-5 increments.
My guess is if I am doing something wrong it's not having enough shims on the carrier bearings. Both diffs fall out. If I pack more shims in I just crawl to zero backlash.
Thanks again for the insight and help!
Here's where I am at with the Dana 35 in the rear.
OP
Let me answer these questions. I believe I answered all of them...but this forum is long and the answers are spread out.
Yes...the bearings are pressed in all the way. I have video and would be happy to post it to YouTube if you'd like to see. No, originally they were not pressed in all the way. I have remediated that (and pressed on, excuse the pun.)
Axle is straight. I put a straight edge against the face of the differential and used calipers to measure along the tubes on both sides.
I appreciate the exasperation and am trying to answer all your questions.
Thanks!
Mac
You need to fix this. Without preload on the bearings there is no chance in hell of getting a correct setup. IF you think your backlash is close only add shim to the carrier bearing opposite of the ring gear to add preload. The carrier needs to require decent effort to install if the preload is close.
I have never touched an axle with so little shims on the carrier. Usually 3-4x what you have.
OP
And I have not fully torqued the carrier bearings...been putting them at around 30 ft/lbs.
I have been setting the pinion between 18 and 20 inch/pounds.
I did mix down the bearing paint with axle oil.
I am running a pattern using a drill and a leather glove in the manner proscribed by BFH garage. I have done 5 rotations at times instead of 3.
-Mac
I have been setting the pinion between 18 and 20 inch/pounds.
I did mix down the bearing paint with axle oil.
I am running a pattern using a drill and a leather glove in the manner proscribed by BFH garage. I have done 5 rotations at times instead of 3.
-Mac
Seems that BFH guy wants to help but really wants know about that silly bearing press thing. What a dick
Nope. That's not how it's done. But you will never know, because you will never ask.
You need to have enough shim thickness in place so the diff doesn't fall out, and then a few more. packing shims in randomly doesn't work. If your backlash is zero, then take some from the left side and add them to the right side until backlash is there. Putting shims on the right side moves the ring gear away from the pinion gear. If you tell me you have no shims on the left side, then you are doing something wrong.
You never mentioned....were there any really thick shims on either side of the carrier when you first took it out (in addition to what was under the bearings)?
It should have to be bumped in and then once you have all this done then you add more to each side b4 final assembly to get it real tight.
So I just re-read this entire thread and felt left hanging. What happened with this/these setups?
@macleanflood
@macleanflood