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Hovenator 12-30-2013 04:07 PM

Dana 35 gear pattern
2 Attachment(s)
Hi. I've been try to set up my 35 after I discovered the pinion nut loose. So this is for used gears.

I have shimmed the ring gear closer to the pinion in order to get the backlash down to .009

Now my pattern looks like this. I think my pinion now needs to be shimmed deeper or closer to the ring centre line.
Any expert opinions?

Attachment 625393

Attachment 625401


Nubby55 12-30-2013 09:06 PM

I'm Not An Expert, I have done this on large Gear boxes, I think, your ring gear is to close to the pinion on the drive side, but looks good on the coast side.

It's hard to get used gears set perfect, but the coast side looks good so you should be OK.

Did you have a good load on the pinion when you turned the ring gear? And did you rotate the ring gear both ways.

Hovenator 12-31-2013 12:16 PM

Thanks for responding.

Yes, I've been putting some drag on the ring gear while turning the pinion to get my patterns.

After doing some pinion shimming yesterday I kept coming up with odd patterns. Turns out that due to me putting the bearing caps on with a cordless drill and not snugging them the carrier was not fully seated. I did them up snug with a wrench and then the contact was so tight I couldn't turn the pinion. Lol.

I'll have to try some more now. I'll get it figured eventually. Good learning process though!

Nubby55 12-31-2013 09:08 PM

Hang in there the first few will make you pull your hair out, after that you'll just cuss them a lot.

Hovenator 01-01-2014 11:25 PM

Oh ya. I must have put that carrier in and pulled it back out at least a dozen times! I've now shimmed the pinion .004 deeper and have my backlash around .008. Pattern is as good as it will get. Coast is pretty centred but the drive is still towards the toe. I think that the teeth are actually worn a bit funny due to the pinion nut being loose. I'll just have to except that!

My next problem is that the PO had replaced the yoke with a u bolt style one. That's good but the stock pinion seal doesn't work with that yoke! Once I get the new seal (40544) I'll be able to put it all back together.

c5wagner 01-01-2014 11:34 PM

From the picture, it looked like you needed to increase backlash. I don't know of you were able to move shims to the non ring gear side from the ring gear side of the pinion and use the dial indicator and pattern to see how it looks. Are you using a new or used pinion bearing? The bearing preload changes between new and old bearings so you also need to know the right specs as the preload can effect backlash too.

Hovenator 01-01-2014 11:57 PM

I have been using a dial indicator. I'm pushing the upper limits of backlash.
I'm using the old bearing as it seems to be in good shape and I'm trying not to put much money into the axle as I don't like it! For set up I don't have the crush sleeve in. The inner pinion bearing race will always determine where the pinion lives.
Using it as a learning aid and hope to get an 8.8 in a while.:)

c5wagner 01-02-2014 01:45 AM

Okay, just making sure your axle won't blow up on the highway or something. For future reference, it's good practice to change the bearings out when doing work on the axle. Having the contact pattern you have will make that axle a bit noisy.

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