The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-20-2019, 04:52 PM   #1
beanious
Registered User
 
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 132
Post Gear Pattern Advice Chevy Dana 60 Front

Hello all, I'm going through and completely rebuilding the axle, seals, bearings etc. I thought I'd call on the power of the interwebs for some expert advice. I think I've finally got the gear marking pattern pretty close (.007 backlash and .027 depth shim). What ya think guys, thanks!
Attached Images
  
beanious is offline   Reply With Quote
Old 09-20-2019, 04:59 PM   #2
The Rocknrod
MCPO USN Ret.
 
The Rocknrod's Avatar
 
Join Date: Aug 2011
Location: China Spring, TX
Posts: 3,973
Re: Gear Pattern Advice Chevy Dana 60 Front

Never seen better.
The Rocknrod is offline   Reply With Quote
Old 09-20-2019, 09:53 PM   #3
sweetk30
selective wrench turner guy
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,198
Re: Gear Pattern Advice Chevy Dana 60 Front

dont forget 60 front low pinion drives on the coast side . . .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 09-20-2019, 10:50 PM   #4
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 5,778
Re: Gear Pattern Advice Chevy Dana 60 Front

Nice pattern.......... run it
kwmech is offline   Reply With Quote
Old 09-21-2019, 10:11 AM   #5
beanious
Registered User
 
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 132
Post Re: Gear Pattern Advice Chevy Dana 60 Front

Thanks for the feedback and info, the patterns are with the setup bearings. So I've hopefully only got one more disassembly, reassembly and check. Gear ratio changes are so much trial and error, can you imagine doing this on a 22 wheeler big rig? Oy!
beanious is offline   Reply With Quote
Old 10-14-2019, 10:12 PM   #6
beanious
Registered User
 
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 132
Post Re: Gear Pattern Advice Chevy Dana 60 Front

Hello all, got done changing out the Timken setup bearings for the new Timken bearings. Since they were the same brand of bearings it was pretty much the same setup, I just had to adjust the pinion preload shims a bit to get it to the sweet spot of 30 in/lbs.

I have to admit I thought the carrier pre-load was off so I changed out the shims, but after further trial and error I realized that I just didn't press the bearings all the way on the carrier. I was trying to be careful not to damage the bearings, shims, carrier, etc. I went back to the stock settings and bam, good to go. I found some videos online that help with determining preload.

Too little carrier preload:
https://www.youtube.com/watch?v=g-RyFBZWSYM

Too much carrier preload:
https://www.youtube.com/watch?v=C8bLFqSdgYI

Correct carrier preload:
https://www.youtube.com/results?sear...arrier+preload
beanious is offline   Reply With Quote
Old 10-14-2019, 10:35 PM   #7
beanious
Registered User
 
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 132
Re: Gear Pattern Advice Chevy Dana 60 Front

With the installation complete, I had a couple of thoughts that I hope will help the community and Dana 60 axle rebuilds. Take it for what it's worth...

1) The amount of time for the rebuild of my axle was 3 months, this seems a little excessive but the axle was in much worse shape than I knew, I had to travel for my job, the power went out for a week and the wife's car had issues. Long story short things come up, so plan ahead and dedicate the space and time for a long project just in case. I HIGHLY recommend a garage as if it rains on your parts, you're done.

2) The tools required are significant and add up, case spreader, 3 different torque wrenches, pipes, yoke adapter, dial indicator, heavy duty impact gun, pinion and carrier bearing removal tool, etc. That being said it's cheaper to do the work yourself and you'll be better for it but I had to buy north of 500.00 worth of tools and a good chunk of them were used Snap-On that I got at less than half price.

3) The physical wear and tear on the body is pretty decent, I only got two or three complete tear down and installs in a day. Believe me removing and installing a 50+ pound carrier over and over again is tough on your back and hands, plus the torquing and removing of the yoke and carrier caps. Everyone is different, but just saying it is a tough job.

4) The work is significantly easier if you have the axle out of the vehicle. I must have removed and installed the carrier 10+ times, with a case spreader and the axle cover pointed up I just dropped the carrier in, instead of worrying about it falling on me, or pounding it in with a hammer.

5) Use the same micrometer for measuring shims through the entire process. Even if it's the same brand they can give different readings, stick with what you start with.

6) Read the Dana 60 bible on pirate 4x4 front to back before starting, you NEED to know what you're doing before start not during or after.
http://www.billavista.com/tech/Artic...ble/index.html

7) Gear pattern is all about pressure and consistent yoke speed, I couldn't get it right by myself. So I recruited the wife to turn the yoke with a yoke tool and a piece of pipe, while I used a crowbar to apply resistance to the ring gear. The markings turned out great.

I hope this all helps!

Last edited by beanious; 10-15-2019 at 01:03 AM.
beanious is offline   Reply With Quote
Old 10-14-2019, 10:51 PM   #8
beanious
Registered User
 
Join Date: Apr 2008
Location: Sacramento, CA
Posts: 132
Re: Gear Pattern Advice Chevy Dana 60 Front

I've attached a setup sheet that I created to be able to track before and after changes for the differential. Also, there are random notes I though of as I went through the process.
Attached Images
 
beanious is offline   Reply With Quote
Old 10-15-2019, 10:51 AM   #9
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 5,778
Re: Gear Pattern Advice Chevy Dana 60 Front

Try that with a gear swap and an ARB. Got one I'm starting soon, finished welding the housing yesterday
kwmech is offline   Reply With Quote
Old 10-15-2019, 03:41 PM   #10
sweetk30
selective wrench turner guy
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,198
Re: Gear Pattern Advice Chevy Dana 60 Front

Quote:
Originally Posted by kwmech View Post
Try that with a gear swap and an ARB. Got one I'm starting soon, finished welding the housing yesterday
x2
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 10-15-2019, 04:05 PM   #11
mattfranklin
Senior Member
 
mattfranklin's Avatar
 
Join Date: Dec 2011
Location: Moraga, CA
Posts: 609
Re: Gear Pattern Advice Chevy Dana 60 Front

I'm no expert, but this reminds me of pictures I've seen in text books that say "this is what you want." :-)
__________________
(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1

http://67-72chevytrucks.com/vboard/s...d.php?t=567340
mattfranklin is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:36 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com