HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech


Reply
 
Thread Tools Display Modes
Old 08-08-2016, 11:49 PM   #1
Ed Carpenter
Live Reporter
 
Ed Carpenter's Avatar
 
Join Date: May 2006
Location: Dripping Springs, Tx
Posts: 2,697
Likes: 185
Liked 502 Times in 125 Posts
Default Dana 60 question

I have a Dana 60 with a 6.17 pro gear. 3 years ago it was completely rebuilt new strange spool, new MW pro ring and pinion, new caps,.bearings the works. This unit has 27 runs on it. My car has sat since July 2013. We are about (well my son is) to put this thing back together. In turning the rear end it has a hard spot as you turn it. Then it turns nice and free then tightens up for a seconds then does it again. Same spot each time? What might this be? Thanks for any input. Ed
__________________
Ed Carpenter
2005 Chevy Cobalt A/SM
Race Engine Development
Ed Carpenter is offline   Reply With Quote
Old 08-09-2016, 07:57 AM   #2
Mike Pearson
VIP Member
 
Mike Pearson's Avatar
 
Join Date: Mar 2007
Posts: 2,366
Likes: 553
Liked 1,636 Times in 506 Posts
Default Re: Dana 60 question

Hi Ed.

Did you have your chassis guy put a brace on the housing when you took it to him last time? There is probably a bad tooth on either the pinion or ring gear. Pull the cover and look for cracks. The gears wont last very long if the clutch is set with too much pressure. The 617 has a very small pinion and not very durable. When I ran a stick in my car many years ago I was only able to get 50 runs max from my Dana w/ 617 gear but that was before the good clutches and clutchless gearboxes that are available today. Good luck getting the car back out and running. I hope your back gets better so you can get back to driving soon.
__________________
Mike Pearson 2485 SS
Mike Pearson is offline   Reply With Quote
Old 08-09-2016, 08:15 AM   #3
Ed Carpenter
Live Reporter
 
Ed Carpenter's Avatar
 
Join Date: May 2006
Location: Dripping Springs, Tx
Posts: 2,697
Likes: 185
Liked 502 Times in 125 Posts
Default Re: Dana 60 question

Mike no brace but I put a LPW cover on it with the pads that tighten up against the caps. I will have my son check the ring and pinion. Would like to put a 9" in there but no money for that. My son will have to drive for awhile my back is along ways off from me driving
thanks for input.
__________________
Ed Carpenter
2005 Chevy Cobalt A/SM
Race Engine Development
Ed Carpenter is offline   Reply With Quote
Old 08-09-2016, 09:42 AM   #4
Mike Taylor 3601
VIP Member
 
Mike Taylor 3601's Avatar
 
Join Date: Oct 2008
Location: Somerset,Ky
Posts: 1,303
Likes: 198
Liked 116 Times in 48 Posts
Default Re: Dana 60 question

Head of pinion bent,most likely.
Will be tight one spot and loose when you turn pinion 1/2 turn.
Had 12 bolt in 6.1? 1/8 mi.stick car bent pinion about every 35-50 runs,with 300LBS. base and no counterweight on pressure plate.
Mike Taylor 3601
Mike Taylor 3601 is offline   Reply With Quote
Old 08-09-2016, 09:52 AM   #5
Paul Precht
Senior Member
 
Paul Precht's Avatar
 
Join Date: Dec 2001
Location: Elysburg, Pa
Posts: 689
Likes: 279
Liked 223 Times in 88 Posts
Default Re: Dana 60 question

Did you look at it closely, it may have a bit of rust built up in the tight spot.
Paul Precht is online now   Reply With Quote
Old 08-09-2016, 10:05 AM   #6
Mike Pearson
VIP Member
 
Mike Pearson's Avatar
 
Join Date: Mar 2007
Posts: 2,366
Likes: 553
Liked 1,636 Times in 506 Posts
Default Re: Dana 60 question

Quote:
Originally Posted by Ed Carpenter View Post
Mike no brace but I put a LPW cover on it with the pads that tighten up against the caps. I will have my son check the ring and pinion. Would like to put a 9" in there but no money for that. My son will have to drive for awhile my back is along ways off from me driving
thanks for input.
Sorry to hear that your back is still giving you grief.
If you pull the gear out check the ends of the axle tubes where the races for the spool bearings push against and see if you see any wear on that surface. That will give you an indication if the housing is spreading when you launch the car. If you see some wear and grooving there add the brace. I think you can add that to the LPW cover that you already had. At some point we probably wont be able to get any gears for the dana's. They already only make a few ratios for them.
__________________
Mike Pearson 2485 SS
Mike Pearson is offline   Reply With Quote
Old 08-09-2016, 11:34 AM   #7
Dave Casey
VIP Member
 
Join Date: Dec 2002
Location: Hampden, MA
Posts: 1,150
Likes: 196
Liked 579 Times in 126 Posts
Default Re: Dana 60 question

the lash was probably set a little on the tight side initially and often times they tighten up some, mainly, I think because the teeth bend very slightly when they get run. Pull the cover and check the lash in a few spots, then reshim it a touch looser and run it. Pinion is pretty small on those, and we are not babying these things.

just my experience in the past
__________________
Dave Casey 1330 STK
Dave Casey is offline   Reply With Quote
Old 08-09-2016, 02:38 PM   #8
Ed Carpenter
Live Reporter
 
Ed Carpenter's Avatar
 
Join Date: May 2006
Location: Dripping Springs, Tx
Posts: 2,697
Likes: 185
Liked 502 Times in 125 Posts
Default Re: Dana 60 question

Thanks for all the input. We will pull cover and check it out....hope to test this thing pretty soon...
__________________
Ed Carpenter
2005 Chevy Cobalt A/SM
Race Engine Development
Ed Carpenter is offline   Reply With Quote
Old 08-09-2016, 04:35 PM   #9
Mark Yacavone
Veteran Member
 
Mark Yacavone's Avatar
 
Join Date: Mar 2002
Location: Miles From Nowhere
Posts: 7,392
Likes: 2,563
Liked 4,418 Times in 1,683 Posts
Default Re: Dana 60 question

Ed, Check the backlash right before the tight spot, right after it, and then again, 180 degrees away from it. You might have a couple thou runout on the spool.
Maybe rotate the ring gear on the spool?
Wouldn't surprise me . As Dave says, we're not babying these things.
__________________
We are lucky we don't get as much Government as we pay for..... Will Rogers
Mark Yacavone is offline   Reply With Quote
Old 08-12-2016, 10:30 PM   #10
Frank Bialas
Member
 
Frank Bialas's Avatar
 
Join Date: Sep 2007
Location: NJ
Posts: 248
Likes: 2
Liked 19 Times in 12 Posts
Default Re: Dana 60 question

Quote:
Originally Posted by Mike Pearson View Post
At some point we probably wont be able to get any gears for the dana's. They already only make a few ratios for them.
Your right, looking for NEW 5:13
__________________
Frank Bialas 1570 STK
Frank Bialas is offline   Reply With Quote
Reply


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 08:38 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.