Re: Dana 60 ??
[Re: Stanton]
#3068681
08/16/22 10:40 PM
08/16/22 10:40 PM
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Joined: Jan 2003
Posts: 1,908 Nebraska
4406bbl
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,908
Nebraska
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Why is a spreader needed to get the sure-grip out of a dana ? Can the area needing the clearance not be ground ? I haven't dug into this yet so don't know the how's or why's. The case spread sets the bearing preload, you can get worn bearings out with big prybars and beat it back in with deadblow hammers.. new bearings will need a spreader for the most part to do it right.
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Re: Dana 60 ??
[Re: fourgearsavoy]
#3068702
08/16/22 11:58 PM
08/16/22 11:58 PM
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Joined: Aug 2003
Posts: 43,185 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,185
Bend,OR USA
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Done a couple dozen gear swaps over the years and never used a spreader and never had an issue. A spreader would make life easier for sure in place of pry bars and a deadblow hammer. I made some set-up bearings years ago and it makes the job much easier. Spreaders are pretty cheap now on Ebay and Amazon Gus I don't use a case spreader, never have, never will I remove the center section by using a pry bar gently to work it out a little at a time and then remove the bearing and shims with a bearing puller , I made some set up bearing like Gus uses and use them to set up the new gears and get the preload and back lash correct and then either press on the old bearing with the new shim stack or with the new bearings and races if their getting changed out with the new shims . I'll use enough shims to get zero preload with no ring gear on the center section and then add another .012 to .015 additional shims for preload depending on which works the best i use a plastic or leather mallet to tap in the center section, very carefully
Last edited by Cab_Burge; 08/17/22 03:59 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Dana 60 ??
[Re: Stanton]
#3068729
08/17/22 06:06 AM
08/17/22 06:06 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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When I removed the 4.10:1 ratio gears someone put in for the correct 3.54:1 gears, I noticed that the right bearing housing was missing a chip out of it. Someone really forced the carrier into (or out of) the housing. It was in so tight that even with a spreader it was hard to remove. The carrier bearings were a bit discolored too from too much pre-load. I did the setup bearings too, but they just get you close, once the real bearings are pressed on, it adds to the pre-load. Same with the pinion height, need to set it slightly low with the setup bearings so when the pressed on bearing expands the pinion come up to the correct height. The pinion pre-load needs to be shimmed for the correct turning torque when there is at least 250 ft/lbs torque on the pinion nut, so you need a yoke holder and large torque wrench. A dial type in/lb torque wrench works good for measuring the pre-load. Because the housing was slightly damaged where the carrier was forced in, I replaced the cap bolts with ARP studs too. I used the carrier shims that go between the carrier and bearing. The clamshell style bearing puller works good to remove the bearings without damaging them. On the pinion, I used the large diameter type shim between the case and bearing race for pinion height. Pretty easy to have over $1,000 in tools to do a differential.
Last edited by 451Mopar; 08/17/22 06:09 AM.
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Re: Dana 60 ??
[Re: TJP]
#3068843
08/17/22 11:38 AM
08/17/22 11:38 AM
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Joined: Oct 2005
Posts: 8,872 Ontario, Canada
Stanton
OP
Don't question me!
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OP
Don't question me!
Joined: Oct 2005
Posts: 8,872
Ontario, Canada
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that low mileage may have been a 1/4 mile at a time May be but not with the current 3.54's - which were swapped in for the 4.10's I'm not worried about weakening from welds. I'll put it up on Marketplace and test the waters.
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Re: Dana 60 ??
[Re: 4406bbl]
#3068861
08/17/22 12:33 PM
08/17/22 12:33 PM
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Joined: Dec 2005
Posts: 11,570 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,570
Fulton County, PA
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I have a case spreader. Have used it a few times, over the years, to disassemble units that had never been apart from new. I have never put one back together so tight that I had to use a spreader.
Last edited by CMcAllister; 08/17/22 12:33 PM.
If the results don't match the theory, change the theory.
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Re: Dana 60 ??
[Re: TJP]
#3068918
08/17/22 04:07 PM
08/17/22 04:07 PM
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Joined: Aug 2003
Posts: 43,185 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,185
Bend,OR USA
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I bent an 8 3/4 housing really badly drag racing it with ladder bars and coil overs, bad enough that I had to pound the 35 splines axles in with a BFH and a block of wood: tsk: It finally broke the welds off of the ladder bar mounts off of housing forcing me to see the bent right axle tube with it on jackstands: puke: I replaced it with a cut down Dana 60 housing out of a pickup, I use two carpenter squares and a tape measure with the help of my wife to measure 15 inches out from the axle centers both forward and backwards to check for the housing being bent. That check can be done on jackstands also so you can measure all four ways, up, down, front and back of the housing :twocents
Last edited by Cab_Burge; 08/18/22 10:32 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Dana 60 ??
[Re: Stanton]
#3068929
08/17/22 04:34 PM
08/17/22 04:34 PM
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Joined: Jan 2003
Posts: 75,012 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,012
U.S.S.A.
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Well let me explain the dilemma then ...
Bought a very nice complete low milage '69 b-body dana at Carlisle. At some point it had some sort of traction bar (maybe ladder bars) mounts attached so there is evidence of the welds but nothing serious.
Plan A would be to seal up the breather, remove the brake parts and give it a very light sandblasting and prime and paint
Plan B would be complete disassembly and then narrow it a few inches.
Plan C sell it and buy a custom unit I would go with plan C especially if it's got the right numbers and dates for an A12 car, you should be able to get enough to buy an S60 setup as you want . Otherwise if it's really low miles and not ugly inside plan A will be fine. I bought one of the Ebay spreaders, you only need to spread it no more than .020 ... per service manual ... or you risk damaging the housing ... yes you can pry it out and it back in but where is the metal burrs you are raising up going as you it back in ?
running up my post count some more .
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Re: Dana 60 ??
[Re: Stanton]
#3069463
08/19/22 10:04 AM
08/19/22 10:04 AM
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Joined: Jan 2003
Posts: 75,012 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,012
U.S.S.A.
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Can someone decipher these numbers for me please ...
There should be more numbers in that area . , the BOM will start with a 6 , possibly there is a second date code. That rear is too early for an A12 .
running up my post count some more .
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