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Transmissions and Drivetrain Need help with your trans? Problems with your axle?

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Old 09-26-2009, 11:13 AM   #1
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Join Date: May 2005
Location: Southern IL
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Car: 91 firebird, 81 toy pic
Engine: 361 tpi, 2.2 diesel
Transmission: 700r4, 5speed
Axle/Gears: 3.56, ?

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cones bottoming out in 9 bolt

what should I do

buy new cones

machine old cones and shim

get a new carrier- too expensive
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Old 09-26-2009, 12:53 PM   #2
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Re: cones bottoming out in 9 bolt

The method that I have heard is to machine the end of the cone and put shims under the axle gears. I haven't done one myself, but I'm sure that the day will come when I do.
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Old 09-27-2009, 09:57 AM   #3
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Re: cones bottoming out in 9 bolt

would it hurt anything if I left the carrier alone and delt with the one wheel peel
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Old 09-27-2009, 11:59 AM   #4
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Re: cones bottoming out in 9 bolt

It won't hurt to just leave it. I've had luck filing a few thousands (.005 or so) off the ends and shimming them. It usually brings them back to life for a while. But if the inside of the cone is hitting (as opposed to the outside edge), they will need to be milled.
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Old 09-27-2009, 02:14 PM   #5
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Re: cones bottoming out in 9 bolt

so if I go with the milling and shimming how much should be taken off and how big of a shim should I use
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Old 09-27-2009, 04:15 PM   #6
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Re: cones bottoming out in 9 bolt

As the cones wear the axle gears move farther apart. This makes the gears contact farther out toward the face of the tooth instead of in the center where they are suppose to contact. This makes the gears weaker. The gears need to be shimmed so that they make contact in the correct place so that they will not break. The Borg Warner unit is stronger because it has 4 pinion gears instead of 2, like most rear ends.
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Old 09-28-2009, 01:09 PM   #7
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Re: cones bottoming out in 9 bolt

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Old 09-29-2009, 09:00 PM   #8
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Re: cones bottoming out in 9 bolt

Quote:
Originally Posted by jamon8 View Post
would it hurt anything if I left the carrier alone and delt with the one wheel peel
As biggearhead said it will hurt it if you leave it that way. There will be too much clearance on the spider gears and if you beat on it a for a bit it will break. The best bet is to machine the ends down and shim it tight again. I had to do that with a "supposedly" tight rear end. Its not that hard and i have a very tight posi again. Also, when you go to put new oil in, do not use a limited slip additive. Cone type LSDs do not need it and it will actually prematurely wear it out since the cones will be allowed to slip too much.
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Old 10-01-2009, 03:52 PM   #9
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Re: cones bottoming out in 9 bolt

ttt
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Old 10-01-2009, 04:28 PM   #10
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Re: cones bottoming out in 9 bolt

Quote:
Originally Posted by jamon8 View Post
so if I go with the milling and shimming how much should be taken off and how big of a shim should I use


Here is the pdf with everything you should need to know about setting up your 9 bolt. Also read the link above that has already been posted (the everything i know about 9 bolts link). After these two items you should be good to go.

http://www.geocities.com/luckyducky....air30Nov04.pdf
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Old 10-01-2009, 05:40 PM   #11
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Re: cones bottoming out in 9 bolt

Quote:
Originally Posted by subroc View Post
Here is the pdf with everything you should need to know about setting up your 9 bolt. Also read the link above that has already been posted (the everything i know about 9 bolts link). After these two items you should be good to go.

http://www.geocities.com/luckyducky....air30Nov04.pdf
That link doesnt work?
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Old 10-01-2009, 05:50 PM   #12
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Re: cones bottoming out in 9 bolt

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Originally Posted by InfernalVortex View Post
That link doesnt work?
Sorry. Heres the link i was trying to post. Ill edit the one above too. Its the HTML version of it. Click the link and then click the top link once your in. That way you can see the pictures as well. Otherwise its just text.

http://74.125.113.132/search?q=cache...ient=firefox-a
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