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Old 03-26-2007, 03:47 PM
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shims and the ring pinion?

hey guys,
im putting to gether a differential for the first time and am wondering... where do i place the shims??? under the tail bearing (place the shim on the shaft first then press the tail bearing ontop of it) or on top of it (press the tail bearing on then the shims go on top of that). the second way makes more sence because if i put on the wrong shim and then press the bearing on top of it.... its on for good.

anyways i have a 489 case for a dodge challenger, so yea my stuffs chrysler just so you know what type of application i have becasue i think ford has different ways of doing things as im sure all of the car companies do.

so if anyone can help me clarify som things up.... thanks!

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Old 03-26-2007, 06:17 PM
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The shim has to go on the pinion first then the bearing on top. If you have an old bearing you can grind out the center a bit so you can slip the bearing on and off buy hand. and once you get the right set up install the new bearing. It will save you lots of time and hassle.

Hope this makes sence to you.
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Old 03-27-2007, 01:37 AM
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if i cant do that how do i set it up, know which shim to use, with out pressing the gear on. does one just choos the thinest (or thickest) shim then press the bearing on and if more shims are needed place them on tiop of the bearing?
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Old 03-29-2007, 12:23 AM
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A simple option is to grind the ID of your old pinion bearing (or a new one if you have the cash) so it will just slide over the pinion. Then you use that bearing to set it up with and press on the other bearing last.
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Old 03-30-2007, 09:10 AM
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Quote:
Originally Posted by Arillious
if i cant do that how do i set it up, know which shim to use, with out pressing the gear on. does one just choos the thinest (or thickest) shim then press the bearing on and if more shims are needed place them on tiop of the bearing?
The only way to know which shim is the right one is to trial fit them until you find the correct one. This is why it is being suggested that you hog out an old bearing...

Do a search on this board for setting up a diff..there is some good info to be had.
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Old 03-30-2007, 09:30 AM
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Quote:
Originally Posted by Lonestar
The only way to know which shim is the right one is to trial fit them until you find the correct one. This is why it is being suggested that you hog out an old bearing...

Do a search on this board for setting up a diff..there is some good info to be had.
The quickest way is to use a pinion depth guage. Call some shops see if they have one...then take them your case and have them measure it.
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Old 03-30-2007, 10:15 AM
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does the pinion depth gauge have the big magnet on one side and theres two adjustable bars attached to it? also has a dial indicater that can be attached to the the end of it?
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Old 03-30-2007, 11:52 AM
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Quote:
Originally Posted by 61 chevy
The quickest way is to use a pinion depth guage. Call some shops see if they have one...then take them your case and have them measure it.
Doesn't that still require pressing the bearing on at least 2 times?

Quote:
Originally Posted by Arillious
does the pinion depth gauge have the big magnet on one side and theres two adjustable bars attached to it? also has a dial indicater that can be attached to the the end of it?
No. That is just the magnetic base for your dial indicator. Here is a pinion depth tool. Most of them do come with a dial indicator.
http://completeoffroad.com/wsm/i-63_...epth_tool.html

The other option if you don't have your own press and are going to have to take the pinion to a shop and have the bearings pressed on/off is to try out ratech's relocated pinion shims. I have never tried them or seen anyone try them...but they should work the way you want them to.
http://www.ratechmfg.com/sdpinshims.htm
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Old 03-30-2007, 12:31 PM
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aaah ok thanks thanks for all the info guys really appretiate the help
now its time to try and incorperate it wish me luck its my first time!

Last edited by Arillious; 03-30-2007 at 12:56 PM.
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Old 03-30-2007, 03:22 PM
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Quote:
Originally Posted by Triaged
Doesn't that still require pressing the bearing on at least 2 times?
No...you install the race, bearing and a 1-2-3 block in the housing and measure...Take the difference of the pinion thickness vs 1-2-3 block, figure in the setting depth..and wallaa....required shim dimension.
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