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Old 01-20-2009, 06:46 AM   #1
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Default Building Diffs

I just got my car and now have got to the part where I have to build the diffs and was wondering if it is difficult? If so what can you recommend to make it easier?

Thanks
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Old 01-20-2009, 07:01 AM   #2
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I know its a cliche, but take your time. Study everything carefully in the manual.

Once everything is into position, screw the centre bolt up a few turns, move the diff halves opposite directions, forward and back, tighten and repeat until the diff is correctly tightened.

This should even out the grease in the diff and onto the plate areas.

If the diff slips under load when you try the car, stop, and get it tightened, or it will overheat and can melt very quickly...

hope that helps
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Old 01-20-2009, 07:02 AM   #3
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No, its not hard at all. Here is a very good guide how to do it.

http://www.alexanderhagberg.com/set.htm
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Old 01-20-2009, 07:49 AM   #4
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Originally Posted by tc3team View Post
I know its a cliche, but take your time. Study everything carefully in the manual.

Once everything is into position, screw the centre bolt up a few turns, move the diff halves opposite directions, forward and back, tighten and repeat until the diff is correctly tightened.

This should even out the grease in the diff and onto the plate areas.

If the diff slips under load when you try the car, stop, and get it tightened, or it will overheat and can melt very quickly...

hope that helps
How do I know if the diff slipped?
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Old 01-20-2009, 07:54 AM   #5
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rcdude8 the loose diff will make a squaking/squeel noise under acceleration. Building diff's isn't hard but follow the words of wisdom from tc3team....."take your time.'
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Old 01-20-2009, 08:28 AM   #6
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How do I know if the diff slipped?
On exit from a slow corner or from a standing start with hard throttle application, a slipping diff will make a short sound very much like the sound a cat makes when a rocking chair accidentally squashes its tail.

Sorry, I don't have a rocking chair at the moment, or I'd post a recording...
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Old 01-20-2009, 08:55 AM   #7
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How do I know if the diff slipped?
I'm not sure if people still do this, but while I'm building them, I stick an allen in each diff half and hold those while trying to rotate the pully, if it moves it's slipping.
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Old 01-20-2009, 02:41 PM   #8
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I'm not sure if people still do this, but while I'm building them, I stick an allen in each diff half and hold those while trying to rotate the pully, if it moves it's slipping.
i do it the same way Two Tone does it but i recheck after i put it on the track and hit the throttle a cuople of times to make sure no slippage and make sure you break the diff in also
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Old 01-20-2009, 02:55 PM   #9
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I used to check that way, but the rocking chair method is more definitive and potentially more fun.
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Old 01-20-2009, 03:19 PM   #10
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Building Diffs is only difficult if you don't have any patience. There are a lot of small parts involved with a ball diff.
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Old 01-20-2009, 06:15 PM   #11
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Originally Posted by 2056dennis View Post
i do it the same way Two Tone does it but i recheck after i put it on the track and hit the throttle a cuople of times to make sure no slippage and make sure you break the diff in also
Break the diff in?
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Old 01-20-2009, 06:29 PM   #12
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If you let it slip on the track, it'll only harm your diff. So don't check it on the track. Just build your diff with a lot of patience. Install it in your car and check diff slippage by blocking the spur and one rear wheel. For instance: Block the left rear tire with your left hand. At the same time, block your spur gear with the same hand. Now gently try to turn your right rear wheel with your right hand. If you can actually feel it will turn, stop and tighten your diff a little bit untill your diff won't be able to slip.
Set your diff a the loosenest setting at first; run a few laps (gently on the throttle) and then check your diff if it's slipping. If it is, tighten it a little bit more and repeat the procedure untill your diff has 'broken in' and runs smooth.

Good luck.

PS. Use the right lubrication.
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Old 01-20-2009, 06:42 PM   #13
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Quote:
Originally Posted by Trips View Post
On exit from a slow corner or from a standing start with hard throttle application, a slipping diff will make a short sound very much like the sound a cat makes when a rocking chair accidentally squashes its tail.

Sorry, I don't have a rocking chair at the moment, or I'd post a recording...
yea marshal that was funny
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Old 01-20-2009, 06:46 PM   #14
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Quote:
Originally Posted by Govert View Post
PS. Use the right lubrication.
This goes for every situation
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Old 01-20-2009, 07:06 PM   #15
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if she barks like a dog, stop immediately and check em out. their still too loose

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