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Old 07-23-2009, 02:55 AM   #1
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Default Diff, how loose/tight?

just rrebuilding the diffs in my schumacher

just wondering how tight/loose the front and rear diff should be?
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Old 07-23-2009, 03:04 AM   #2
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In short, if it slips, its bad and if its too tight you'll flatten the diff balls.

With this in mind, I usually set mine deliberately a little on the loose side (but not too loose!) use the car for a straight line check and see hear how it accelerates, and tighten a little each time until I cannot hear it slip.

Definately not something to be adjusting 5 minutes before your first qualifier...
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Old 07-23-2009, 07:52 AM   #3
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And remember, after you first rebuild a diff, run you car bring it in and RECHECK IT! They normally loose up after a fresh rebuild, and you have to retighten them.

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Old 07-23-2009, 08:26 AM   #4
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sorry guys, first time playing with electric.. normally run nitro.

i rebuilt my rear-diff and it fairly loose now compared to the front.. such a pain in the ass to adjust.. gotta take the dogbones out.


how should the front be? looser than rear? or bout the same? tighter?
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Old 07-23-2009, 08:32 AM   #5
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Most that run a diff in the front tend to run it a little tighter then the rear.
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Old 07-23-2009, 08:32 AM   #6
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I've always heard that the front should be a bit tighter than the rear on a surface with good grip, however I really think it's personal preference depending on driving style. I've tightened both up quite a bit, ran a few laps and adjusted it from there. It's all about feel. Right now I have my rear a bit tight and the front a bit loose, but I'm getting unequal deceleration and I get too loose. Mine are a pain in the butt as well so I understand. It sucks to loosen a few pieces, take out the dogbone or cvd and adjust.
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Old 07-23-2009, 08:33 AM   #7
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Put the diff in the car and tighten it until it no longer slips. To check if the diff is slipping hold one wheel with one hand and the spur with your index finger so neither can move, and then try and spin the other wheel. If it spins, the diff is slipping. Tighten it in very small increments (e.g. 1/8-1/4 turn) at a time until it no longer slips.
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Old 07-23-2009, 10:14 AM   #8
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From what I have tried and read on teh Hudy set up guide there are many adjustments you can make to affect handling www.hudy.net I was having a problem with push on a med grip asphault track and lossened the front and tightened the rear each 1/4 turn and it helped alot...
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