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Old 04-21-2003, 08:44 AM   #1
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Default Need Help Building my TRF414M WCR

I am currently building my TRF414M World Champion Replica and I am having a little bit of trouble understanding step 6 which is the ball diff assembly. I have put the diff together and have put the long screw through the ball thrust bearing, through the centre of the diff, through the diff spring and screwed it into the lock nut. What I don't understand is how to tighten the diff and how much I tighten it. The instructions say to hold the left and right diff joints steady and tighten the centre of the diff to prevent it from coming loose but it says don't overtighten. How much do I tighten the diff and how much do I tighten the long screw into the lock nut?
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Old 04-21-2003, 09:58 AM   #2
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When you're building the car, just tighten the screw down gently. Do a final adjustment on the diffs when they're in the car.
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Old 04-21-2003, 10:25 AM   #3
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Yes, tighten it down gently, but not too loose. I over tight mine and damage the lock nut holder.
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Old 04-21-2003, 10:10 PM   #4
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Make sure to "break in" the diff before really tightening it. If your not using Carbide balls, the balls can flatten. If your using carbide the balls can dimple the plates. Both are not good, but will work themselves out after some use. By breaking in the diff i mean, lightly tighten to feel friction between pulley and the diff halves. Install into car, you might even run the car lightly (hold one tire and give light throttle), then tighten the bolt to suit your style of driving and setup. The bolt will stop afterit gets tight. One other trick I use is make sure to use a pair of pliers on the spring, and compress it a couple of times, then install into diff, after the spring tries to regain full legth it makes the diff get a little tighter without damaging anything.
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