Why the Plastic coating on Aftermarket Driveshaft Splines? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 6 Old 09-30-2013, 09:38 PM Thread Starter
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Why the Plastic coating on Aftermarket Driveshaft Splines?

I took my Tatton Drive shaft out this past weekend to re-affix the OEM dust shield on the rear pinion flange.

The two halves of the driveshaft were basically seized together on the splines. I used a hammer and finally got them apart.

There was a thin layer of plastic on the splines that was all chewed up and cracked. I removed it, greased up the splines and put it all back together.

Now I am reading that the plastic is necessary for tolerances and balancing the shaft. I called several driveshaft places including Tatton and there is no way to replaced the plastic. The spline must be Cut off and a new spline with the plastic has to be welded on. Then the entire assembly needs to be rebalanced.

How ridiculous is that? Older vehicles never had plastic coating on splines and slip joints or slip yokes.

So for now I'm driving it without plastic and it seems fine but the shops I have called said driveshaft needs to be repaired and not to drive it.

The prices I have gotten are $150 - $225 to replace the spline.

Tatton is sending me a Brand New shaft without the Yokes for $260 shipped. This way I get new shaft, new splines and all new CV and U-joints.

Does anyone make a DS without the plastic? Is it required since DS don't use hardened steel or something? Seems crazy to me.

I guess I'll do a better job of keeping this one greased and clean. The first one lasted 40K miles. All the Joints are great .. just the damn plastic cracked and flaked. Luckily I didn't damage my Transfer case with a seized slip joint.

2009 JK - 2DR - 6SPD - 1/2 Doors
4.88 G2 Gears / Warn XD9000i / Custom bumpers & Swing Gate
XRC Rock Rails / 35" Kumho's on Black Rock Vipers
2.5" Mutt Lift / Rubicon T-Case / E-DISCO / VIAIR OBA
Rear CV Driveshaft / Rear Detroit Locker / Front Aussie
Teraflex Sleeves / Gussets / Nitro Chromoly Axles
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post #2 of 6 Old 10-01-2013, 07:43 AM
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Can you take a picture of what you're reffering too?

-Mike
2007 2dr X, 6sp, 35's on D44's, 2" lift, cage, hydro, etc.
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post #3 of 6 Old 10-01-2013, 08:01 AM
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The plastic is supposed to help the splines slip kinda like a permanent lube. The problem is if you don't keep the shaft properly greased the coating can get messed up. Also if you wheel in a muddy environment it will also take a bigger toll on it.

I know I learned the hard way as a teenager wheeling in the soft sandy mud of New Jersey. The sand and mud would get everywhere including bearings and any other wear item. Grease is your friend in this case.

09 Rubicon Unlimited on 42's with some stuff


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post #4 of 6 Old 10-01-2013, 08:20 AM
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My Tom Woods on my LJ didnt have that. I thought the lubrication came from the zerk fitting and you lubed it regularly? All these years with out that coating and never had a problem.
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post #5 of 6 Old 10-01-2013, 08:42 AM
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It keeps corrosion off the splines and makes the surface slicker. Still need grease for lube.

Some build info here:
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post #6 of 6 Old 10-05-2013, 05:57 PM
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i think its teflon coating or pvc or something very similar

MISHIMOTO IS JUNK
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