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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 1911fan on September 25, 2015, 07:09:05 PM

Title: Teflon coating on slip yoke splines peeling
Post by: 1911fan on September 25, 2015, 07:09:05 PM
I posted this on another forum,  but don't know how much overlap there is so was curious on everyone's opinion here. Pulled my rear driveline to work on the U-joints, noticed the slip yoke was dry and caused about 1/3rd of the splines to lose their teflon coating. The slip joint is still tight when assembled, but I have heard it is best to have the spline end replaced and re-balanced when you lose the coating. Is this truly the case? Or can I just lube it well? Local shop wants upward of $300 to replace the spline e
Title: Re: Teflon coating on slip yoke splines peeling
Post by: Irish_Alley on September 26, 2015, 08:15:29 AM
i never knew there was a coating on the splines. always just see/use grease, i wouldnt worry about a teflon coating if they have grease on them
Title: Re: Teflon coating on slip yoke splines peeling
Post by: 1911fan on September 26, 2015, 07:06:02 PM
I was told that without the Teflon that the fit gets sloppy and vibration will show itself.  Also that binding can occur, am hoping I can just run it.  Noticed all this when I had to pull my blown transfer case.
Title: Re: Teflon coating on slip yoke splines peeling
Post by: Irish_Alley on September 26, 2015, 10:46:54 PM
makes sense in a way i mean dirt sticks to grease. but im sure ive seen grease zerk fittings on the female side
Title: Re: Teflon coating on slip yoke splines peeling
Post by: 1911fan on September 29, 2015, 05:04:20 PM
Well, took my drive line down to the local driveline shop. His opinion was I could pack it with grease and run it, but that it would most likely vibrate and cause damage to the slip yoke eventually. Also, since I just rebuilt my transfer case was concerned about undue stress on that. He recommended cutting off the stub end (splines) and welding in a new one. Price out the door is $350 for the cut and weld, new center bearing and shaft balance.  A lot higher than I was hoping, but what are you going to do.
Title: Re: Teflon coating on slip yoke splines peeling
Post by: Irish_Alley on September 29, 2015, 05:21:39 PM
grease ;).