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73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: tigwelder on July 25, 2011, 07:16:28 am

Title: 78 k20 play in front axle?
Post by: tigwelder on July 25, 2011, 07:16:28 am

noticed clunking noise when shifting from drive to reverse.watched u joint on  front trying to find where noise was coming from.it has a lot of play in it.would it be ring and pinion?

Title: Re: 78 k20 play in front axle?
Post by: beastie_3 on July 25, 2011, 01:56:41 pm

does the driveshaft have play when in park? What T case do you have? 205? 203? Could just be a bad u joint.

Title: Re: 78 k20 play in front axle?
Post by: 1979C20 on July 25, 2011, 05:40:16 pm

My brothers 2wd th350 clunks from D to R. Idk if the fact that its a 2wd helps you in narrowing your search?

Title: Re: 78 k20 play in front axle?
Post by: Captkaos on July 25, 2011, 11:15:09 pm

Is the yoke moving a lot?  or is there slop in the u-joint?

Title: Re: 78 k20 play in front axle?
Post by: tigwelder on July 26, 2011, 06:57:23 am

the yoke is moving alot. a little less then a 1/4 turn.

Title: Re: 78 k20 play in front axle?
Post by: ehjorten on July 26, 2011, 12:26:37 pm

Sounds like NP203 chain slop!  If you have a full-time transfer case or a part-time converted transfer case then you have the NP203 and it is most likely chain stretch inside the transfer case.  The design of the transfer case doesn't incorporate any slack adjustment or tensioning.  Mile Marker use to sell a chain saver kit that allowed you to take some of the slack out of the chain, but they don't seem to sell it anymore.  With all of that said...there are plenty of guys out there running NP203s with chain slop and they have been doing that for years!

Title: Re: 78 k20 play in front axle?
Post by: Irish_Alley on July 26, 2011, 01:59:53 pm

might be the cv part of the driveshaft

Title: Re: 78 k20 play in front axle?
Post by: tigwelder on July 27, 2011, 01:40:04 pm

thanks for all replies. going to take a closer look at everthing.