Transfer case question...
Thread Starter
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Tuned
Joined: Aug 2006
Posts: 405
Likes: 42
Transfer case question...
Hey guys, like the title says. I wrote a few days ago asking about some driveline noise, but noone responded. I think I have narrowed it down to the transfer case itself. I know there is a chain inside. I know that chain can/will stretch. My question is how much can it stretch before it is no good, and how can I test for it?? I REALLY dont have $1400 for a new TC if this one explodes. Any input is welcome.
Aaron
Aaron
Junior User
Joined: Jun 2007
Posts: 53
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From: Central New York
I really have a hard time believeing its your transfer case. The ones in these trucks are just about bullet proof. I see guys running fourwheel drive pulling trucks that absolutly swear by these. The New Venture Gear website says these things will handle almost 8000ft/lb of torque and can be used in a vehicle close to 18000lbs. Check it out @ http://www.newventuregear.com/tcases.html Are you sure its not something else? Maybe you can give the symptoms? I'm sure someone here can help you though if it really is your transfer case. Could be a bearing in the driveline or a u-joint maybe. Does it make some sort of noise or vibration that you can tell is coming right from the case? Let us know...everyone is here to help.
Thread Starter
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Tuned
Joined: Aug 2006
Posts: 405
Likes: 42
Thanks for replying cyclenut. The only symptom that I can tell is I hear a grinding noise. It sounds SO much like a bad bearing, but another thought crossed my mind--the chain rubbing the case. I know the chain can stretch. If it stretches too much, could it rub the case? I was also worried that the chain may get so stretched that it would go slack, bind up by folding over itself, stop the output shaft dead in its tracks, and then make the TC explode. (I have seen someone on this site post that happening to them. Not sure if thats the exact chain of events or not.) With this in mind, I put the TC in 4wd, crawled under the truck, and checked the rotational difference between the front and rear driveshaft, and there is a considerable amount of slop IMO, like a sloppy chain. It might be the gears inside, but Ive never seen one apart to know what exactly is inside. It may very well be a failed bearing. When I first checked this out last weekend, I believe I traced the sound to the TC. I think the next step should be removing the rear driveshaft and listening again.
Just FYI, here is the post I made before: https://www.ford-trucks.com/forums/7...ine-noise.html
Just FYI, here is the post I made before: https://www.ford-trucks.com/forums/7...ine-noise.html
Junior User
Joined: Jun 2007
Posts: 53
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From: Central New York
Well, I looked at your other post and you did say the carrier bearing is whipped. I'm sure that would cause quite a noise especially with the hollow driveshaft magnifying it. Thats a pretty cheap and easy fix I mean at least compared to a transfer case. So I'd start there. Have you checked the lube in the transfer case to see what it looks like...or if there is any even there? Might not be a bad idea to change it anyway. Its easy to do and only takes half an hour. Then you can check for metal particles or pieces for that matter. If something were coming apart in the transfer case it would show up in the fluid.
Thread Starter
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Tuned
Joined: Aug 2006
Posts: 405
Likes: 42
Thats not a bad idea with the carrier bearing. Changing and checking the fluid is a great idea. I dont know why I didnt think of that. I will definately do that. Any idea what type of fluid is supposed to be in there, and how much?? Thanks for the help.
