94 transfer case problems - Defender Source
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  #1  
Old March 16th, 2005, 11:03 AM
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Rich Campbell
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94 transfer case problems

The local shop has told me that mt transfer case chain is lose which is causing a loud vibration at times. They recomend replacing the whole case. Any advice?
Thanks
Rich
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  #2  
Old March 16th, 2005, 11:09 AM
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Chain???

Not if it is a 90. There is no chain in the LT230. Run away from that shop very quickly.

If there is a lot of backlash check for spline wear between the gearbox output and the t. case input. This can be examined by removing the PTO cover.
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  #3  
Old March 16th, 2005, 11:12 AM
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LOL! Well they are full of it! Your T-case is Gear driven! NO chain! And they all make a little noise, if the fluid looks good an it shifts in and out of difflock and hi/lo then it should be fine.

Follow-up Post:

GO back and tell them to change your muffler bearings and see what they say!
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first then ask questions later! The loose nut behind the wheel
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  #4  
Old March 16th, 2005, 11:13 AM
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Can you explain the symptoms in a little more detail? Maybe we can offer some suggestions of things to look at.
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  #5  
Old March 16th, 2005, 11:18 AM
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VERY loud vibration. Sounds kind of like metal rubbing against the tire but that is not it. It comes and goes and the truck runs fine. I thought I had a flat tire this morning. Check under the 90 and saw nothing unusual. I'm pretty sure they something like chain/linkage losining up. The sound happens in gear and coasting. It is not constant though.
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  #6  
Old March 16th, 2005, 11:22 AM
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Does it happen at all speeds? What about high or low range, or different gears? Does it happen when turning?
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  #7  
Old March 16th, 2005, 11:25 AM
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It seems to be better at high speeds. Didn't try low/high. It also didn't seem to make any difference what gear I was in or if I was turning. I do seem to remember it was was a little worse when I slow to a stop.
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Old March 16th, 2005, 11:28 AM
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Hmm, maybe a U-joint, take a look at the drive shafts, or after your next drive around town feel the U-joints when they are bad they normally get warm.
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  #9  
Old March 16th, 2005, 11:42 AM
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Thanks I will give that a try.

Follow-up Post:

Just talked to the mechanic. He said that sometimes there are chains in the tc and the get lose or the gears could be grinding. He said the u joints are tight and there wasn't any metal in the fluid.
WTF>
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  #10  
Old March 16th, 2005, 11:52 AM
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Hmm, pull one drive shaft off at a time and take it for a spinn with the t-case in diff lock to check if the problem is related to front or rear axles, it could be bearings have your breaks been working good?
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  #11  
Old March 16th, 2005, 11:57 AM
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Like I said, find a new mechanic quick. He seems to no zip about a Rovers. The t. case is an all gear unit. They do NOT ever wear out. They are very robust unit. If a tooth is broken or similar, it will make serious noise all the time.

I would look at wheel bearings and brakes.

If the wheels seem solid, then start by pulling driveshafts. First the front, then the rear. Drive around in 2WD and see if the problem goes away. Try in and out of diff lock. Low range, high range.
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Old March 16th, 2005, 12:00 PM
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Just in case, I read the factory service manual and looked at the parts diagram for the LT-230, the only chain mentioned in an entire rebuild of the transfer case is a safety chain to hold it onto the jack while removing and installing it. Tell him isn't not a damned New Process transfer case, it's a Land Rover. I'll snap a picture of the parts diagram if you want to print and show the guy.

You might also want to check for something out of alignment or loose inside the parking brake drum.

-Hans
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  #13  
Old March 16th, 2005, 12:06 PM
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Thanks guys. I will be quite busy trying to figure this one out.
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  #14  
Old March 16th, 2005, 12:23 PM
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check you engine mounts,mine went on the disco.LR here charged me $1000 fixing all sorts still didnt fix it
a friend jacked the engine and it cost me a new mount
no more dealers for me
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  #15  
Old March 16th, 2005, 12:49 PM
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The noise speeds up as I speed up.
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  #16  
Old March 16th, 2005, 01:17 PM
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Was this transfer case ever replaced? If you use bolts that are too long when bolting the transmission to the tcase you can cause all kinds of havoc. Also, if one is missing the fluid can drain out.
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  #17  
Old March 16th, 2005, 02:24 PM
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Never replaced and fluid level is fine.

Follow-up Post:

If I put the TC in neutral and coast could that determine if it is in the TC or somewhere else. Sorry for the dumb questions.
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  #18  
Old March 16th, 2005, 02:33 PM
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I would try some high and low range driving first, then if it still seems T-case related drain the fluid and remove the inspection plate and have a look inside.

Follow-up Post:

You could also jack up one wheel, have and spinn the driveshaft and listen to the T-case to see if you hear anything comming from it.
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  #19  
Old March 17th, 2005, 09:54 AM
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Well, Tried in LOW and it shifted fine and ran ok. It did move VERY SLOW like a crawl. I guess this might be normal for LOW.
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  #20  
Old March 17th, 2005, 10:02 AM
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yeah. I walk faster than my D-90 goes in 1st gear and low. have you never used low before?
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