| Author | Message | ||
     Kennith P. Whichard III (Kennith) Senior Member Username: Kennith Post Number: 387 Registered: 05-2002 |
I recently discovered a strange noise coming from the underside of my Disco II. It sounds about like someone shaking up a spray can, or winding up a toy car too much. It's frequency increases with the revolutions and decreases with decelleration. The frustrating thing is it dissappears with a louder noise upon application of the throttle. It is not present when in nutural or in park, nor while sitting at sstoplights in drive. I have been driving around all day with the transmission tunnel plate and center console removed trying to place it, but it's driving me crazy! Any ideas or similar experiences? I tried to do an archive search, but my connection is lagging and can't stay on long enough to make the search, so please spare me this one transgression.  Cheers, Kennith | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 231 Registered: 04-2003 |
Bad U-Joint maybe? | ||
| JVelocet (Vracer) New Member Username: Vracer Post Number: 36 Registered: 06-2003 |
Could be two things: Bad Cat. Converter, they rattle under accelration and decelration, or worse transfer case problems. You can test the cat. converter by hitting it with a rubber mallot, if it sounds like a bag of bolts it is bad. | ||
| Kennith P. Whichard III (Kennith) Senior Member Username: Kennith Post Number: 389 Registered: 05-2002 |
I went out and smacked the cat, but it didn't make any noise. So it must not be that. About the U Joint, how do I check that for sure? And if it's not that, it must be the transfer case, right? Cheers, Kennith | ||
| Kennith P. Whichard III (Kennith) Senior Member Username: Kennith Post Number: 390 Registered: 05-2002 |
Another, albeit unrelated, question. Is it possible for the added restriction of a custom snorkle to cause a blown oil seal somewhere? I think it's either the front main seal or the oil pan gasket. Cheers, Kennith | ||
| Bruce Potier (Brucep) Member Username: Brucep Post Number: 54 Registered: 06-2003 |
Got to ask Ken, but why would someone further restrict the intake, custom or not? Putting on a Mantec or Safari should not restrict airflow if done correctly. Have you seen the diameter of a stock airbox horn? Also, I am only a shadetree type of wrencher but I see no logical connection to air induction and crankcase pressure. | ||
| Dean Brown (Deanbrown3d) Senior Member Username: Deanbrown3d Post Number: 830 Registered: 02-2002 |
Put it up on 4 axel stands and see if it does it when you rev and all 4 wheels are moving at speed. You may have to pull the ETC fuse first. | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 240 Registered: 04-2003 |
If a U-Joint on the drive shaft, you should be able to grab the drive shaft and move it....you will feel or hear play in the U-Joint or you might see or hear something in the T-Case.... | ||
| Kennith P. Whichard III (Kennith) Senior Member Username: Kennith Post Number: 391 Registered: 05-2002 |
Bruce, I really didn't think the restriction would harm anything, and it probably didn't. The truck is plenty fast and has plenty of power, so I figured if a little restriction was al it would take to get the air intake up and out of the water for 20 bucks, what the hell? I used 2 1/2 inch ID PVC pipe to make the snorkle, along with pool hose for the bend. It actually looks damn good, so it's a shame I may have to remove it just to eliminate the variable. Dean and Joey, I'll check it out. I can mess about with the U joint now...Ok, with the vehicle off and in park, I twisted on both driveshafts to no avail, not even a budge. I suppose this leaves me with the jackstand test. What do you think I may be looking for? Cheers, Kennith | ||
| Bruce Potier (Brucep) Member Username: Brucep Post Number: 58 Registered: 06-2003 |
When my u-jts went south, the entire vehicle vibrated in a particular mph range. I placed the truck on jacks but to no avail. If you are trying to isolate bad u-jts, get a large screwdriver and do some delicate wedging between the joints. Spin those joints around and get a very-very good look. If they don't budge by wedging, probably not your issue. BTW, truck on stands, get someone to sit inside the cab to hit brakes just in case. Don't need to read about you becoming LR roadkill or your garage getting a new LR entrance. | ||
| michael harrington (Mike97d1) New Member Username: Mike97d1 Post Number: 16 Registered: 07-2003 |
bruce, i've been tring to email you about those diff carriers. i need them, or at least the front. [email protected] or 910-232-5067. |
