large vibration while accelerating
 

I just corrected another misfire issue with plugs/wires/coil/CKPS, within about 15 miles of a test drive I noticed a large vibration and noise during acceleration or maintaining speed going uphill or up slight incline. While coasting or using little throttle the vibration does not occur. It starts around 1600RPM and continues until I let off the gas. The vibration does not occur while in park or neutral.

I'm lost before I even started trying to figure this out, where do I start since I must have the vehicle running at 15mph+ before the symptoms start?

2002 Disco2
126K

If your Front Drive-shaft (Prop-shaft) has never been rebuilt, do that before you drive it again. You can tell it has been rebuit if it has a grease fitting on each of the U-joints (3). If only the front U-joint has a grease fitting that is original.
Take a look at your Flex-joint at the rear of your Rear Drive-shaft. If it is less than perfect, has any small cracks at all, then replace it. If it has never been replaced at 126K then it is due. In fact, replace it anyway. If the vibration persists then keep the old part as a spare.

All sounds logical. I checked the rotoflex at the back, it looked fully intact but I think looking at the cost comparison I'll get the rotoflex and cross my fingers about hte front drive shaft.

droland --

If there's one thing you really need to do, it is check your front driveshaft to see if it has been rebuilt. When (not if) the original driveshaft fails, it swings into your transmission and tears it apart (damage is directly proportional to your speed). You'd be looking at a new driveshaft, new transmission, and loads of time troubleshooting whatever damage might also have been caused.

You can buy a Tom Woods for $400, rebuilt ones for less than that, or rebuild it yourself for <$200.

It's not a matter of if/crossing fingers, but when. You really don't want to risk this one.

Ed

Thanks Red, I was reading similar sentiments about the front drive from others, came back here and saw your post stating the same thing.

All of the horror stories about the front drive shaft are pretty convincing, I'll get a rebuilt one.

1994-2004 Land Rover Discovery Upgrades - Four Wheeler Magazine

Why the front drive shaft is recommended.
:D

That's a good article.

Front drive shaft replaced, old u-joint was torn up. Vibration fixed, thanks guys.

Thanks for the closure, it's nice to know the solution.