I am looking at a 2004 Discovery SE. When I am doing like 25 mph and I release the gas pedal and hit it again there is a loud thud under the truck. This continues for as long as I keep doing this. Is this a tranny or axle. Is this normal by any chance?

 

Stop driving it and if you are mechanical enough, get under and check it out, otherwise call your mechanic on Monday.
Sounds like a u-joint, if so, could be the double cardon.
STOP driving it.

 

it sounds like its normal. the transfer case is completely gear driven, and loading/ unloading the drivetrain will cause a clunk in the gears. as long as it is a deep pitched somewhat heavy clunk, its fine. if it sounds more hollow and metalic, it might be the u-joints in your hookes joint, as mentioned above. however those u-joints starting to fail will always cause a strong body vibration under accel at about 30 mph.


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Rovers are known for a small noise, but if this is something new, check and replace your u-joints with special attention to the two on the front shaft where it attaches to the t/case.

 

if you go the route of replacing the u-joints, be very careful of the center piviot bearing inside the hookes joint (double u-joint) it can be very hard to set this back up right, ive seen several seasoned techs have cars come back a week later and need a whole prop shaft cus it wasnt right.


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