Thread: What happened to your Discovery 2 today?

Ok Team, solve this one….
Vibration starts when accelerating/opening throttle between about 1900rpm through to 3100 ish…
Drive shafts ok
Stall test ok
When in neutral no vibration….
When cruising no vibration….
Locking in 1,2, 3 still vibrates…
Rubber donut thing looks intact…

Transfer case??!!
Engine mounts???

I have no clue beyond the above…

Cheers DDM

PS…. I have a sneaky suspicion it’s the injector harness….

Harmonic? Any noises?

Originally Posted by V8Ian

Harmonic? Any noises?

No noises other than vibration.
Not quite harmonic. Can seem to smooth out but not from saturation vibration.
It has almost a similar feel to a mis-fire, hence my injector loom theory

check engine mounts. From under the car, you will see a hole at the bottom of the mount in the middle of it. You can fit the non pointy end of a drill bit in there or something else not sharp and estimate how much clearance you have within the mount. I can't recall what they should be from new, when installed, but about 10mm of depth is roughly how far into the mount it should go. If not, then they have collapsed, and can cause bad vibes.

Easy to check the gearbox-T/C mounts too, use a lever to jimmy the box upwards and it'll be obvious if they have delaminated too.

Originally Posted by AK83

check engine mounts. From under the car, you will see a hole at the bottom of the mount in the middle of it. You can fit the non pointy end of a drill bit in there or something else not sharp and estimate how much clearance you have within the mount. I can't recall what they should be from new, when installed, but about 10mm of depth is roughly how far into the mount it should go. If not, then they have collapsed, and can cause bad vibes.

Easy to check the gearbox-T/C mounts too, use a lever to jimmy the box upwards and it'll be obvious if they have delaminated too.

Thanks AK83!. Will check in the next few days
Have cleaned the injector loom connections including the control module box. Nothing to note.
Harmonic Balancer was replaced 15k km ago, released the belt and that seems intact…..

Originally Posted by AK83

I can't recall what they should be from new, when installed, but about 10mm of depth is roughly how far into the mount it should go. If not, then they have collapsed, and can cause bad vibes.

Easy to check the gearbox-T/C mounts too, use a lever to jimmy the box upwards and it'll be obvious if they have delaminated too.

When I did mine you could look under and see the rubber blocking the hole, annoying vibration at idle, can't recall driveability issues though, I bought genuine and they sit up 20 mm from bottom of hole.

That was 3 yrs or so ago and they're still up there.

Also my doughnut looked ok until I removed it when doing transfer case and it suddenly wasn't, so that was replaced with one of those solid metal units with poly bushes in the bolt holes.

My little tasks over last 3 days

Replace front diff centre with one from 2004 disco

Replace driver CV boot while axles out (good excuse to buy band tightening tools)

Install the CDL lever I got from aforementioned 2004 disco (yay 1 more pretty light)

Replace XYZ switch and unwrap and rewrap the replacement transmission loom and put extra protection around where the old one had been chafing on the transmission.

Pull out the 2 non functioning cdl switches, chop one and refit as a plug, put new one in easier to change forward hole. I've still got the second connector there in case I do decide to parallel them up when the new one goes eventually.

Did not cut the slabs wire, I will stumble across the later unit at some stage and change over.

I drove it during the week for a short drive and it
Got worse… but diagnosed it was not the transmission as it was related to the drive shaft or transfer case….
Well I finally had 20 minutes to myself this afternoon crawled under and clunk clunk clunkitity clunk from the cardan joint….

Will buy a rebuild kit