Bandit127
Member
- Posts
- 73
- Location
- Southampton
I have a drive train knocking on my new for me 2001 TD4. I thought I had knackered rear diff mounts - but the symptoms weren't quite right. Instead of a knock on sharp acceleration I had a knocking while turning on full lock and applying a bit of power.
I had it checked today and it turns out that the rubber mounts that hold the VCU bearings in the housings are shot. The rear has about 3 mm of play and the front about 5 mm - both on the outside of the rubber. The rubber is bouncing around in the housing and that knock is coming through the floor. The VCU checks out fine, but I guess it could be damage from transmission wind up from a previous unit. Backlash in the IRD and diff were both OK so that's good.
I booked it in for new bearings so that should hopefully solve the problem.
In the meantime the underside is doing very well. A bit of surface rust here and there was all (apart from the peeling centre box on the exhaust which might need doing soon). One brake line was showing a bit of rust on a clip and that could potentially be an advise on the next MOT so I will clean that up.
All in all I am quite pleased, considering what could have been going on under there.
I had it checked today and it turns out that the rubber mounts that hold the VCU bearings in the housings are shot. The rear has about 3 mm of play and the front about 5 mm - both on the outside of the rubber. The rubber is bouncing around in the housing and that knock is coming through the floor. The VCU checks out fine, but I guess it could be damage from transmission wind up from a previous unit. Backlash in the IRD and diff were both OK so that's good.
I booked it in for new bearings so that should hopefully solve the problem.
In the meantime the underside is doing very well. A bit of surface rust here and there was all (apart from the peeling centre box on the exhaust which might need doing soon). One brake line was showing a bit of rust on a clip and that could potentially be an advise on the next MOT so I will clean that up.
All in all I am quite pleased, considering what could have been going on under there.