Atlas diff rebuild
Posted: Fri Jul 21, 2017 8:05 am
Hi everyone.
Unfortunately after a lot of expense in the last 2 years to try and solve the transmission judder on my 2.8 (new flywheel, 3 new clutches, a complete gearbox rebuild professionally done, prop bearing and new doughnut bush) it appears the problem is still there. I have also where available used genuine Ford bits.
It is noticeable when you pull away as a tiny knock as the power is applied. This sounds similar to someone tapping their finger lightly on the rear floorpan. I have ascertained that this tap is coming from behind me and towards the centre of the car.
If you sit in traffic and crawl the problem gets much worse to the point you can't avoid it and the transmission shakes violently.
The original flywheel was badly scored and had cracked lightly on the surface. Changing this has helped no end, 95% better, but the problem is still fundamentally there.
I refuse to believe 3 clutches could all be faulty with the same issue. The prop is now absolutely textbook and is lovely and tight, so I think by making the rest of the transmission good I'm slowly exposing the fault. Also after unbolting anything and making a repair the fault goes away entirely only to come back as a slight knock as described after 50 miles.
I do have diff whine at about 70mph. I replaced the rear wheel bearings about 800 miles ago, they are quiet and are not leaking oil.
So having replaced everything (!!!) that just leaves the diff. I took the Rear cover off yesterday to change the oil and gasket. The crown wheel is shiney across the teeth but I'm not sure if the wear is equal. I'm wondering by undoing the propshaft I'm unloading the pinion gear and the crush washer which the manifests itself after a while when it's put back together and driven.
2nd opinions welcome!
Has anyone had one of these professionally rebuilt (non lsd) and what sort of cost was involved?
I've got a feeling it could be more than the bearing kits sold on eBay. I can take the diff out over winter but I'm reluctant to rebuild it as I've seen lots of stories about 0.003 shim accuracy to set the backlash etc.
Equally with the cost of second hand axles it is now getting to the point where repair is better value.
Thanks for reading this massive post and to any replies.
Olly W
Unfortunately after a lot of expense in the last 2 years to try and solve the transmission judder on my 2.8 (new flywheel, 3 new clutches, a complete gearbox rebuild professionally done, prop bearing and new doughnut bush) it appears the problem is still there. I have also where available used genuine Ford bits.
It is noticeable when you pull away as a tiny knock as the power is applied. This sounds similar to someone tapping their finger lightly on the rear floorpan. I have ascertained that this tap is coming from behind me and towards the centre of the car.
If you sit in traffic and crawl the problem gets much worse to the point you can't avoid it and the transmission shakes violently.
The original flywheel was badly scored and had cracked lightly on the surface. Changing this has helped no end, 95% better, but the problem is still fundamentally there.
I refuse to believe 3 clutches could all be faulty with the same issue. The prop is now absolutely textbook and is lovely and tight, so I think by making the rest of the transmission good I'm slowly exposing the fault. Also after unbolting anything and making a repair the fault goes away entirely only to come back as a slight knock as described after 50 miles.
I do have diff whine at about 70mph. I replaced the rear wheel bearings about 800 miles ago, they are quiet and are not leaking oil.
So having replaced everything (!!!) that just leaves the diff. I took the Rear cover off yesterday to change the oil and gasket. The crown wheel is shiney across the teeth but I'm not sure if the wear is equal. I'm wondering by undoing the propshaft I'm unloading the pinion gear and the crush washer which the manifests itself after a while when it's put back together and driven.
2nd opinions welcome!
Has anyone had one of these professionally rebuilt (non lsd) and what sort of cost was involved?
I've got a feeling it could be more than the bearing kits sold on eBay. I can take the diff out over winter but I'm reluctant to rebuild it as I've seen lots of stories about 0.003 shim accuracy to set the backlash etc.
Equally with the cost of second hand axles it is now getting to the point where repair is better value.
Thanks for reading this massive post and to any replies.
Olly W