- Thread starter RaceDiagnostics
- Start date
RaceDiagnostics
Member
- Messages
- 3,568
- Location
- Broughty Ferry
Morris
Forum Supporter
- Messages
- 2,351
- Location
- Northamptonshire.
There should be a figure for the clearance in the clutch pack, taking up all the clearance will make it generate heat at every turn.
Edit. Is there anything that preloads the clutch pack? Because that torque figure must relate to that, loading up gears to get that sort of reading makes no sense (to me).
Edit. Is there anything that preloads the clutch pack? Because that torque figure must relate to that, loading up gears to get that sort of reading makes no sense (to me).
I had a similar thought, but with no knowledge to back it up! But I would have imagined some 'slip' is needed rather than to make it totally tight?
RaceDiagnostics
Member
- Messages
- 3,568
- Location
- Broughty Ferry
I understand what you and reb78 are saying, it also seems odd to me.
There is no spring tensioner etc, the manual just says, pack in the clutch plates with the final one of the correct selected thickness to create the torque specified.
The stack looks like this.
Any further insights are welcome as it's all a bit confusing to me.
Morris
Forum Supporter
- Messages
- 2,351
- Location
- Northamptonshire.
@RaceDiagnostics that's very clear. Unusual way to preload it. Mine is the same design but runs with 0.030" clearance (from memory). They were originally preloaded with a spring set but proved to be too severe in action for most drivers (admittedly we are talking about Sorento drivers here) and the preload was removed early on.
Edit. the only consequence of lack of preload is that clutch pack engagement will be lazy.
Edit. the only consequence of lack of preload is that clutch pack engagement will be lazy.
RaceDiagnostics
Member
- Messages
- 3,568
- Location
- Broughty Ferry
I've only found one other person on planet earth that's rebuilt one of these Merc LSDs, he said that he couldn't get over about 60Nm before finding it impossible to get the spider gears in. I'll just try to do similar so all the slop is out and the torque is as high as possible but not necessarily the spec.
Morris
Forum Supporter
- Messages
- 2,351
- Location
- Northamptonshire.
That's what I don't understand, you're trying to torque a solid clutch pack up with no give anywhere. I could understand if there was something like a Belville washer in there.
Also this type of LSD relys on the spider gears moving out under differential speeds to load up the clutch packs. Seems a bit counter intuitive if the whole lot is clamped solid.
RaceDiagnostics
Member
- Messages
- 3,568
- Location
- Broughty Ferry
RaceDiagnostics
Member
- Messages
- 3,568
- Location
- Broughty Ferry
Half thought about the quaife, but I'm just looking to get this buttoned up with minimal slack. I don't really care too much about the LSD function. The engine is only 220bhp and it's no racer, more of a poser.Replace it with a Quaife ATB diff - yours for only £1200
I had a pair of Quaifes in my 110 - they were awesome for higher speed loose stuff - not so good for rock crawling. I think the Focus RS used them as standard.
Lovely pic!
Quaifes are incredibly strong. The ATB works in a similar way to a Torsen diff - no plates or shims to mess about with. All helical gears with a lifetime guarantee. Although yours lasted pretty well in fairness
RaceDiagnostics
Member
- Messages
- 3,568
- Location
- Broughty Ferry
The LSD wasn't working at all and one of the spherical washers had disintegrated leading to backlash so I have to do something.
New shims due here in a few days.
New shims due here in a few days.
