What did you go for in the end, 40/65?heya works like a charm now.
the preload is quite low which is street friendly. jacking one wheel up n it turns with some resistance so preload ring is still working. the mid-corner lift sudden release has gone and so LSD engagement is much much smoother now with such low preload.
launch traction is as usual gr8 when the torque locks up the diff enough
I had an e-mail back from gripper and the contents explained a lot to me. They were stating that they make them up with between 65 and 75lb/ft of preload, which on a car that makes 100lb/ft is pretty insane. That adequately explains why I have been experiencing the things that I have. They suggested re-building it with 40/65 ramp angles and with 20-30lb/ft preload, which I can appreciate will make the car behave VERY differently.
I think I will send them the 31V LSD unit, as there is no point in having the 30A version re-built as it will never be used. I will also more than likely go for a unit without speedo drive this time, as I am intending to use one of the ABS hubs as a pickup for an electronic speedo.
Now that I have heard the above, I am feeling all together more positive about going forward