Does anyone have a reference for the proper torque settings of the diff housing on the gearbox. There are 8 bolts, 4 with 13mm hex heads and 4 with 15m hex heads - I know I had a fight to get them undone in the first place but my workshop manual just treats the gearbox as a single, unservicable unit and I could do with a bit of help in the info...

I just did them up..."so"... tight...

Which is exactly what I've done so far but they were done up so consistently that I'm pretty sure there is a proper torque setting for them...