Thread: rover diff drive flange nut

What is the correct torque range in a rover diff when you change the pinion seal. Looked in the book not sure which what is correct
Ibf ft
Crown wheel to differential case 111 . 125
Crown wheel to differential case 40 . 45
Differential bearing cap to pinion housing 54 . 74

The book says
53. Remove the pinion flange, pinion, outer bearing
and spacer.
54. Slide new shims, of the same thickness as the
originals (bearing pre-load) into position on the
pinion shaft. If the original shim was damaged or
mislaid use a new shim of at least 4,06 nim
(0.160 in) thickness.
55. Enter the pinion in its location in the pinion
housing and fit the outer bearing and spacer.
56. Fit the driving flange, washer and nut.
57. Do not fit the oil seal at this stage.
58. Tighten the pinion flange nut to the specified
torque. The force required to rotate the pinion
shaft should be within 23 to 40,25 kgf cm (20 to
35 Ibf in) when initial inertia has been overcome.
Change the bearing pre-load shim as necessary to
obtain this requirement. A thicker shim will reduce
pre-load; a thinner shim will increase pre-load.
NOTE: If using original bearings, which are bedded
in, the pre-load figure is 11,5 to 17,25 kgf cm (10 to
15 in Ib).
59. Remove the pinion flange.
60. Coat the outer diameter of the new seal with an
all-purpose grease and fit the seal, lip side leading
squarely on the pinion nose housing and drive the
seal into position flush with the end face of the
Lightly lubricate the seal lips with EP90 oil. Fit the
distance piece and flange and secure with washer
and nut. Tighten the nut to the specified torque
and fit a new split pin.
where is it ????


Or do put he new seal in and rattle the nut up with the 2 setting on my rattle gun and don’t worry to much. I used the rattle gun to get it off setting 4 and 100psi and it took a while so I thought 2 wont break anything. I reckon most workshop would do this.

In the back of the section are torque settings - the book says 70 - 120 lb/ft.
And it's just replacing a seal - no need to pull it all apart. If you marked it when you took it off, generally it's the right torque when you get it back to mark.