front diff?

[kizz81]

hello,
i have a leak on the rear of the front diff and have got a replacement seal

is it easy to do or should i top it up and wait untill after manby?

cheers kieran

[SimonHarwood]

Is the leak from the pinion seal?
I had a leak there on my rear diff and the advice I was given was to get the garage to do it because you might need special tools and if you must do it exactly right (note: you don't set the nut to a specific torque) or you can cause serious damage to the axle and/or prop shaft from using it afterwards.

[clbarclay]

Changing the pinion shaft/bearings is an involved job requiring the right shims to preload it just right, but just changing the pinion seal is not to bad a job to DIY. The big nut is done up to a proportionally high torque so a good breaker bar or T bar with a length of pipe to extend it will most likely be required. That or a good impact drive.

While yor at it, check the axle breather pipe. This might be blocked, causing the axle to preasurise and force oil past the seal.