I have just polly bushes the rear beam mount and am getting a bit of diff noise coming inside the car is this normal. It is as loud as a wheel bearing starting to go and sound like a gearbox bearing on its way out.

But prior to fitting the bushes there was no noise from the diff and i have not polly bushed the trailing arms.

I did not get any instructions with the bushes so when it came the rear beam i phoned around and they said the big cone bush replaced the original and then a donut type bush went on top with the largest hole pointing towards the bottom of the car. Has any one got instructions of these type of bushes to verify the top spacer bush is in the correct way.