Hi there, i have a 2wd saph and have taken the back plate off of the diff, can anyone tell me if there is suppose to be a gasket between the diff and the back plate as mine does not seem to have one of any sort. Also whilst the cover was off i checked inside and the oil is very dirty, i have removed the oil but there are still bits inside which i cant get to, what can i clean the inside out with without taking it all apart.

any suggestions? cheers.