Heya gang,
Pretty common problem here but just wasnt 100% on what the correct action would be. When it changes gear mainly in low speed (around 30k's) theres a fairly noticeable clunk coming from the back. Innitialy i thought it might be the shift kit, but it still clunks when its off. I got a EL I6 with the 3.08:1 diff, auto and shift kit.
Some help would be good, i was thinking of just changing the diff oil.

regards,

sam

sounds like upper and/or lower control arm bushes.allowing the diff to move,also other rear bushes watts link etc.