this is very bad news pal , looks like theyve left it loose knowing there wasnt a pinion seal in it, and just forgotten and given it you back, no excuse tho really , i mean six weeks is very poor.

i hope you get a deal on the cost of this pal, i for one would give you your money back if i had given it you back like that.
i know toms stuff is very good, but like you say its obv coventry transm thats the prob here.

id take the back cover off and check the cwp mesh to be sure now, its not like its a 2min job if its not right, and could be quite expensive.

good luck marco, sounds like you need it pal.