Give us a little more info.
Peter,
Post your location so members might give you recommedations on the nearest reputable trans repair shop. It also helps to create a "signature", the info shown at the bottom of your post about the particulars, (2WD, 4WD,mods,etc), on your truck. This gives the members a little more insight into the possible solutions that may be available to you.
At the top under Discussion Forums you will find the "User Contro Panel" and access the "Signature" fill in there. Good luck on your repair.