I would be checkin for play in your rack as this is where the play usually developes the worst on sprinters.
After that I would assume perhaps a KE70/AE71 rack would have the same uni in it as it was once thought that the racks were interchangable between these and sprinters, but it was found the rack internally is different.
Just go to a wreckers and have a good look at them.
Good luck,
Jeremy