can anyone tell me what other vehicles came with the same box as my 90XJ I need a used one and was wondering if I can get one from something else more common...than you Clint
It's a Saginaw box. Probably every rear-wheel drive GM car in the USA is a potential donor.
Actually, there are two sizes of Saginaw box (I've been told), and the XJ box is the smaller box with three mounting ears. The large boxes have 4 ears. Try Camaros, Firebirds, etc. Just check to be certain the diameter of the output (Pitman) shaft is the same, so your pitman arm will fit the replacement box.