Need to know what engine is in it. if it is a 4 cyl it probly has the 21 spline and six or 8 cyls would be 23. What engine does it have? 4 cyl could be 42RE, 4.0L AW-4, 8cyl 44 RE. AW-4 has 19 bolt rectangle pan. <img src="/forums/images/graemlins/cheers.gif" alt="" />