Just had to have my 42RLE transmission rebuilt after only 57,000 miles on my 2003 Wrangler. I Had problems with a harsh down shift since brand new. Not all of the time but got worse after 45, 000 miles. Dealer did a quick learn on a couple of occasions, but never looked for the real problem. i had to pay the rebuild cost because my 3 year 36,000 mile warranty was over.
The dealer also had to replace the front pump assembly per TSB#21-004-05 at 49,000 miles because of a continuing cold start problem.
Has anyone else had this type of problem with your transmission ???