I have only 35K miles on my '08 garage queen housed in the desert southwest [ my "other car" was used most times], but after a cross country 2500 mile drive, 'ol Vera is "thumping" into reverse and the same with the downshift into first. This happens sometimes, not always and is a concern for sure Vera has had all required maintenance, although no change or flush of the tranny with the low mileage Any thoughts? Thanks,