I think 1000 bucks is a little pricey for a 10% reduction in rpm. The .77 or
.70 4th gears are only 240 bucks.  I think it might be more cost effective
to go with a little taller tires. I have one automatic van with (with a 2.5
Subaru) that I would love to have a taller R&P, but that I can't justify
that price for such a small change.  I would probably be willing to shell
out 500, but not a grand.

John
Vanaru.com