<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">If you change from a 3.90 to a 3.54 rear end you lose most of 1st gear. I changed my overdrive on my BJ8 to a BN2</div><div dir="ltr" data-setdir="false">and in 4th gear overdrive my engine operates about 600 RPM lower. It is a much better way to go.</div></div></body></html>