Roy here's what I have---741 with 3.55s noisy bearings gears look ok, so I swapped em out with a 741 with 293s. It is quite, but they are a little tall for my van. would like to try some 323s. The 355s were to low for highway cruising. Do you have 323s for a 741? or any complete unit with 323s,I don't need a posi, open is fine as is any case, (489 741 742)