Guys, 1. How much would you expect to pay in labor to get a rear main (1 piece) seal changed on a '90 350? i've got neither the time, tools, or experience to drop my tranny to change this. 2. Just to check (if for some weird reason its not the rear main), where is the oil pressure gauge plugged in? Just wanted to check and see if that was the source. K-5...Soccer moms inquire within.