members, please give feed back asap

[mercury5]

my rear end on my 03 Marauder is whinning again, how much usage do we get out of these . About 50 thousand miles ago, i had the complete rear end done, with 4:10 gears, now here we go again, :mad2: will it be better if i just swap the rear end with a crown vic or mark. and is there a way of knowing if it will fit without taking it apart. i know someone mentioned about a 32 or 31 spline. and what kind of maintancecan we do to prevent this. or is there a better type of rear axel that i should use. help pleeeese:bows:

[fastblackmerc]

my rear end on my 03 Marauder is whinning again, how much usage do we get out of these . About 50 thousand miles ago, i had the complete rear end done, with 4:10 gears, now here we go again, :mad2: will it be better if i just swap the rear end with a crown vic or mark. and is there a way of knowing if it will fit without taking it apart. i know someone mentioned about a 32 or 31 spline. and what kind of maintancecan we do to prevent this. or is there a better type of rear axel that i should use. help pleeeese:bows:

How is the fluid level?

Have you serviced the rear in the last 50k miles?

If you do a burnout do you see 2 black marks or one?

I'd drain the rear using Redline fluid for the refill.