That sucks your having so many problems, mine still has the original seals with no leaks. I just had my rear axle apart and everything looks like new, even though this truck has spent a lot of time in mud and salt water. Are you lubing the seals and installing them in the right direction?
A couple of my buddies have newer jeeps, one a 4dr and the other a rubicon. If you think the ranger is old tech wait till you drive a jeep. Low speed offroading is the only thing they do well. They both have typical Chrysler quality issues.
Tacos are nice but way overpriced. I can't imagine why an F150 would be a headache, they are generally considered the most reliable trucks. My dad is now on his 4th F150, and has put over 200,000mi on each. None have had more than very minor issues.
CURRENT: 02 EDGE 4DR 4x4 4.0SOHC AUTO
FORMER: 93 XLT REG CAB 4X2 4.0OHV STICK