Thinking v2
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,490
Likes: 7,619
From: MI
Trans fluid is (still) leaking into the xfer case, but it's taken 5-ish years for a quart to move past the output shaft seal again. How bad is this for the xfer case? I know the level is too high, and that needs to be rectified, but what about the Mercon V "contamination?" I should drain and refill, but I guess how bad us it for this to keep happening, and should I just bite the bullet and gave it fixed?
Haven't heard of this one. Perhaps that's why they've blown in the past. Others blamed Merc V for it ...
Now an XLT in Colorado
Joined: Aug 2016
Posts: 5,975
Likes: 3,168
From: Colorado
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,490
Likes: 7,619
From: MI
Low trans fluid, no leaks, and the last time this happened, the t-case level was way above the fill plug. Going to head out shortly to drain the excess at least so I don't pop a T-case seal. Not sure how soon I'll be able to drain and refill with the proper fluid, though.
Good catch!
Last edited by Jbrew; Jan 16, 2025 at 07:19 PM.
Senior Member
Joined: Oct 2017
Posts: 1,728
Likes: 440
From: CA near Frisco
Well, I might fill and drain, rather anally once, then check in 3 & 6 months and a then a year. Bounce that year against recommended intervals, the fluid level, and implement your own choice of answers. Like, do it on her birthday. That way it will help you remember it. The birthday, I mean.