Excursion transmission problems
Mountain Pass
Joined: Jun 2016
Posts: 214
Likes: 25
Blocked / plugged vent tubes are messy! I once accidentally bent one over when positioning an engine transplant (trans jacked up too high and ran into the floor), but I didn't realize what had happened until I was out on the highway. It was like a Spy Hunter smokescreen, trans fluid pumping out the dipstick tube all over everything.
Fleet Mechanic
Joined: Oct 2010
Posts: 1,997
Likes: 206
From: South Eastern Michigan
What trans fluid did you get? MERCON V? MERCON SP? MERCON LV? You must use the right fluid for the transmission, and in 2005 the Excursion could have one of two transmissions.
Gas engine trucks had the 4R100 and the diesel trucks had the 5R110W. The 4R100 used MERCON V and the 5R110W used MERCON SP or LV. Using the wrong fluid could destroy the trans.
Gas engine trucks had the 4R100 and the diesel trucks had the 5R110W. The 4R100 used MERCON V and the 5R110W used MERCON SP or LV. Using the wrong fluid could destroy the trans.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,730
Likes: 2,658
From: SE Florida
Ford used to have a spec for MERCON. That was discontinued in 2006. Now *ANYTHING* can be labeled as DEX/MERC or DEXII/MERCON. There is no specification and no control. So if you can tell me what's in those fluids I could tell you if they are compatible. All anyone knows about those is that the manufacturer says that they are for use in transmissions that used DEXRON or MERCON. But are they really? Who knows? I certainly do not. I do not buy any DEX/MERC fluids.
Fleet Mechanic
Joined: Oct 2010
Posts: 1,997
Likes: 206
From: South Eastern Michigan
Ford used to have a spec for MERCON. That was discontinued in 2006. Now *ANYTHING* can be labeled as DEX/MERC or DEXII/MERCON. There is no specification and no control. So if you can tell me what's in those fluids I could tell you if they are compatible. All anyone knows about those is that the manufacturer says that they are for use in transmissions that used DEXRON or MERCON. But are they really? Who knows? I certainly do not. I do not buy any DEX/MERC fluids.
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