9mm hex
Try a TORX T-40 or 45 Many second generation Expeditions (2003-2006) use a 9mm to remove the front caliper and a 7mm for the rear.
9mm hex key front and 7mm rear
To remove and replace floating caliper mounting bolts. 3/8" and 8mm hex bits are used for General Motors vehicles. 7mm and 1/4" hex bit are used for Ford. 2003-2006 Ford Expedition use the 7MM hex bit. 7MM hex bit does not work on a 2006 Expedition. Looks like it requires a 9MM, the only one that is not included in my hex set. On a 2006 Expedition Limited, the front calipers use a 9MM hex bit while the rear calipers use a 7MM hex bit.
The 2006 Ford Expedition has 39.7 in. of front head room.
The 2006 Ford Expedition has 63.0 in. of front hip room.
The 2006 Ford Expedition has 41.2 in. of front leg room.
The 2006 Ford Expedition has 63.4 in. of front shoulder room.
The front track of the 2006 Ford Expedition is 5 ft. 6.9 in. (66.9 in.).
On most 2006 Expeditions, the front calipers use a 9MM hex bit while the rear calipers use a 7MM hex bit. 9mm hex bits are not easy to find as singles and will usually only be found as part of large metric hex bit sets. .
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