rear axle (diff cover, ring gear bolts, and RABS sensor bolt, along with the brake backing plate bolts), wheel studs, 2.3 starter power wire (on a metric engine having a single bolt with a 3/8" head makes sense...).
That's all I can come up with right now, but at least ford liked to use the same size for nearly everything, most metric fasteners have 13mm heads which work with 1/2" tools, wish they would have made the 18mm stuff 19mm so that 3/4" tools would work on them...
I don't know about YOUR Axle, but my 8.8" axle has metric cover bolts.
Or atleast The english 5/16" tap I tried to use to chase the
threads wouldn't fit... 8x1.25 with 13mm heads...
The Ring gear bolts true. The diff carrier bearing cap bolts as well.
the Rabs sensor bolt? No.
Ready?
1) Radius arm to beam bolts 3/4-10 thread with 1-1/8" heads
2) Radius arm bushing nuts 3/4-10 thread also 1-1/8"
3) Coil spring retaining stud (and nut) 5/8-11 thread head
size is either 1-1/8" or 15/16"
4) FRONT drive shaft U-joint to diff flange 1/4-28 thread T-30 head
(the 7/16" head isn't useable because the strap is too close)
5) FRONT drive shaft bolt to t-case flange (13-54) 5/16-24 thread
5/16 12-point (8mm wrenches work)
6) Manual T-case shifter pivot Bolt 9/16-12 thread 1-1/8" head
7) Manual T-case shifter gate adjustment lock screw
3/8-16 thread 9/16 head.
8) IF your truck is 1994 or earlier the VSS or speedometer drive gear is retained in the trans (2wd) or T-case (4x4) by a 1/4-20 screw with
a 7/16" head.
9) Brake Backing plate retaining screws 3/8-24(fine) with 9/16" head
and nut
10) Supercabs with TWO PIECE rear driveshaft the U-joint strap bolts
are 1/4"-28 thread
11) Rear wheel Cylinder bolts vary 1/4-20, 5/16-18 or metric
(usually 8mm) depending on manufacturer.
12) 1983-97 to hold the steering box to the frame, the
bolts are 7/16-14 thread with 5/8" heads
13) On Supercabs the rear window is retained with nuts that
most people think are 9mm, they are not, they are really 11/32"
as that is the standard size nut for the 8-32 threaded studs
they thread onto.
14) on EARLY Gen1 Rangers the 13-50 T-case is mounted with
3/8-16 thread english bolts, but by '85 or '86 Dana switched to
10x1.5 Metric bolts.
Yes, the studs on the starter solenoid are 5/16-18 and use
an oversized 9/16" nut, but that's largely because ford hasn't
changed that part materially since before most forum members
were born.
I don't think I missed any, but I could be wrong...
AD