good info for those who need to up-grade from they're d35 *coughjohnneilcodydougtonycough*
These are the codes you will need when out shopping for your 8.8
Axle tag codes:
3L73 = 3.73 LS
4 10 = 4.10 open
4L10 = 4.10 LS
and so on
Door codes:
43 Open 3200 3.08
41 Open 3200 3.27
42 Open 4.10
46 Open 3.73
45 Open 3200 3.55
D4 Limited Slip 3200 3.73
D2 Limited Slip 4.10
L73 Limited Slip 3.73
Here's all the specs, measurements, and misc crap about the 8.8 you'll ever want to know.
Ford 8.8 specs:
Weight (complete assembly w/ brakes etc.): 174 lb.
Axle shaft strength: 6,500 (lb. ft.)
Drivers side Ford brake hose #:F5TZ-2282-A
Passenger side brake hose #: XL2Z-2282-AA
Bolt size (U-joint flange to yoke) is: 12 x 1.75 x 30 mm
Driveshaft Flange: Spicer Part Number 2-2-1379
Measurements:
O.D. of tubes: 3.250".
Tube thickness: .250" (some are .188"!)
Ring gear diameter: 8.800".
Ring gear bolts: 7/16" dia. (qty. 10).
Pinion diameter/splines: 1.625 / 30.
Axle shaft/splines: 1.320 / 31.
Rotor thickness (where it mounts to axle is .250").
Overall width 59.625" (the F8.8 is .950" narrower then a TJ Dana 35).
Hole diameter for ABS sensor in top of housing: .811".
Centerline of housing to C/L of pinion difference is 3.875" toward the P/S.
Pinion offset: P/S to C/L of Pinion, 27-3/4" (no rotor on axle), D/S to C/L of Pinion, 31-5/8" (no rotor on axle). (this measurement is 2.5" more offset to the P/S then a TJ Dana 35).
all taken from
http://members.cox.net/quanno/ford88.html (http://members.cox.net/quanno/ford88.html)
there are comparison pics to the D35 there as well
also http://www.stu-offroad.com (http://www.stu-offroad.com) has TONS of info... not just on 8.8 axles