How can I tell the difference between a 7.5 and 8.8 rear end? Also how can I tell what weather its a traction lock or not and the gears inside without disassembly? I have two rear ends that came with the project 5.0 I'm putting together so I need to identify them. Thanks

 

the housings should have tags attached to them which help identify them. Also, you can compare the housing covers. the 7.5 and 8.8 look different. The 7.5 will be long and not very tall, where the 8.8" is about the same width as the height

 

What adder said was correct. Im looking in the summit book and according to thier reference guide the 8.8 should have two bolt holes in the top and two in the bottom before it curves down where the 7.5 has one in the center and and 1 in each corner. As far as the other question goes, i wouldnt know unless i pulled the back cover off or either it is in a car that has traction control.

 

Tag will look like this 2 L 73 if you have a locker.

 

Thansks. I know one is suspose to be out of a '90 Gt and one out of an '85 Gt. Ill try and find the tags.

 

like night and day looking at them

they will both be lockers if they came out of v8 mustangs

door tag for gears are "ax" code

m=2.73
z=3.08
e=3.27 (aod cars only)

 

http://doug100.com/
this site has some good info on identifying axles. just click the link at the top of the page