Visual Diff. Between 3bolt and 4bolt

[BOOSTIN21]

I am currently looking at a car close by its a 91 TSi AWD with 70k on it and its mint. it has ABS and i know that being the first year with ABS on DSM's some came with it and some didn't ones with ABS had both 3 and 4 bolt rear ends and cars without came with 4 unless i am mistaken. I don't want a 3 bolt so i was wondering if i could crawl under the car and visually tell the diff. between 3 and 4 bolts if there is a diff. what is it what should i look for

 

[-red97rum-]

If the car is in fact a '91 than it has a 3 bolt. Unless the previous owner changed it to a 4 bolt.

Look here for the differences between the two:

http://www.vfaq.com/mods/4bolt.html - about half way down the page there are pics of each. The VFAQ is your friend

-Dustin