Rear Diff

[Nik0las]

Hi,

Is there any difference between S2 rear diff and 7A diff. I know the ratio is the same, but i'm wоnder is it S2 stronger?

[AndyP]

AFAIK it's just the output flanges that are differnent and you can swap those of your S2 diff. I know a lot of people try to get a 7A diff because it will have had an easier life.

[PeteUr]

AFAIK it's just the output flanges that are differnent and you can swap those of your S2 diff. I know a lot of people try to get a 7A diff because it will have had an easier life.

Also afaik if you get 7a rear driveshafts as well they are thicker than normal s2 one's for some reason.

[speeding-g60]

the size of the axle flanges and the breather is all the differences ETKA shows.

seems the 4cyl ones got 90mm flanges, the CQ N/A got 100mm flanges, and the 3B/ABY (turbo i would surmise) has 108mm. i cannot confirm firsthand this info, it came from ETKA and we didnt have turbo or 4cyl Coupe Quattro in USA. but i have an S2 diff (3B/ABY) with 108mm flanges i had sent from Europe, and i have a couple CQ here in the states. and from what i see they are identical, flanges notwithstanding.

[dominator]

I think Nik0las means that if he can fit s2 gears without changing the rear diff.

[speeding-g60]

i read it to ask if there is any difference in the two. like is an S2 rear diff stronger than a 7A rear diff. and there is not. they have the same part numbers for all internals for each, S2 and Coupe Quattro with 7A.

so putting in S2 gears into a 7A diff is pointless as they are the same parts, unless one is damaged.

and they do both have the same 4.11:1 final drive, as well.

[PeteUr]

s2driveruk on here is running a 7a diff in the place of his 7a

[dominator]

You are right!Thank you!

[Kieron20V]

s2driveruk on here is running a 7a diff in the place of his 7a

Impressive

[s2driveruk]

yep, he is well running might be a stronger word than i'd use but it has been used on the car. Change the output flanges and away you go.

[s2driveruk]

dont know if they help but remembered i had a few images from when Pete and I changed it over couple of years back:









believe me, it dont smell good in there

[S2central.net]

gear oil don't half hum alright - LOL

[Error404]

Impressive

[s2driveruk]

for what i am capable of with a spanner....it was!

[Error404]

what happened to the diff lock ring BTW David? Is that why you changed the diff?