Getting a differential. need advice

[RedlinedRU]

I was wondering if anyone had a LSD on their e36, and if so, how they liked it, the ratio they went with etc. I want to get the car to hit at least 35mph in 1st if possible with the new diff, but I am concerned with my crusing rpm's on interstate as they are somewhat high right now with my stock open diff. My ideal option would be to swap for the 6spd tranny with the diff, but this is out of my price range at the moment. Any suggestions? Thanks!

98 e36 2.5L 5spd. coupe

[thekid]

The problem of exteremely lowered highway speeds is what has kept me from doing a diff swap. I feel that my car has too many miles and I do enough highway driving that it would be a lot of wear on the car, to have it in that rpm range for the periods of time that I would need. However, I still think that it is a great idea, I am not sure about the ratio's of the tranny and stock diff. However, there is a company that starts with a "q" I believe that sells aftermarket diffs for the 6cly E36's. Only problem is that I remember them being really expensive, around 1.3k I believe.

[Furious]

well i do have LSD but i have a 3:15, looking for a 3:38 but they are very hard to find, im told and have seen that its not a whole huge difference on the highway, when i cruise 140kms i sit at around 3,600rpm, now at the same speed ill be around 4,000ish rpms according to my friend who did his swap, but if your that concerned you can always do the 3:23 swap, its only a 7% increase and really wont affect the rpms as drastically, however they can sometimes be expensive and sometimes not worth the 7% difference in gearing.