3.73 LSD on an Automatic (Feedback Please)

[bmwstephen]

So I recently purchased an autotragic 325is. The stock 4.10 differential is on its last legs and I'm starting to look for a replacement differential. I found a good deal on a 3.73. Can anyone with this set up chime in as to how it compares to the 4.10.

[MacBudd541]

So I recently purchased an autotragic 325is. The stock 4.10 differential is on its last legs and I'm starting to look for a replacement differential. I found a good deal on a 3.73. Can anyone with this set up chime in as to how it compares to the 4.10.

Thats how the e30 came until half way through 88. you will be slower off the line and you will know it but with the automatic speed is probably not your 1st choice. you will gain a mpg or 2 on the freeway though.

[nando]

find another 4.10 unless you like punishing yourself. automatics are slow enough as it is. you already have a better overdrive gear and locking torque convertor, so an extra mpg on the highway is moot.