my 318i is an 84. It has the 3.65:1 gear ratio in the back. i lucked out and got an older model that didn't have the 3.9:1 ratio *sarcasm* lol
so anything sould be fine, i really don't care since it is a daily driver and, i'd rather not spend alot on this car because its not really that great of a car. (condition wise) i love my BMW, and BMW's, don't get me wrong