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|3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.|
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I have a question: I changed the differential in my 325, the one I put makes the car quicker now but I don't have top speed anymore, I can only reach 210 km/h. My question is, is there a chip for my transmission that can change the ratio without having to open the transmission itself. I have a manual transmission by the way.
i bet u put a 318is diff on aint you! gives u hell of a lot on pull off but nuffin top end! that diff will just snap on you! get it off put ur 325i back on ASAP
If you want higher top speed get a numerically lower diff. You can get as low as 2.79 rear ends for e36's without going custom. This WILL kill your acceleration, and I'd only recommend something that low if you are forced induction of some sort. A 3.15 is about as low as I'd go with any naturally aspirated e36, it'll top out at roughly 160-167mph(270kph) depending on which transmission (zf or getrag) your car has and if it has sufficient top end power.
With my stock ZF S5D 310Z transmission in my 95 m3 with a chip i've hit an indicated 165mph with the stock 3.15 rear end.
A 3.46 is a good combo to get if you can find one, it accelerates a noticeable amount quicker than stock but will still top out at around 130-140mph(225kph) at redline.
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