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Thread: Possible trans upgrade

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  1. #1
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    Ive come across a dogleg 5 speed direct fit. Problem I have is its a 1:1 4th, not 5th. Which means I need to go up in the rearend ratio. Currently have 3.07's and would need at least 3.46's. Starting to think doing a BMW 3.91 diff with LSD would be more of a fun project- however- I need to pick up the VSS signal that currently comes from my current 1994 diff. I need to look into VSS signal sensors- possibly one on the driveshaft near the trans output yoke.

    this venture would mean adapters for the drive plates/ halfshafts, and still probably with anything I do a custom driveshaft. Can't believe how limited factory parts these cars lack- Ive been research possibilities for days now on end. This option would give me the elusive LSD rearend which is a big void with MB cars. here is the ratio comparisons to my current and what it would yield finished.

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  2. #2
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    I came across all the parts I need for a 6 speed swap from a W203 6 sp car in europe. Having everything shipped to me for under $1650 including pedals. Car had 78K on it. I will have a few fitment issues I am expecting, but will work it out and see it I can get the notorious long throw shifting to a little better feel. Cheap enough to experiment with and will certainly be much more fun regardless then what the 4-tronic is.

    Gear ratio is 1) 4.46 2)2.61 3)1.72 4)1.25 5)1.00 6).84
    4tronic ratio is 1) 4.25 2)2.40 3)1.48 4)1

    Also plan to try and use a 3.27 diff in place of my current 3.07

    Here are the comparison in shift rpms and gear top speed for current and then 6sp swap with 3.27's
    Click image for larger version. 

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    Last edited by Vetruck; 06-18-2016 at 11:42 PM.

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