pksjeep Posted January 23, 2011 Share Posted January 23, 2011 I have 1986 Brat. I want to do the 5 speed conversion. The brat has 3.90 gears 1. Is there any way to tell what the 5 speed transmission has for the front differential gears, if you don't have the donor car around? :-\ 2. Do you have to make any modifications to the tunnel area on a non lifted 2nd gen Brat? Quote Link to comment Share on other sites More sharing options...
edrach Posted January 23, 2011 Share Posted January 23, 2011 (edited) As far as I know all the EA82 cars (except turbo models) that you would use as donor vehicles have a 3.900. To be sure check the label on the rear diff to confirm that. Count the splines on the stub axles of the transmission: 23 teeth is non-turbo (3.900) and 25 teeth is turbo (3.700). No modifications to the transmission tunnel are needed. Check (i.e. search) for posts by bratsrus1 for information on doing the 5 speed conversion. Edited January 23, 2011 by edrach Quote Link to comment Share on other sites More sharing options...
edrach Posted January 23, 2011 Share Posted January 23, 2011 (edited) Here's one for you: http://seattle.craigslist.org/oly/pts/2175287412.html Not quite local but you could drive to it. You have two good wrecking yards in town, Spaldings and the pull a part across the street from them. Good luck. Edited January 23, 2011 by edrach Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted January 23, 2011 Share Posted January 23, 2011 (edited) You can count the number of ring-gear teeth through the drain plug hole using a flashlight. 39 = 3.9, 37 = 3.7. There aren't any other ratio's for the D/R here in the US. Depending on how you build the transmission x-member you may have to modify the tunnel. Jerry (bratsrus1) builds a x-member for a very reasonable price ($100 last time I checked) that will just bolt the transmission up without touching the tunnel. The tollerances are very close with a 5 speed in the 4 speed tunnel - without lowering the transmission and rocking the engine backward slightly it will definitely rub. I would just get Jerry's kit as the R&D has been done and we know it works well. GD Edited January 23, 2011 by GeneralDisorder Quote Link to comment Share on other sites More sharing options...
bratsrus1 Posted January 23, 2011 Share Posted January 23, 2011 Hi This is Jerry, give me a call 1-509-952-2855 i can let you know all about the swap over. I live in Selah next to Yakima not that far away. Thanks Jerry Quote Link to comment Share on other sites More sharing options...
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