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Difference Between 2002 And Turbo 4-Speed Gearbox

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I don't know why I could not reply to your post earlier. The Turbo 4 speed has a larger diameter main shaft, the selector hubs are different and the output flange is different because of a larger diameter spine on the shaft. There are a couple of bearings in the box that are different dimensions but the syncro rings are the same as the standard 2002 4 speed. The strange thing is the optional close ratio 5 speed for the turbo was the same 235 box they used in the standard 2002 they only strengthened the 4 speed. The ratios are the same between the 2 4 speed boxes

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  • 1 month later...

I'm going to update this thread with my experience yesterday. I have a 2002 turbo transmission I'm selling for a friend (see parts for sale). I took Byron's advice that the way to verify it's really a turbo trani is to check that the output shaft has a larger diameter, and thus that the output flange has a larger hole, than a standard transmission. Below is the flange from the turbo transmission put on the output shaft of a Getrag 235. You can see that they both have 27 fine splines, but the hole in the turbo trani's output flange is much larger than the 235's shaft. Thanks Byron!


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