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Discussion Starter #1
I have heard that EX trannys are best for boost, and I'm gonna be running alot of it once I get my motor done. but I have an EF and the EX tranny wont fit, so my question is; can I swap all the gears from an EX tranny into my old SI case? is there any difference in the gear ratios anyway? I can get a y8 tranny with axles for $100.. and since my SI one isnt feeling to good anymore I thought this might be a wise decision.. let me know, thanks
 

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Brokedick Millionaire
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40,312 Posts
You Si box is the best, no need to swap gears in..........

The only weakness is the diff pin on the 88-91 trannys.
 
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