2nd Generation Specific 1986-1992 Discussion

slotting drive shaft

Old 04-13-2013, 07:13 PM
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Default slotting drive shaft

so, my rx7 was an N/A when it was stock and i just bought a turbo engine to swap it, so i wanted a t2 driveshaft, and it does not fit onto the diff. What should i use to slot it, just a drill?
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Old 04-14-2013, 10:53 PM
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Default Re: slotting drive shaft

I'm guessing you're asking about mating a TII tranny to an NA Diff. That being the case, you can't use an NA driveshaft as it is too long and the splines won't fit into a TII tranny.

Mazdatrix sells a TII to NA driveshaft, and they show up on this forum and the other RX7 club forum.

If you're trying to mate an NA tranny between a TII engine and TII Diff (a really really bad idea) , you should put the NA diff back in until you can afford to buy a TII tranny.
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Old 04-14-2013, 11:02 PM
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Default Re: slotting drive shaft

sup new to rx 7 world need help tuning etc.
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Old 04-15-2013, 12:39 AM
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Default Re: slotting drive shaft

You should start your own thread, put your detail question there
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Old 04-15-2013, 05:09 PM
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Default Re: slotting drive shaft

NA transmission will be torn apart by the rotating power of the turbo engine, also, clutch and flywheel size are different so look into that as well.

It's usually recommended to mate NA engine with NA tranny, turbo engine with turbo tranny.
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Old 04-16-2013, 10:44 AM
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Default Re: slotting drive shaft

Originally Posted by rx_214 View Post
NA transmission will be torn apart by the rotating power of the turbo engine, also, clutch and flywheel size are different so look into that as well.

It's usually recommended to mate NA engine with NA tranny, turbo engine with turbo tranny.
I'd go one step further in you'd want a TII tranny to any NA engine where the HP was stepped up. The tolerance of the NA tranny is just barely in spec to the power of the stock set up. Syncro's are simply at tolerance limit in an NA tranny.
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Old 04-30-2013, 01:08 PM
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Default Re: slotting drive shaft

i have the t2 engine, tranny, and driveshaft. I have the N/A diff. the holes on the t2 driveshaft don't line up with the holes on the n/a diff. should i drill the holes on the diff to make them line up?
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Old 04-30-2013, 02:00 PM
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Default Re: slotting drive shaft

Unless you take them to a machine shop and have the holes professionally modified, absolutely not.

Mazdatrix sells a TII tranny to NA diff driveshaft. You're just asking for trouble going the route you're suggesting. But you'll be far better off is you just purchase a TII diff and half shafts to complete the set up. There is a reason Mazda engineers didn't use an NA diff in the higher horsepower TII set up.

Last edited by ImHozzmanRX7; 04-30-2013 at 02:02 PM.
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