Japanese Rx8 Motor/Gearbox vs American
#1
Japanese Rx8 Motor/Gearbox vs American
Hey all, I rolled the dice on a Japanese engine/transmission pull and I'm very pleased with the result. I put in some urethane mounts, a BHR ignition, a high flow filter, a decat, and it's a whole different car now.
My question is specifically about the gearbox. The throw seems shorter, the stick sits even lower and unless I'm just imagining things the ratios seem a little different. I'm not complaining at all, in fact I think I prefer it.
But I was wondering if there are any design differences between the US and Japan models that might explain the difference in feel.
I'm open to the possibility its all in my head.
My question is specifically about the gearbox. The throw seems shorter, the stick sits even lower and unless I'm just imagining things the ratios seem a little different. I'm not complaining at all, in fact I think I prefer it.
But I was wondering if there are any design differences between the US and Japan models that might explain the difference in feel.
I'm open to the possibility its all in my head.
#3
The fluid was exchanged for a different make also, so there could be a little pressure difference there. It's just that it's a lower mileage gearbox I suppose. Hey, I like it
#4
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The most likely possibility for the shifter height is that you don't have the PPF aligned properly. There is a spec to measure from the transmission to the frame brace to ensure that it's not sagging (which would drop the shifter height)
#6
#9
Besides this, I do feel that there is significantly more torque working up from a stop and that the shift points have moved by a fraction. I'm relatively ignorant though, so this is still in the realm of perception for me.
#12
Boosted Kiwi
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Hmm. Interesting. Cruising on my old USA transmission I would get that signature gearbox noise in 5th. On the Japanese transmission the exact same noise has moved to 6th.
Besides this, I do feel that there is significantly more torque working up from a stop and that the shift points have moved by a fraction. I'm relatively ignorant though, so this is still in the realm of perception for me.
Besides this, I do feel that there is significantly more torque working up from a stop and that the shift points have moved by a fraction. I'm relatively ignorant though, so this is still in the realm of perception for me.
#16
Modulated Moderator
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LOL...you are both correct...it is both
The FD has a pull type clutch..the RX-8 has a push type like the FC
The bellhousing on the 5 speed is much like the FC....and the tailshaft is different to both of the RX-7 trannys. It is beefier than the RX-7 unit and designed to mount up to the RX-8 PPF
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