JDM vs US tranny differences?

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Originally Posted by CoreyB

And ONLY if a 6 Speed. Did the OP specify 6 speed and I just missed it?

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I'm still missing it.... What year car are we talking about?

sorry it's a 6sp i'm asking about.

As stated above transfer case is the same. Rear differential ratio is the same as the 5 speed so change tail shaft and diff is easier than opening the box to change front diff. That will also most likely void any warranty you have on it.

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Thanks CoreyB

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Originally Posted by GTOJOE

As stated above transfer case is the same. Rear differential ratio is the same as the 5 speed so change tail shaft and diff is easier than opening the box to change front diff. That will also most likely void any warranty you have on it.

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you don't have to change the "driveshaft", just the rear end.

ok thanks guys, lastly how would you know for sure that your transmission is bad, and how would you know if your transfer case is bad as well. My transmission grinds 2nd and 4th when shifting at about 3k rpm and above and when down shift into 2nd, so is it for sure that it is bad?

By the way, i haven't purchased anything yet. I'm asking this so i would know which route to take and which route would be more cost effective. Thanks again

Sounds like all you need is new syncros, get some quotes from reputable 3S shops that work on these gearboxes (Ninja, GZP, 3SX, Jacks, Kormex etc).

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Originally Posted by Forest Gump

you don't have to change the "driveshaft", just the rear end.

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I was of the understanding that you need to change the last half of the tail shaft/drive shaft. Obviously he would need a jdm diff or a 5 speed one.

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The difference in the driveshafts is only like 3/4". You can use either in either in a pinch and even on a 13t car launching hard no issues were had, other drivetrain parts break before you can strip out the yoke.


BTW, it's the front section that's different.

Quote:

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Originally Posted by GTOJOE

I was of the understanding that you need to change the last half of the tail shaft/drive shaft. Obviously he would need a jdm diff or a 5 speed one.

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That is not true. The mounting flange and everything else about the rear 2 sections of the shaft is the same. I'm running a 6 speed rear section in my 5 speed car right now.