IX Ring and Pinion - is it reverse cut? what diameter?

[mechdonald]

I am working on a project and need to source a reverse cut ring and pinion gear with a small diameter ring gear. Searching for such information is difficult for something other than the typical Jeep/Dana stuff.

Does anyone have this information... or know where I can find it? Or who to ask?

Just to clarify... this is the front axle. And I am looking for a reverse cut ring gear with a diameter less than 7" - preferably around 6.5"


Thanks.

[Wanganstyle]

honda b/d series? b series ran counter clockwise

[mechdonald]

honda b/d series? b series ran counter clockwise

good thinking... but I checked some pictures on Google and they aren't reverse cut. Here is a picture of the layout I need. Note the direction the teeth curve on the ring gear.

I just need a smaller diameter setup than is available in all the North American market off-roading stuff.

I am hoping the E30 IX front R&P will work. The ratio isn't too critical at this point, but something between 3.6x to 4.0x would be nice.

[Wanganstyle]

what about subaru transmission front diff? it has a R&P also and is inside the trans.

or try porsche front diff from AWD 911? one of those guys must be weird, as both engines spin clockwise; one is AWD rear engine, one AWD front engine.

[mechdonald]

what about subaru transmission front diff? it has a R&P also and is inside the trans.

or try porsche front diff from AWD 911? one of those guys must be weird, as both engines spin clockwise; one is AWD rear engine, one AWD front engine.

I just checked with a SubaruGears.com and it looks like we have something. They measured the gear and it is roughly 6.5" OD. I just have to check some other information now to make sure it will work.

Thanks for your help,
Dale

[mechdonald]

Actually, looking more into things, the Subarugears.com stuff is to convert an aircooled VW to use Subaru transmissions. Subarus do not seem to normally have reverse cut R&P. More research required.

[nando]

I *think* ix front diff R&Ps are still cut the same as a rear diff. if you think about it, it's turning the wheels in the same direction, but the diff is just upside down.

I don't know how big it is, but my guess is small. it's smaller than a 168mm R&P for sure.

[mechdonald]

I *think* ix front diff R&Ps are still cut the same as a rear diff. if you think about it, it's turning the wheels in the same direction, but the diff is just upside down.

I don't know how big it is, but my guess is small. it's smaller than a 168mm R&P for sure.

I did some more digging on Google Images. This is from a thread on E30tech. It shows that it is reverse cut. Looks pretty small too.



Getting closer to my answer I hope. What ratios did these come in?

here is the thread

http://www.e30tech.com/forum/showthread.php?t=88325&page=2

[nando]

3.91 and 4.10 are the only ones you're likely to find. you can get a 3.64 and 3.73 but they're euro only, expensive, and rare.

[mechdonald]

I take it that the tooth count on the 3.91 would be 43/11?

[Wanganstyle]

you could also check with the toyota/nissan 4x4 setups

RB25det and DE and Rb26DETT also had a front bolted diff on engine, similar sizing as the BMW stuff.