G.I.jonas Posted March 31, 2008 Author Share Posted March 31, 2008 I've read a couple of eg33 turbo threads, it's not that bad to do. The EG and EJ's are similar, but you still want check what works and what doesn't. Not everything does. The SVX's only came in auto, and it wasn't built to handle the NA engine even, They go out all the time. Maybe some of the manual EA boxes fit up? and can have the front's welded up. I don't really recall those details.I have no plan to use the svx trans.But yes the ej transmissions do fit up.This is where im thinking i may go with it.Take a wrx 5 speed which bolts up and weld the center diff which is commonly done to make RWD subarus.The only problem is how much power can they hold like this?? not sure,but judging by some of the outrageous wrx's out there - probably quite a bit.Im thinking at worst i may have to get some beefcake straight cut gears which are expensive or maybe see about getting the stock ej trans gears cryo treated,that should be more than enough either way...i hope Also i have read a single solitary comment somewhere about 3rd gen rx7 transmissions being close enough that you can modify one to fit,this would be ideal and i need to find out if its true. Quote Link to comment Share on other sites More sharing options...
wrxand280z Posted March 31, 2008 Share Posted March 31, 2008 Maybe I'm thinking of the EVO transmission, but I thought all you had to do was remove the front halfshafts and weld the front diff and volia you have a RWD only tranny. Quote Link to comment Share on other sites More sharing options...
G.I.jonas Posted March 31, 2008 Author Share Posted March 31, 2008 Maybe I'm thinking of the EVO transmission, but I thought all you had to do was remove the front halfshafts and weld the front diff and volia you have a RWD only tranny.Yup that is true with the subaru transmissions as well.My only concern as posted above is the possibility that a turboed eg33 may be too much for the trans without improvement. The other fun thing is the fact that you can also do the opposite and voila,you have a mid engine and trans axle Quote Link to comment Share on other sites More sharing options...
Pete84 Posted March 31, 2008 Share Posted March 31, 2008 Also i have read a single solitary comment somewhere about 3rd gen rx7 transmissions being close enough that you can modify one to fit,this would be ideal and i need to find out if its true. Mention it, and I vaguely remember reading a letter to some import magazine asking how to convert a Subie, pre turbo series, to RWD. Mention of a RX7 transmission was in there. Man, I just can't find anything with google. Anyone have any luck? Quote Link to comment Share on other sites More sharing options...
firm Posted March 31, 2008 Share Posted March 31, 2008 Here's a quick thread that I found on www.nasioc.com . http://forums.nasioc.com/forums/showthread.php?t=1290927 I would say that your best bet would be to search around that site to see what you could find since those guys will do anything to their cars. They not only mention using an rx7 tranny with a modified driveshaft, but they mention the use of an r200. I've found quite a bit of info on there over the years when helping my buddy with his sti, so I'm sure that you can find some info there to help you out with this endeavor. [edit] I'm just going to update this post with any more threads I can find for converting a subie to rwd, so feel free to check back with it. http://www.clubwrx.net/forums/showthread.php?t=27532 .. hmmm http://www.subarureview.com/showreview.php?id=1336 A $350 RWD conversion kit for subies? Found this link on another forum: http://www.rocketrally.com/website/index.php?option=com_oscommerce&osMod=index&cPath=40_182 They have a subie AWD - RWD conversion "kit" that seems to work on either wrx 5 spd or sti 6 spd trannys. Quote Link to comment Share on other sites More sharing options...
Pete84 Posted March 31, 2008 Share Posted March 31, 2008 Considering that OP is looking to put this in a Z, I'm guessing that the RX7 Turbo II transmission job is probably the way to go. Just need more info, but I'm tired of reading Quote Link to comment Share on other sites More sharing options...
firm Posted March 31, 2008 Share Posted March 31, 2008 ^I would think that too, but at the same time it might be a bit cheaper to stick with the subie trans if possible. I don't know though to be honest, I guess more reading is in order. I'm off the clock though so someone else is up, lol. Quote Link to comment Share on other sites More sharing options...
CArFAn Posted March 31, 2008 Share Posted March 31, 2008 Heh, my dad just bought a svx 2 days ago. Quote Link to comment Share on other sites More sharing options...
Shift Posted March 31, 2008 Share Posted March 31, 2008 Just thinking about. Wouldn't be easier to just get a rwd tranny from any make and making an adaptor plate or modding the bell housing? Quote Link to comment Share on other sites More sharing options...
G.I.jonas Posted March 31, 2008 Author Share Posted March 31, 2008 Just thinking about. Wouldn't be easier to just get a rwd tranny from any make and making an adaptor plate or modding the bell housing?Sure.But it seems to me that there must be something about the rx7 that makes it fairly easy.Now that i have seen multiple posts regarding this being done i am definitely going to put my attention there.Those transmissions aren't that hard to find and there is no doubt that they are more than strong enough. What i need to find out i whether it would be easier to modify the rx7 bell housing to fit the eg block or use the subaru bell housing and modify it to fit the rx7 trans? Oh,and good finds there Firm!!! Quote Link to comment Share on other sites More sharing options...
SHO-Z Posted March 31, 2008 Share Posted March 31, 2008 How about a 944 Porsche trans, they can handle a chevy V8. Use the suspension off of a factory 5 cobra on the front end and large flares all around. Quote Link to comment Share on other sites More sharing options...
G.I.jonas Posted March 31, 2008 Author Share Posted March 31, 2008 Aren't 944's front engine rear transaxle?? I guess actually that would be pretty sweet,however i am looking at enough work already. Quote Link to comment Share on other sites More sharing options...
Gollum Posted March 31, 2008 Share Posted March 31, 2008 Well regarding the AWD system... Ahh you know I'm just kidding. I think your best option will be converting the subie system to be RWD only. I'd imagine it'd survive a Z car's weight as long as you weren't putting HUGE sticky tires on it... Are you? (kind of a stupid question I know, it should be more a question of when) The only downside, isn't the subie transmission going to be kinda big and heavy being an AWD design tranny? One of my best friends just bought a STI (first year in the US, was that 04' or 05'?). I can't wait to get to his shop so I can see it on a lift. Thing MOVES amazingly well, though the motor feels way rougher than I'd have thought it'd be. Kinda nice though. Quote Link to comment Share on other sites More sharing options...
Pete84 Posted March 31, 2008 Share Posted March 31, 2008 For this entire thread, I was thinking that the WRX engines were transverse. Than last night I realized that they are longitudinal. http://www.i-club.com/forums/showthread.php?t=4487 Not sure how much of that is dedicated to the AWD system, but the 5sp definately looks fairly narrow, but long. http://album.hybridz.org/data/500/7338_1.JPG http://album.hybridz.org/data/500/0943_10mg.jpg Just looking at the transmission internals, it looks like the bottom right is the output for the FWD, and the bottom left is the RWD bit. All on the same shaft. Besides snaping or de-splining the output shaft, what link links might there be with a RWD converted transmission? Yes, it has the extra bulk of the AWD component, but it doesn't appear to add too much. If the RX7 transmission takes alot of custom parts to work, a RWD conversion might be a good way to go. Quote Link to comment Share on other sites More sharing options...
dig280z Posted March 31, 2008 Share Posted March 31, 2008 Very nice man cant wate to see it in the car and see what it puts down! Quote Link to comment Share on other sites More sharing options...
G.I.jonas Posted March 31, 2008 Author Share Posted March 31, 2008 I think your best option will be converting the subie system to be RWD only. I'd imagine it'd survive a Z car's weight as long as you weren't putting HUGE sticky tires on it... Are you? (kind of a stupid question I know, it should be more a question of when) Yes i will have huge sticky tires.In case you didnt notice i am the same guy who widened his car by 3" per side Im pretty sure the rx7 thing is where im going to start my research,at this point i have very little faith in the sube trans holding up after conversion.Most people who do this do it to drift and tire spinning isn't too hard on a tranny.That and i have a friend with an older souped up wrx and he has managed to noodle the input shaft on the same trans i would be using with only 265 hp - now picture two extra cylinders,sticky tires,turbos,and the fact that all torque has to escape via the rear rather than to all 4 in normal form:rolleyes: Quote Link to comment Share on other sites More sharing options...
CarJway Posted April 1, 2008 Share Posted April 1, 2008 There are quite a few guys in the Subie crowd that have switched over to a RWD platform. From the content of your posts, I assume you want a manual transaxle? If not, a quick search gave me this... Adapter Plate I have a few more links to convert to a manual and automatic transaxle, but there on my home machine. I will post some more information later today/tomorrow... Quote Link to comment Share on other sites More sharing options...
G.I.jonas Posted April 1, 2008 Author Share Posted April 1, 2008 Damn!! nice link,i may have to call them and get a ball park on some of my ideas. Quote Link to comment Share on other sites More sharing options...
Pete84 Posted April 2, 2008 Share Posted April 2, 2008 Would you be able to use that TH400 adapter plate with, say, a Muncie 4 speed? Quote Link to comment Share on other sites More sharing options...
G.I.jonas Posted April 2, 2008 Author Share Posted April 2, 2008 I was wondering that myself! Why would it be proprietary to the th400? i dont understand that. Quote Link to comment Share on other sites More sharing options...
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