Underdog Posted January 29, 2015 Share Posted January 29, 2015 Hardly impossible - V3/V4 JDM STI came with the 5MT and DCCD center. Here is mine, picked up used off NASIOC. Just cleand and rebuilt with new shifter arm and prop shaft oil seals. Need a few bolts and to repair one of the wires coming through the potted feed-thru and it'll be ready to go. The Crimson Dynamo Link to comment Share on other sites More sharing options...
frank_ster Posted January 29, 2015 Share Posted January 29, 2015 yea but i doubt you can mod a 5mt to dccd ? Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
Underdog Posted January 29, 2015 Share Posted January 29, 2015 Do you not see the DCCD center diff assembly bolted on to my 5MT in those pictures? The Crimson Dynamo Link to comment Share on other sites More sharing options...
frank_ster Posted January 29, 2015 Share Posted January 29, 2015 oh i thought it was a different case or something .. meaning you got the whole tranny from a 5 mt sti. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
Underdog Posted January 29, 2015 Share Posted January 29, 2015 Nope - the USDM LGT 5MT gear set and case are the only original parts. The three diffs are the helical front, DCCD center, and Suretrac rear; all JDM WRX/STI take-offs. The Crimson Dynamo Link to comment Share on other sites More sharing options...
frank_ster Posted January 29, 2015 Share Posted January 29, 2015 nice ! but $$$ sucks having to buy a car and then change all that stuff.. why cant you just buy a track ready car ! Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
Underdog Posted January 29, 2015 Share Posted January 29, 2015 Planning and installing is at least half the fun! Comes in considerably less than a 6MT swap and i got to keep my gearing; I like this spacing, and I am the only driver on these gears. It helps doing the labor if you ignore the cost if the tools. The Crimson Dynamo Link to comment Share on other sites More sharing options...
nm Posted January 29, 2015 Share Posted January 29, 2015 What did the DCCD diff cost? What, if any mods are needed to bolt to a USDM 5MT or does it just bolt up? Basically, deets. Link to comment Share on other sites More sharing options...
Underdog Posted January 29, 2015 Share Posted January 29, 2015 I paid $500+shipping for mine on NASIOC but they are vanishingly rare to come by and I really don't know if that is what you should normally expect to pay. It bolts right up to the USDM 5MT. Spline count and diameters are the same, and so is the bolt pattern. It has a 35:65 torque split and I will be controlling the lockup with the mapDCCD controller. More pictures and details in a separate thread once the car is complete. The Crimson Dynamo Link to comment Share on other sites More sharing options...
whitetiger Posted January 29, 2015 Author Share Posted January 29, 2015 5mt DCCD is a unicorn! super rare stuff direct from japan. You basically have the complete drive-line from a V3/V4 JDM STI but with a 4.11 final drive and the taller stronger LGT gears. I think you are the only one in the US with this setup now. Link to comment Share on other sites More sharing options...
Underdog Posted January 29, 2015 Share Posted January 29, 2015 Looking at the Rallispec transmission chart, it looks like it is closer to the V5/V6 (MY99-00). The helical front and DCCD center were used on the V5/V6 JDM STI R/RA/S201 and the Suretrac rear was used on the "regular" V5/V6 JDM WRX & STI. Like you said - those came with the 4.444 FD and I am using the stock 4.111. The USDM LGT gearing is identical to the JDM V3/V4 STI (and many others). The Crimson Dynamo Link to comment Share on other sites More sharing options...
whitetiger Posted January 29, 2015 Author Share Posted January 29, 2015 yeah, and nobody has put this combo in a 4th gen LGT before. Link to comment Share on other sites More sharing options...
rapture Posted January 29, 2015 Share Posted January 29, 2015 Underdog, thats awesome! Link to comment Share on other sites More sharing options...
TexasLegacy2.5GT Posted January 31, 2015 Share Posted January 31, 2015 nice ! but $$$ sucks having to buy a car and then change all that stuff.. why cant you just buy a track ready car ! You have to have a passion for it son. I really cant believe that I read that comment on this Legacy board. It's the journey of building a car that makes it all the more sweet. Link to comment Share on other sites More sharing options...
frank_ster Posted January 31, 2015 Share Posted January 31, 2015 Yea i know. But you dont use a 1/4" ratchet in place of a 3/8" . You can but its gonna break. You can spend money on shot pene and cryogenic treatments but its still no 3/8" ratchet. I know i am the lst person to be saying this ! But im looking at the numberes i just of just bought a spec b to start with. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
Underdog Posted January 31, 2015 Share Posted January 31, 2015 Hey are you calling my 5MT a 1/4" drive ratchet?! I've seriously considered the 6MT but in the final analysis I decided to stick with this gear box and a few upgrades. If I lose a gear then I'll reconsider. The Crimson Dynamo Link to comment Share on other sites More sharing options...
Arcteryx Posted July 21, 2018 Share Posted July 21, 2018 There is no Quaife unit that is compatible with the stock LGT axles. I know this is a (very) old post, but is this still the case? I can get a screaming deal on a brand-new Quaife QDH3Y, and just wanted to check whether it would work with my Spec B 6-speed transmission. It seems like it should if it's made for the STi 6-speed...since you can swap an STi 6-speed transmission straight into an LGT without changing the front axles, I don't see why LGT front axles wouldn't work with a diff made for a 6-speed STi transmission. Also, any idea how many hours of labour I'd be looking at to get a shop to do the install with the tranny in the car? I know with the 6-speed transmissions you just have to remove the bellhousing rather than split the case. Link to comment Share on other sites More sharing options...
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