NT Tranny on Turbo Motor Q's

[Mike1992]

Its finally happening, Im picking up a wrecked but driveable 90 Eclipse GS-T next thursday. The car has 120k on it so im gonna pull the motor, toss the turbo tranny. Which im told grinds like a mofo. Im gonna replacing the timing components and remove the balance shafts, new water pump and be set for drop in. The wiring isnt my issue however, my issue is will the Turbo clutch and flywheel fit into my bellhousing of my NT tranny? Or am I gonna have to go get an upgraded NT clutch kit?

 

[Mike1992]

Mavisky where are you?

 

[NitrousBob]

Are you bolting a NA tranny to a turbo engine? Im trying a similar thing right now with a turbo tranny with a n/a flywheel and n/a clutch. Upgraded of course. I have never seen a flywheel with so many cracks as I did when I pulled the turbo stuff apart. Im following this one. I will measure one up today and tell you the thickness.. If they are both the same I dont see why not. The splines are the same. be back in 20

Ok I have measured and they are the same distance from the back of the crank to the fingers where the throwout bearing is. This is FACT. The only difference I have found is that the starter ring gear on a turbo is a little further away from the back of the crank by .060. If there is a starter difference between turbo and NA then thats all you would have to switch. If not your set.

 

[Mike1992]

Interesting Yes I will be bolting a NA Manual transmission to a 4g63t engine. I think Mavisky at one point told me the Turbo Pressure plate, clutch disk and flywheel were thicker as a unit and would not fit into a NA tranmission's bellhousing. I dont quite follow what your saying though. Do you have the means to try out the turbo flywheel, disk and pressure plate and try putting a NA manual trans on? I wanna get this figured out. I have 2 choices, I know the NT flywheel with a heavily upogrqaded clutch will fit in the tranny, but will the turbo setup fit? What upgraded nt clutch are you going with? I dont wanna order a turbo clutch setup only to have it not fit and be screwed out of $300. Another question I'd like to ask of you is should I have the NT flywheel machined at all? I installed a new clutch on this NA motor not 7500 miles ago and didnt machine it and so far its held up fine.

 

[NitrousBob]

Heres what I know the parts are the same thickness with .050 inch of each other. Not enough to bother anything. I measured from the machined surface that mounts to the crank to the area where the fingers touch the throughout bearing. I can check that setup in a few days. I have school all week but on saturday morning I will bolt up a N/a tranny to a block with turbo clutch. Check your turbo flywheel for cracks! Also the n/t flywheels I can get a the local parts house (b&b auto parts in federal way) for 30 brand new. Not much reason to machine as it costs about the same amount. Im not sure about the strength of an N/a tranny. I would try the stock clutch for now and that could save your tranny for a little while. Im working on the differences inside the trannys on my other spare time. as far as clutches go. I will go with a Mcleod clutch disc. they can make any disc up you want and I can see other clutches some people have problems with them holding up and I have never had a problem with mcleod. I dont know which pressure plate I will use it at this point. Im actually in the process of building the engine for my talon.

 

[Mike1992]

Thanks alot man, I think im just gonna go with a NT flywheel though. I talked it over with a friend with a turboed NT and hes using a CAP clutch kit with the NT flywheel and trans on a turbo motor. However for $30 I might be interested in a new flywheel For $30 plus shipping that should equal out to machining costs, new is better to me though. Let me know if you can hook me up. 6 bolt 2.0 NT flywheel plz

 

[Mike1992]

I found the answer The NA bellhousing is to small for the Tuirbo clutch setup as found HERE

Mavisky also states somewhere in that thread that theres a protruding nubby on the end of the turbo crankshaft that must be grinded down to use the NA flywheel.

 

[dave99gst]

From a convo ive had with jon @ TRE i think he saied there are ALOT of diffs froma turbo to n/a tranny

 

[Mike1992]

From a convo ive had with jon @ TRE i think he saied there are ALOT of diffs froma turbo to n/a tranny

From what I've read and learned on here the tranny just has shorter gearing.

 

[NitrousBob]

I will swing by and check the prices.. I let you know or put a link in here after work... Im going to still try it out. I gotta see this not work to believe it. besides I would prefer the n/a flywheel as It doesn't seem to be as prone to cracking. As far as that goes does anyone use the N/a flywheel in a turbo tranny?

 

[mavisky]

Mavisky where are you?

i'm around

the nt tranny is shorter geared, also a little weaker. timg has had issues with his and i'm on my 3rd tranny now. mine have never been that good to begin with though so i don't know if it's really the weakness leading to the failures or not.

 

[donk]

how many has actually made more then stock turbo power on their n/t trannys
i am soon to drop my turbo motor in and since i live in sweden and turbo trannys dont excist here i wil go with my n/t tranny . just woundering since i plan on buying an evo16g later on
regards alfred

 

[Raph]

i'm around

the nt tranny is shorter geared, also a little weaker. timg has had issues with his and i'm on my 3rd tranny now. mine have never been that good to begin with though so i don't know if it's really the weakness leading to the failures or not.

well ive heard people getting tranny problems here..but it seems to be bad luck rather than because of turboing...

i know of three cases..

1)a girl that had her first manual car (and see furbared tha clutch and tranny)
2)a fat guy i used to know..he always used his clutch pedal as a foot rest..furbard clutch..then tranny inputshaftseal broke up and somehow he lost 3rd gear(he just drove till it died) - hye also had bad luck with the car in all..1 tranny rebuild,1 tranny replacement(on warranty),two times headgasket..and the last i heard..his timming jumped on the Autobahn(was doing 200kmh) causing his valvetrain to lie in shreds under his valve cover
he got that done(mitsubishi germany covered 1500 in repairs )then i put in replacement shocks and springs

3) some other chick who also asked me about funny grinding noises..turned out she needed a tranny rebuild a few weeks later..

those are all of the cases ive heard about..

ebven asked the local mitsu(buddy works there now) the mechs said,theyve never had any tranny trouble with this car..hardly anytrouble at all with the dsms (just routine brakes,tires and timingbelt changes..)

and i flog my tranny all the time..so do alot of other guys i know..no problems..so i gues its just a luck issue(i hope )

 

[donk]

ohh a german guy, nice! we swedes often go to germany to buy cheap beer
anyway i heard of some german guy replacing the fifth gear for a higher one , do you know anything about that ?
regards alfred

 

[Raph]

how many has actually made more then stock turbo power on their n/t trannys
i am soon to drop my turbo motor in and since i live in sweden and turbo trannys dont excist here i wil go with my n/t tranny . just woundering since i plan on buying an evo16g later on
regards alfred

hey alfred.. when ur finished..make sure to come to the CarFriday in May on the Nurburg Ring ok?and get some laps in!(best to take someone along who has a RV,since the hotels are pricey(or u have to book by the end of this year)

also..the first Weekend everymonth from May till october are Drag Races held at the old Bittburg Airfeild(motorpark Bittburg)

for Nurburg ring u need 1) a car 2)Ballz 3) a set of tires for the drive home or just bring slicks 4) theres a rule about not being louder than 96db..but they never measure..so...



looking forward to more euro meet ups (and germany seems very central to me..ersp because of the Nurburg Ring)


so,back on topic

oh.btw alfred, ull nered the flywheel off your nt motor to make the nt tranny work..

 

[donk]

sound like alot of fun! when i get the car running i will certanly try to come!
but as you sad..
back to topic
regards alfred

 

[blueman803]

I have both a turbo and non-turbo, clutch, crank, flywheel, and tranny sitting in my garage. I can try and get some pictures up this weekend if anyone wants to see them sitting side by side?

 

[donk]

i know about the flyweel and clutch ( i have a new act clutch lying in my kitchen =) )
i was also planning to replace the syncros before i start her up. have heard so mani diff things about the n/t tranny so i wanted some facts
/alfred

 

[donk]

pics is always nice =)
but my main interest is the n/t trannys capability to handle power
/alfred

 

[mavisky]

timg managed to destroy third gear in his car, and i just pulled mine apart last month and found half of third missing as well. while us fwd'ers love 3rd gear, its our smallest gear in the transmission so it gets eaten up pretty badly if pushed too hard. he was on a 16g trapping around 111mph in the quarter, i was on a 14b trapping around 104 on pump gas.

 

[donk]

ok is this only for the nt tranny or is the turbo tranny as sensetive too?
/alfred

 

[mavisky]

ok is this only for the nt tranny or is the turbo tranny as sensetive too?
/alfred

i'm talking about the nt tranny.

 

[donk]

ok thats not so good =(
but as my economy is at the moment i just have to use the nt tranny until it takes a crap on me ,
the car wont se any track so hopfuly that will help some ??
regards /a

 

[mavisky]

i really think alot of it has to do with how you drive it, my car sits most of the time and only gets driven hard when i get in it. the tranny on mine was fine until i had a small accident and i think that might have caused this failure. i think that on a 14b for the most part any nt tranny in reasonable shape should hold up just fine.

 

[95kate]

um.. maybe i'm wrong but isnt the 4G63 and 4G63-T engines mirror images of each other? on every NT i saw the timing belt, transmission, battery everything was on the other side.