N/A Transmission on turbo engine

[dsmputz]

I want to utilize my 6 bolt n/a tranny on my turbo swap. Being that the gears are shorter I could probably run faster times with it. Has anyone out there ran 300 or more ponies through the non-turbo tranny without complaints? Also I called around to get my tranny rebuilt and the guy at the shop said that it would cost a furtune because they need to do a bunch of upgrades that mitsubishi came out with after my tranny was built ( I have a 1993 talon es). Has anyone heard of these upgrades before?, I know that 1G dsm trannies were notchy from the factory but i've never heard about updated parts after 93.

Rob

 

[Duke901]

I think if you use the N/t tranny you wont beable to use the turbo flywheel or clultch, You will have to use the N/t flywheel and clutch. With the N/t clutch, i dont think it will be good enough to with stand 300 plus HP.

 

[fourreGsixty3]

The turbo'd tranny's are much stronger then the n/t tranny's. If the only reason you want the n/t tranny is for the gearing ratio's then why not ack a tranny company if they could built you a GST tranny, but use the n/t tranny gear ratio's. Also if you search around a bit you can find plenty of threads on this subject, I remember posting a few times in on of them, but forget the threads title.

Dustin

 

[nightspeed87]

theres been some different opinions on this, ive even spoken with two different mitsu reps about it and both had valid but different opinions, but utimately said that it wont work on a modified car. On the contrary I know a guy with an automatic n/t tranny and he said its held up fine for a while now with decent power mods, but then from another source on the manual tranny ive heard it fails to support even a fairly modified dsms horsepower, so id imagen too much beyond the stock 4g63T hp and it will fail,and it could be a horrible thing to hear and deal with while your racing your car and have your tranny blow up on you and get left on the side of the road.
The n/t trannies gear ratios are a lot better 1st- 3rd for better quater mile times, ( I dont know the differences in times though ) but the gears arent geared as high for the top end side... You cant use turbo flywheel or clutch, but you can get the highest upgrade n/t clutch that will be able to handle even more than the tranny itself can handle, ( which if you did retain the n/t tranny you HAVE to upgrade clutches at least) Another thing is, most aftermarket tranny builders and supporters (like shepherd for example) wont work in the n/t tranny.... If your on a tight money budget its understandable, but I think it is a risk that youd have to find out on your own if it will work or not, but utimately if your about performance; youll see you will need the turbo trans...

 

[Auto RS T]

The swap wont work unless you use a n/t clutch and flywheel like duke901 said.

However I am curious if you put a performance n/t clutch in, if it could hold the power, maybe you should try this and let us know how it goes

 

[Gs Dewd]

Can't speak for the 5sp n/t tranny's but my n/t auto has held just fine with mods. And I have put just about 23,300 miles on the car since the swap. I have also heard that the n't and gst trannys are pretty much the same as far as strength.

 

[dsmputz]

I have also heard that the n't and gst trannys are pretty much the same as far as strength.[/QUOTE

I've heard that quite a bit searching through the web. But then there's some people saying that the turbo tranny is built that much stronger, so I don't know who the hell to belive anymore. What I need to do is go ahead and call the guy who designed them. He probably lives in japan somewhere, anyone have his number???

 

[Gs Dewd]

I was told by a few people that they are the same in strengh including the folks at ipt. I know they build at trans but they would know aomething about manual trans to. And there aopion is that if you want a tranny that will last get a built 5 spd or go with an auto tranny.

 

[dsmputz]

well then, I think i'll guinea pig it and rebuild my n/a tranny. I have 4 grande to dump on my engine so whatever amount of HP that gives me will be the trannies test.
thanks for all your replies

 

[Andrew7DG]

DON'T USE THE N/T TRANSMISSION!!!!!! just ask Mavisky (he has done the swap and went through a couple of N/T transmissions before he figured it out) do a search and there is a video of him breaking a freshly rebuilt N/T transmission

I have thought about this as well and found info on why it isn't a good idea. If you ever want to make more horse power this is the limiting factor. The transmission will not hold up to the higher horse power that the Turbo engine produces. The gears are a lot thinner then the turbos transmission. When the high horse power is produces you will strip these gears for sure. The best way to deal with this is get a manual transmission from a turbo model. They are beefier, clutch and flywheel are bigger, SHEP WILL REBUILD THESE. The other thing that you have to buy is the engine mounts and transmission mounts because they are different something with one sets the engine back farther (i forget which)

It would be a waste of time to go with a N/T

unless..

you kept the stock horsepower in the turbo engine

however how many of us can resist making more power

 

[dsmputz]

DON'T USE THE N/T TRANSMISSION!!!!!! just ask Mavisky (he has done the swap and went through a couple of N/T transmissions before he figured it out) do a search and there is a video of him breaking a freshly rebuilt N/T transmission

I have thought about this as well and found info on why it isn't a good idea. If you ever want to make more horse power this is the limiting factor. The transmission will not hold up to the higher horse power that the Turbo engine produces. The gears are a lot thinner then the turbos transmission. When the high horse power is produces you will strip these gears for sure. The best way to deal with this is get a manual transmission from a turbo model. They are beefier, clutch and flywheel are bigger, SHEP WILL REBUILD THESE. The other thing that you have to buy is the engine mounts and transmission mounts because they are different something with one sets the engine back farther (i forget which)

It would be a waste of time to go with a N/T

unless..

you kept the stock horsepower in the turbo engine

however how many of us can resist making more power

Thanks Andrew, you just saved me a whole lot of swearing down the road. I guess it's off to a salvage yard to find the turbo tranny.

 

[nightspeed87]

DON'T USE THE N/T TRANSMISSION!!!!!! just ask Mavisky (he has done the swap and went through a couple of N/T transmissions before he figured it out) do a search and there is a video of him breaking a freshly rebuilt N/T transmission

I have thought about this as well and found info on why it isn't a good idea. If you ever want to make more horse power this is the limiting factor. The transmission will not hold up to the higher horse power that the Turbo engine produces. The gears are a lot thinner then the turbos transmission. When the high horse power is produces you will strip these gears for sure. The best way to deal with this is get a manual transmission from a turbo model. They are beefier, clutch and flywheel are bigger, SHEP WILL REBUILD THESE. The other thing that you have to buy is the engine mounts and transmission mounts because they are different something with one sets the engine back farther (i forget which)

It would be a waste of time to go with a N/T

unless..

you kept the stock horsepower in the turbo engine

however how many of us can resist making more power

basically what iwas saying in my post-

theres been some different opinions on this, ive even spoken with two different mitsu reps about it and both had valid but different opinions, but utimately said that it wont work on a modified car. On the contrary I know a guy with an automatic n/t tranny and he said its held up fine for a while now with decent power mods, but then from another source on the manual tranny ive heard it fails to support even a fairly modified dsms horsepower, so id imagen too much beyond the stock 4g63T hp and it will fail,and it could be a horrible thing to hear and deal with while your racing your car and have your tranny blow up on you and get left on the side of the road.
The n/t trannies gear ratios are a lot better 1st- 3rd for better quater mile times, ( I dont know the differences in times though ) but the gears arent geared as high for the top end side... You cant use turbo flywheel or clutch, but you can get the highest upgrade n/t clutch that will be able to handle even more than the tranny itself can handle, ( which if you did retain the n/t tranny you HAVE to upgrade clutches at least) Another thing is, most aftermarket tranny builders and supporters (like shepherd for example) wont work in the n/t tranny.... If your on a tight money budget its understandable, but I think it is a risk that youd have to find out on your own if it will work or not, but utimately if your about performance; youll see you will need the turbo trans...

 

[DarkSwatCobra]

, gotta love the rewording!