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Manual non turbo vs turbo auto transmission

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4.2K views 15 replies 9 participants last post by  Darkfred  
#1 ·
Hi everyone,

I am in the process of purchasing a supra and currently have 2 options; white 1994 manual NA and 1994 Black auto Turbo (same year, similar mileage and same condition).
Which one would you recommend please? Also would you prefer/consider buying an NA and then upgrade it to Turbo or get an auto tranny and possibly convert to manual...or leave as is ;)? Thanks for sharing your thoughts and opinions
 
#3 ·
I'd buy the factory turbo car every time.
There are lots of good manual trans conversion options that'll put you far ahead of trying to turbocharge the NA manual, and then having to upgrade that weak NA W58 5-spd transmission for the higher power.
 
#6 ·
For me personally, I would buy the NA-5spd. I am not really into body work and so all the body work/retrofitting that is required to equip a manual trans is already done straight from the factory. From a financial perspective, NA-5spd would be cheaper so you could have some leftover cash for future plans which is always a plus.

Most of this is all trade-offs. You have to ask yourself what kind of work you want to do vs avoid, and then ask yourself future plans.

Most likely if you were to buy the TT-Auto, you would invest in the T56F trans kit from grannis + plus the extra mods/retrofitting to support a manual trans, but you have the TT engine as a terrific base. In the TT-AUTO case manual retrofit, If you want "OEM", then it will require you to remove the auto tunnel and spot weld the manual tunnel, seam seal, drill holes for the clutch pedal, etc. If you don't care about "OEM", then I think there are like tran tunnel adapter you can bolt on that comes with the T56F kit. With the NA-5sp, you don't have to perform extra body work to support a manual transmission, but drawback is that you have a NA engine. If your future plans is to boost this thing to oblivion, then you are gonna build the engine regardless if you go NA or TT.

Assuming you have a deep desire for the manual transmission, then in the TT-Auto case, you are gonna swap the auto trans for a manual trans and for the NA-5Spd case, you would swap the trans for a stronger manual trans like the T56F for higher power levels. So either case you are swapping the trans.

Just some things to think about.
 
#8 ·
For me personally, I would buy the NA-5spd. I am not really into body work and so all the body work/retrofitting that is required to equip a manual trans is already done straight from the factory. From a financial perspective, NA-5spd would be cheaper so you could have some leftover cash for future plans which is always a plus.

Most of this is all trade-offs. You have to ask yourself what kind of work you want to do vs avoid, and then ask yourself future plans.

Most likely if you were to buy the TT-Auto, you would invest in the T56F trans kit from grannis + plus the extra mods/retrofitting to support a manual trans, but you have the TT engine as a terrific base. In the TT-AUTO case manual retrofit, If you want "OEM", then it will require you to remove the auto tunnel and spot weld the manual tunnel, seam seal, drill holes for the clutch pedal, etc. If you don't care about "OEM", then I think there are like tran tunnel adapter you can bolt on that comes with the T56F kit. With the NA-5sp, you don't have to perform extra body work to support a manual transmission, but drawback is that you have a NA engine. If your future plans is to boost this thing to oblivion, then you are gonna build the engine regardless if you go NA or TT.

Assuming you have a deep desire for the manual transmission, then in the TT-Auto case, you are gonna swap the auto trans for a manual trans and for the NA-5Spd case, you would swap the trans for a stronger manual trans like the T56F for higher power levels. So either case you are swapping the trans.

Just some things to think about.
I'm pretty sure that's the biggest deal anyone's ever made over the MT trans tunnel plate. Hell it's still available new from Toyota.
 
#7 ·
TT hands down.

Much easier to manual swap an auto TT. If you buy the NA 5spd with the intention of going turbo you're going to have to replace that 5spd sooner or later anyway.

That said, we're probably assuming a manual turbo is what you ultimately want here and that might not be the case. Depends on what you plan for the car. There's nothing wrong with an auto and despite some people (outside of Supra circles I find) hanging shit on naturally aspirated Supra's there's nothing inherently wrong with them either. I've owned turbo Supra's in the past and despite my current NA Supra being quite a lot slower I'm still grinning like a Cheshire car every time I take it for a drive.
 
#15 ·
All I would have to do is give you a ride in my 94 MKIV ATF built A340e FTI 4k stall with a ProEFI on E-85 with traction control and you would forget about a manual. Don’t buy an NA when you can buy factory VIN turbo. I’ve own mine for 22 years, 155+ in the quarter and is a pleasure to drive in traffic unlike a stick which is miserable when making decent power.
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