NA and turbo II drivetrain differences: documentation and pictures
10-04-04, 12:52 AM
#1
NA and turbo II drivetrain differences: documentation and pictures
Pics will load, theyre just slow. For now this writeup is hosted on my web server, later it will be integrated into the website tech area, so dont bookmark it just yet.
www.rotaryresurrection.com/klinternetfiles/na-t2drivetrain.htm
www.rotaryresurrection.com/klinternetfiles/na-t2drivetrain.htm
10-04-04, 12:53 AM
#2
1991 Frankin7 ***RIP***
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awesome, glad to see some pics and info on this for once. up till now its all been alot of "he said, she said" kinda info about these trannies.
10-04-04, 09:24 AM
#4
Rotary Enthusiast
Kevin,
Great write-up. Thanks for the time and effort.
Just one thing I'd like to point out that wasn't discussed: The NA Automatic driveshaft. The Automatic driveshaft has the the same splines as the the Turbo transmission but has the bolt pattern of the NA rear diff.
So using the Automatic driveshaft allows for a hybrid installation of a Turbo Transmission with an NA rear end. This isn't the best way to go for delivering Turbo power to the wheels, but is an option for those who have 4.3 gears in the rear.
Great write-up. Thanks for the time and effort.
Just one thing I'd like to point out that wasn't discussed: The NA Automatic driveshaft. The Automatic driveshaft has the the same splines as the the Turbo transmission but has the bolt pattern of the NA rear diff.
So using the Automatic driveshaft allows for a hybrid installation of a Turbo Transmission with an NA rear end. This isn't the best way to go for delivering Turbo power to the wheels, but is an option for those who have 4.3 gears in the rear.
10-04-04, 10:15 AM
#7
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Originally Posted by wozzoom
Just one thing I'd like to point out that wasn't discussed: The NA Automatic driveshaft. The Automatic driveshaft has the the same splines as the the Turbo transmission but has the bolt pattern of the NA rear diff.
So using the Automatic driveshaft allows for a hybrid installation of a Turbo Transmission with an NA rear end. This isn't the best way to go for delivering Turbo power to the wheels, but is an option for those who have 4.3 gears in the rear.
So using the Automatic driveshaft allows for a hybrid installation of a Turbo Transmission with an NA rear end. This isn't the best way to go for delivering Turbo power to the wheels, but is an option for those who have 4.3 gears in the rear.
See more comparisons here:
http://www.16paws.com/rx7/index.html
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10-04-04, 10:57 AM
#8
Super Raterhater
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Correct, it's fine for if you ABSOLUTELY must move the vehicle/drive it to/from work, but under no circumstance should you even think about beating on it.
10-04-04, 11:20 AM
#10
i am legendary
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I've heard this said on the forums numerous times and wanted to know if there is any truth to it. It's been said that an aftermarket flywheel meant for a turbo will work with the N/A tranny if you use a TII pressure plate, or something like that. Is this true?
10-04-04, 12:18 PM
#11
Rotary Enthusiast
Originally Posted by Evil Aviator
Since the Automatic transmission is longer than the Manual transmissions, the Automatic driveshaft is 2" shorter, and trying to use it in this manner is dangerous.
See more comparisons here:
http://www.16paws.com/rx7/index.html
See more comparisons here:
http://www.16paws.com/rx7/index.html
10-04-04, 12:50 PM
#12
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Originally Posted by wozzoom
Good link. I've heard of people using the automatic shaft with the turbo trans...They must have had a custom shaft made.
Mazdatrix makes a custom driveshaft that mates a TII transmission to a NA differential, and sells for about the same price as a regular NA or TII driveshaft.
http://www.mazdatrix.com/getprice.asp?partnum=2691-000
Originally Posted by dDuB
I've heard this said on the forums numerous times and wanted to know if there is any truth to it. It's been said that an aftermarket flywheel meant for a turbo will work with the N/A tranny if you use a TII pressure plate, or something like that. Is this true?
10-04-04, 02:36 PM
#14
Lives on the Forum
You might want to mention the turbo clutch fork is thicker and directly swaps for the non-turbo unit.
"Clutch fork upgrade" for your non-turbo manual trans.
Credit goes to hIGGI for figuring this out.
-Ted
"Clutch fork upgrade" for your non-turbo manual trans.
Credit goes to hIGGI for figuring this out.
-Ted
10-05-04, 01:00 AM
#19
Lets rock.
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Ok if this helps any. I did a 5 speed swap on my '89 GXL. I went with all TII components (slave cyl, Light flywheel w/ auto counterwieght, TII trans, TII shaft, auto rear end) but when I lined up the TII shaft with the N/A rear I lined it up perfectly and drilled new holes for the larger shaft. However when you do this it puts the holes very close to the edge of the flange. But it worked perfectly.
10-06-04, 11:19 AM
#20
S4 now S6 soon...
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Here is a question, I was just looking through the standard features thread, and I noticed the Convertable tranny has some different ratios(namely 5th) anyone know if it's layout on the inside is any different, or is it the same NA tranny with one different gear? Might be good to know for the people that have already spent money on an NA flywheel/clutch.
10-06-04, 11:31 AM
#21
ALL of the NA trannies regardless of model or gear ratios, are the same gearbox. Common misconceptions are that the factory sport models (88 GTU, 89-90 GTUs) have turbo drivetrains, this is NOT true. All nonturbos have the standard smoothcase transmission which is just as weak...just different ratios sometimes exist.
10-06-04, 12:09 PM
#23
Mountain Rotary Mod
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Awesome writeup! Very informative!
While i still plan on using my NA drivetrain on my project, I will probably start to pick up turbo parts when i have some extra cash.
....after my rebuild project is complete of course!
While i still plan on using my NA drivetrain on my project, I will probably start to pick up turbo parts when i have some extra cash.
....after my rebuild project is complete of course!
10-06-04, 12:11 PM
#24
Eat, sleep, work, mod.
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Originally Posted by RotaryResurrection
ALL of the NA trannies regardless of model or gear ratios, are the same gearbox. Common misconceptions are that the factory sport models (88 GTU, 89-90 GTUs) have turbo drivetrains, this is NOT true. All nonturbos have the standard smoothcase transmission which is just as weak...just different ratios sometimes exist.