is it possible to auto trans a SR20DET???

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1991SE240SX
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Car: 1991 Nissan 240SX SE Coupe

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this is just a lil question ive always wondered?? is this anyway remotly possible?? if so-what trans can be used?? KA24DE trans?? im not a fan of stick shifts, nor will i ever be. ive read the thread about auto being better than manual already and i agree with evrything it said. Autos shift on their own and have a better design inside the trans(gear setup)....while manuals are better on gas, you have to worry about missing gear throws(grinding gears), cluthes slipping, clutch pressure, and all that crap. im good. And the fact that you are actually LOSING power when you press the clutch in.....self explanatory.... . and with drag racing (ex....NHRA,etc) using autos more and more because they are less likely to break, can handle a bit more juice if built up right. sheeeeiiiit......its a no brainer. will someone shed some light on if this is possible to do....thanx a ton guys.later


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the converted
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Perhaps the stock sr20det automatic transmission if you can find it. While some of your arguments are good, a few of them are a little iffy for me. I'm not sure how much power you could put through an automatic from the sr20 before it starts having issues, but I'd be willing to bet it less than the manual will take. Along with the additional power loss, it will be slower than an identically powered manual car.

1991SE240SX
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Joined: Fri Mar 20, 2009 3:59 pm
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wow...they seriously have auto SR's?? sweet shyt. Know where i could possibly source one out at?? or at least start looking?? its either get a free red top and do this(auto it and slap it in) or pursue a wild idea i came up with at work and swapping in the heart and soul of my dream car....Buick GNX!!!!! with the facts of 3.8L v6(bigger than a RB ), turbo, and they only came in autos?? why not, right??plus you could do very little to that motor and it was setting records back in the day. I dont think it had much competition. To move that big and heavy of a car that fast-that motor is nasty. but a free SR??? c'mon now.....

and i do totally agree with what you said about the auto crappin out under any serious power. But i jus want a stock SR/auto setup. If anything id maybe do a IC upgrade, full exhaust(no crap convertor or resonator). not sure about anything else. What do you think is the max HP/TQ that auto could take before takin a deuce??

thanx dude, i appriciate the feedback.(was afraid to hit post after typin up the thread haha-didnt wana see the bashing id get wanting auto over 5-speed hahaha)

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the converted
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Just because I'm not a fan of the idea, doesn't mean that I won't help it get done. Call around to GOOD importers and see what they have around. Pretty much no one wants one. I doubt that you'll get one with a complete harness and TCU, but I would guess that the KA one should work just fine.

1991SE240SX
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mr. converted....thank you very much. i really do appricate it man. it may seem like a far fetched idea, some might even go as far as saying its a stupid decision on my part....but with mine being an auto now, i dont wana do the whole clutch pedal and and master cylinder install. i jus like to be "diff" so-to-say.

if you dont mind me asking, i know its a personal choice, but why arent you a fan of the idea?? im jus wonderin....who knows-i might jus come to my senses and do a wicked LS swap or look more into a GNX swap. again...thanx bro

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the converted
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Main reason is just vehicle control. I've always felt much more on top of what a vehicle is doing, either auto crossing or on a track, in a manual. Other than that; they are slower, heavier, and need more things to support them like a fluid cooler.

If they weren't that much better for performance, you wouldn't have high end car manufactures spending the time and money that they have developing computer controlled manuals.

elo240
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I have an auto sr in my 240 and I love it. I know thats not the most popular point of view but what ever. My car was an auto and to be different I decided to leave it an auto. I had my swap do at UP Garage in Tacoma Wa. First rate guys. They even installed the E-AT switch, this adds 3 shift mode to the transmission. 1 normal shifts early to save gas, just like a regular trans2 Power Shifts at much higher rpms so that you are well in to the boost3 hold forces the transmission into what ever gear you select and does not shift.

To help the car accelerate we added a 4.11 geared lsd rearend.The car pulls hard but it turns 3000rpm to do 65 so my gas milage is not as good as it could be.
Modified by elo240 at 8:31 PM 9/3/2009

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Wretched
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^^^Off-topic: where did you get that stock airbox?

On-topic: I've always wanted an auto sr swap...just as a daily driver. Just remember there is a little more maintainance with the auto....and it will be a little bit more expensive to repair when something does go out. I'm also not sure what kind of power those things can handle. Mazworx makes kits to put whatever transmission you want on an sr...my old boss has a power-glide on his. With nitrous he's running high 6's in the 1/8th...but that's an all out drag car. You could bolt up a th350 or 400 and be set for the street.

elo240
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It came with the swap. I asked for my swap to be as close to stock factory as he could do and that's what I got. Another thing to consider about buying an sr with an auto is that they tend to less molested and abused then the 5 speeds. All the parts for my swap came from the clip, no one had modded it!

1991SE240SX
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Joined: Fri Mar 20, 2009 3:59 pm
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that is so the shyt right there. ive had this on my mind for quite a while now....and for the same reasons as you. to a 'T' bro....to be a lil diff, it IS my DD-not a auto-x or drift/drag car. i jus thought itd be kool to keep my auto setup, keep it clean but do it SR style. Was the swap any cheaper with an auto?? anyone know the goin rate on one of those trannys?? with 5-speeds bein the drug of choice for most-i cant imagine them(autos) bein that much money.

BTW.....why does your interior look so nasty(in a good way, haha ) your carpet looks awesome(mine was a limited edition carpet....gray w/ brown coffee spills evrywhere.....now black thanx to dupli-color haha)and what kind of seats are those???? and you wanna sell your digital CC?? haha j/k....but not really-seriously?? haha

later man

elo240
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Joined: Sat Jun 17, 2006 4:48 pm

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My mechanic charges the same price for doing the swap but there was a little more labor involved than he had expected. He and his crew had not done many autos so there was some unexpected work with the wiring that cost more. I got the sr swap with AC, 180sx front brakes and a vlsd installed for 5 G's.

The carpet is custom made by a friend on mine and the seats are stock s13's but recovered in two tone leather and a bunch of extra padding to increase the support. Yea and DDC are so cool

1991SE240SX
Posts: 37
Joined: Fri Mar 20, 2009 3:59 pm
Car: 1991 Nissan 240SX SE Coupe

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where did u get that from(DCC)?? besides the ovious unit witch out-was there anything else that needed switched/changed??? i think that shyt looks dope. coulda got the digital unit itself for $20 on the local craigslist and slept to long on it-and now its gone. wasnt sure what else was needed for it.

elo240
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Joined: Sat Jun 17, 2006 4:48 pm

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There is a lot of stuff to go with it. do a search you'll find all your answers, I did. ohh and I bought it off ebay for like 250 for everything.

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98s14inaz
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1991SE240SX wrote:this is just a lil question ive always wondered?? is this anyway remotly possible?? if so-what trans can be used?? KA24DE trans?? im not a fan of stick shifts, nor will i ever be. ive read the thread about auto being better than manual already and i agree with evrything it said. Autos shift on their own and have a better design inside the trans(gear setup)....while manuals are better on gas, you have to worry about missing gear throws(grinding gears), cluthes slipping, clutch pressure, and all that crap. im good. And the fact that you are actually LOSING power when you press the clutch in.....self explanatory.... . and with drag racing (ex....NHRA,etc) using autos more and more because they are less likely to break, can handle a bit more juice if built up right. sheeeeiiiit......its a no brainer. will someone shed some light on if this is possible to do....thanx a ton guys.later
I remember when I used to think that until I learned to drive stick and never looked back. All my cars are 5spd including my truck. Proper manual gear box ftw.


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