Shift kits for auto trans.?

[240sxin]

hi i know this is kind of a dumb question but i was wondering if there are any upgrades for the auto trans in the 89 240sx? i know it would just be better to swap to the manual trans but thats alot of work and im just wondering if there was any way to improve on the auto trans.any info would help. thanks guys and take it easy.

[Aries]

what exactly are you looking to improve?I have built a couple of them to handle very large horsepower and torque numbers, but it's all in what you are wanting as to what you use in them.

[240sxin]

im just looking for quicker shifting maybe just better all around acceleration, im not sure really, i was just wondering if there is just a way to imporve the shifting all around.

[yelnatsch517]

Will an auto trans on a '95 240 be able to handle 350whp? If so, i'll just stick with the auto. I think its too much of a hassle also to switch everything over. An auto trans will totally make the car look sleeper.

[GEO]

You do know, the 240 auto transmission is a skyline transmission.

[240sxin]

is it really a skyline transmission? if it is i guess theres no really improveing on it is there? o well thanks for the info so far guys.

[574-240sx]

converting to manual would be much easier than trying to stick that auto back in. Its pretty easy if you can find the parts.

[onosqv]

If you are going turbo, what you are probably looking for is a high-stall torque convertor.

I know there a couple shops/web sites that do it. It runs anywhere from 400-600 dollars.

What it allows you to do is not shift the car until a higher rpm, allowing you to spool and basically drive more like a manual.

You'll have to search for it, it's somewhere on this forum because I've asked the same question.

If you do decide to go w/ this upgrade, you will probably want a transmission fluid cooler and obviously some spankin new transmission fluid.

[GEO]

Shift higher? WHat?///// A troque converter always you to launch at a higher RPM

[yelnatsch517]

If you are going turbo, what you are probably looking for is a high-stall torque convertor.

I know there a couple shops/web sites that do it. It runs anywhere from 400-600 dollars.

What it allows you to do is not shift the car until a higher rpm, allowing you to spool and basically drive more like a manual.

You'll have to search for it, it's somewhere on this forum because I've asked the same question.

If you do decide to go w/ this upgrade, you will probably want a transmission fluid cooler and obviously some spankin new transmission fluid.

Where can we get transmission fluid cooler? Never knew there was such a thing. Hmm, sounds interesting. I might just end up doing this. Having and auto trans is much easier in SoCal with all this on off traffic. Constantly shifting gears just gets tiring after a while.

[onosqv]

Shift higher? WHat?///// A troque converter always you to launch at a higher RPM

That is correct. Well, I was thinking it would also allow you to shift to the next gear at a higher rpm than auto's normally do because of the way they worked.

Please correct me again if I'm wrong:

the hstc's gears or whatnot are made so that they don't lock until a higher rpm (i.e. 2600+ rpm) or something. Of course, this will allow you to build up rpm while staying put so you can launch at a higher rpm.

Does this not also affect when gears 2,3,4 come into at the rpm spectrum?

If not, I'm sorry for the misinformation, that's why there's always more qualified members to correct my mistakes .

For sure tho, they are suppose to also provide more responsive shifts

From levelten.com support:Quote »Dear Enthusiast,We do offer 2 upgrades for applications such as yours and they are a pts hydrosystem upgrade and a pts torque converter upgrade. They will get rid of all the lag and the hesitation off the start and shave off anywhere from 1/2-1 second off 1/4 mile times. Now pts hydrosystem upgrade will get rid of the factory lazy luxury shifts and replace them with throttle oriented shifts. They make transmission much more responsive to power upgrades and transmission then can with stand the punishment of forced induction or power adders (i.e. nitrous).[/quote]yelnatsch517:You can either get a generic one (i.e. Haynes or something), or get one off another car. There are install instructions somewhere on this board, just search for "transmission oil cooler"

[yellow_jacket]

As quoted in your article the "pts hydrosystem upgrade will get rid of the factory lazy luxury shifts and replace them with throttle oriented shifts" That is where you are getting the quicker, crisper shifts from.

Think of it this way: A torque converter is like an automatic clutch. It will slip until a certain number of rpms(like you would slip your clutch to get moving) then it will eventually lock almost all the way down. By changing the stall speed, you are just allowing the motor to rev further up before the car will begin to move and the converter lock up. This allows the motor to get closer to its peak power range when you step on the gas.

[180fan]

Look around for the Buddy club piggy back fuel computer too. It's also able to modify your shift points for the AT based on throttle percentages.

[tonynalli]

this is kidna fun to do.

http://www.240sx.org/faq/index.html

yelnatsch517: i read that you mentioned that you are looking for an auto transmission cooler, if you want one i have one that was used for like 3 weeks. let me kno. [email protected]

[Dattebayo]

So what happens then when you want to drive in normal traffic?

If you have a auto car that only meshes the gears when you rev hard or high, you will not be able to drive normally with that convertor installed.

Tell me if im wrong, but that seems kinda useless.

[Aries]

my auto had raybestos clutches and a kev-star band. This along with enlarging the pressure regulator chamber in the valve body, and a 4000 RPM torque convertor allowed the car to do 1.9 60's on motor, and held 200hp of nitrous regularly, with the ocasional 300hp shot.

This car was daily driven in this form for 3 years before I finally blew the KA.

[GEO]

So what happens then when you want to drive in normal traffic?

If you have a auto car that only meshes the gears when you rev hard or high, you will not be able to drive normally with that convertor installed.

Tell me if im wrong, but that seems kinda useless.

No No, it allows you to stay put when you power brake.. allow you to power break higher without the torque converter slipping out to make you go.