i'm looking to build a high hp auto trans for my b18c turbo. i'm making around 500ish and am tired of 140mph+ going 10's and 11's. i want 9's lol. the reason being is i'm not getting off the line proper due to spool up and catching the finial rev in 1st and hard going into 5th. i'm just tired of all the clutch crap slipping and brake axle and tranny off the line stuff. I just want to come up to the line, trans brake with load, and take off. no 2step 15lbs what not off the line then spin spin spin and then maybe miss second or try to catch the last rev bouncing off the rev limit in 1st then shift into 2nd. i'm so tired of that crap.

what do honda guys do to beef these auto trans up? what I am trying to say is, what is the weak link of the trans? oil pressure? clutch? tq converter? bands? gears? etc....

maybe it's just me or I have not yet to see any honda auto trans going fast? or is there not a such thing for honda auto going into the race world.

 

yea honda going fast with auto...i think its impossible with an oem tranny...ur gonna need to make something custom...probaby gonna spend the same amount u would for a 4spd dogbox and a set of dss 5.9s...if u have ever disassemble an auto tranny from a honda you would see why...too weak..they break on 140hp stock engines imagine with 500+..

 

i was trying to find out the same info u just posted due to the fact that my civic is auto trans.sounds impossible but its do able with the right connections n ideas

 

I'm currently working on this...will try update, hopefully this summer.

 

In most opinion's you'd need to own a bank then have the Gov't give you bailout money to have enough cash to do this.

 

I am doing the same thing, im in testing progress right now. so far good to 300whp and holding, but need a new converter, it's slipping. after that i'll see if my guys in texas can build me some stronger shim plate and double the clutches.

in the mean time. oe honda trans can be made fast i'm sure, someone has to just spend the time on it and fix all the weakness.

 

im also working on this my self but having issues with geting clutches and steels made for the drums

 

Compared too?... $1500 twin disc, to 5-7,000 dollar dog box ect?

I am working on some auto stuff too, new auto trans will be installed in the next couple weeks, then the turbo kit, and see what happens.


For you auto guys.
Info I have found.

ATI has no problem rebuilding/modifying our converters.

After market clutches and plates can be found thru a company called Alto, the make most clutches for honda rebuilt kits for trans shops, which means they already have the dies, they also offer a heavy duty material called "Red Eagle" which is used primarily by TCI for allot of their trans and is a common clutch upgrade in the domestic side of racing.

All of the steels and clutch can be ordered from this chart.
http://www.automaticchoice.com/Catalogue/honda_a24a.pdf

92-95 BDHF trans all share allot of common parts,mechanisms, ect. I went with the M24a trans. They are all hydraulically controlled, no ecu or solenoids to deal with. Also the valve bodies allow for 1-2-3-4 shifts manually, most OB2 trans valve bodies do not allow for manual puting the trans in first.

The honda trans fluid is has allot of friction modifiers in it, makes the trans not bang, problem from what I have saw is it makes them slip more with power, once a trans is run on honda fluid it impregnates in the clutches. Also keeping the trans cool is another thing I am going to do with a large trans cooler.

So far my 5speed to auto swap...






Its just a machine, it can be modified...

 

You make a auto hold 600whp in a Honda and you will be reach and 9 second daily drivers will be dime a dozen.

 

****, I know how to get a converter set up for the thing. Just send it off to PTC or ATI and they'll cut it open and loosen it up.

If somebody can figure out how to get a Honda B-series auto tranny to manually shift all gears with no bullshit, then i'll put my Integra back together. I just haven't put the time into figuring it out. Well, actually, i'm uncertain how to get it to work as far as the fluid routing. I know there is a B16 specific auto trans. It's supposedly a screamer for an auto tranny. Whatever though, an auto tranny with a high stall converter will be the nuts. **** all of the busted *** stick tranny's. I'm tired of hunting down little intricate 5 speed parts for rare or impossible to find tranny's.

Get the auto **** working. PLEASE! I want it, and so does everyone else. Yeah, you really do, so stop denying it.

Somebody simply do what all of the other automatic racing transmission companies do. Simply make a special kit or valvebody that people can buy and install into their ****. This means they buy a very affordable kit. Simple! Then we can all throw away the garbage *** stick tranny's. I mean, i'm just fed up with hunting that old worn out *** **** down and blowing more of my hard earned bucks on a stock quality pos gearbox that might not last a weekend. Auto tranny or GTFO! lol

 

Everything people have tried up to this point has been just standard rabestos replacement crap. I know a company giving is a real shot right now so hopefully there will be something that can hold the big hp sooner or later. They do good trannies for GM cars that hold big power and they have a pretty stout Honda in house to put it through some abuse. Maybe something good will come of it.

 

that's the whole purpose of this post, I know many want to bash but it's gotta be done. I am just too tired of braking clutches, single, twins, you name it i've broke em, brand new twin disc slips sometime. im just tired of going 140mph and not hitting 9's. in a auto world, that would be eassssssyyyy mid 9 maybe 8.

i'm working on a manual valve body for the b series. I have a guy local who can mock up a pieces for the valve body and get rid of the shift solinoid and "POSSIBLE" make a hella of a killer auto trans for us fwd drag nut guys like me. don't get me wrong, manual is fun, but not at the track.

BIGTUNA, thanks for the info. i'll give those guys a call tomm. the valve bodys on these auto trans can be modded to manual shift, pull the two 1-2 and the 3-4 valve spring on the valve body and remove the spring, you can control the gears but just having the manual valve and relief valve to control it, the only problem when doing that is the gears wont shift unless you let off the gas and stop, then it will shift. I have the have a valve body made that will accept the spring so oil will press through once the manual valve on the body comes and press close the gear your going into. in other words, if you do this, the manual valve wont push oil into anothe valve unless the trans is stop. so you'll be stuck in one gear, untill the trans stop, then you can go into another gear.

there has to be a custom valve body for this to work. well try to figure this out soon (i hope) i'll keep updates when i have some, in the mean time if someone knows more info, post on. thanks for advice guys. im not the only one who is into autos i'm sure.

 

I dont know the out come, but I am atleast willing to give it a honest try and see what can be done, so many people say what cant be done but none of them can give you one name of a person who gave a real try and tried to work thru the problems.

 

600 in an auto honda around 2200lbs would be mid to high 8.

 

so, time to try.....if we fail, then well know it cannot be done. untill then, no excuse

 

has anyone gone into modding the valve bodies IE re-drilling and what not? Also, can gears be swapped around? I know the OBD2 EX auto trans has shorter 1-2-3 gears than the 92-95 does.

 

that's what i'm saying, there's a guy local here that does this kind of work, on older fwd gm trans. he can prob do sometime for the mp7a trannys.
i'm sure the gears are, as long as the mainshalft and counter are the same there shouldn't be a problem i wold think.

 

Hmm, 1000 HP in a auto Neon at 2550 lbs = 9.20's
1000 HP in a dogbox Honda at 2500 = 8.50's

 

I wasn't even considering throwing anywhere near 600hp to an auto. For my current projects it would probably be just over 300hp. That's about it!

 

anyone tried contacting IPT? They done what John Shepard said could not be done
in a AUTO DSM. Now Auto DSM's are the new hot ticket. Even AMS joined in the bandwagon, building a AWD auto drag car.

Cheap things to try are:
a aftermarket cooler
line pressure mod
shift kit


http://www.importperformancetrans.com/hondaauto.shtml

 

can we use another manufactuers box?W/o a **** ton of work?

 

yea auto are starting to be very popular in dsm world. that's all they want now, because just like honda, they have weak trans and clutches. that's a good site. thanks for the add. they can prop help us out alot. i'll chck into it.

 

Awesome point, the guys who have had the strong trans available to them are still not going faster and have the same amount of power. The only thing you'll gain is consistency for bracket racing

 

I don't know about you guys, but the mid 8 second pass with an auto trans and only 600hp in a Honda made me laugh. I don't see that happening. Might want to double that power number.

 

I'm with you on that one. Seems they are forgetting about losses involved with a slush box.

If someone can figure it out and make a auto that will hold the power required, it will be a break through for Honda racing.

I'm sure the same things were said back in the early day's of drag racing about the automatic's back then.