Auto to 5spd conversion?

[Rennat]

ok... im oh so close to buying a supra now... but one big problem... its an Auto... now i know you can to a 5-speed conversion to it... but how serious is it? i've searched the topic and couldnt find much... just a link leading to SF which was dead... so im stuck... and im sure somebody has done this, so if anybody has some info, please tell me!!!!!!! Thanks.

 

[pimptrizkit]

well, im going to school to become ase certifed and hopefully work for toyota,

so with that being said, i have also ran into the same delima as you, except i have read alot on the swap,

as for the swap, you will need the following..

clutch pedal assembly,
brake pedal assembly,
clutch master + clutch slave,
hydrolic lines inbetween the slave and master. along with flex lines.
5spd tranny (perferably a turbo r154((400+ friendly) tranny if any , but w58((good for roughly 300-350rwhp)) works if you source one from a 7mge)
tranny brace's the 2 tranny wings that help mount motor to tranny, and the rear tranny brace that keeps her arse tucked up in there..
5spd drive line, to go along with tranny choice, not sure if length or splin is different..
shifter, shifter bushings,
new or decent shift boot,
clutch, flywheel, and pressure plate. i would not reccomend using a used set up, because you could have a bad used clutch, chatter, slipage, rough engagment/disengagement.
but then again, if you get the flywheel and cluch and pressure plate out of the same car, it is possible to run it as is, untill it goes out.

you will also need to jump the neutral start switch, so your ecu thinks your always in neutral, im pretty sure when it's in neutral the ecu fuel maps aren't modified for shift points like they are for the a/t so the jumper wire creates fuel maps more like that of the m/t's cars..

most this should be right, other then the fuel maps, i took a gues at that, because when your in neutral you really dont need shift points/fuel curve adjustments for shift's...

 

[Pokey]

its easy, if i can do it, you can do it, i did it all by myself, and dont be afraid to ask around, and surf the web and forums for info

jeff

 

[americanjebus]

ok... im oh so close to buying a supra now... but one big problem... its an Auto... now i know you can to a 5-speed conversion to it... but how serious is it? i've searched the topic and couldnt find much... just a link leading to SF which was dead... so im stuck... and im sure somebody has done this, so if anybody has some info, please tell me!!!!!!! Thanks.

can you change a clutch and use but connectors?? thats all the skill you need, the expensive part will come when you decide wether or not to rebuild or put new stuff in the replacement 5sp.

 

[Rennat]

can you change a clutch and use but connectors?? thats all the skill you need, the expensive part will come when you decide wether or not to rebuild or put new stuff in the replacement 5sp.

im sure i can change a clutch. helped my brother and his friend do it to his FWD honda... which wasnt easy... so im sure a RWD supra would be much easier since you dont have all that other crap in the way... we have all the tools as far as i know, jack, jack stands, sockets, wrenches, torque wrench, just about everything... minus a few things. but what would be a good transmission to go with?

 

[Bigdough666]

Its a fairly easy swap, nothing to it. The hardest part for me was bypassing that neutral safety switch, and thats not hard.

Id go with the R-154 as far as a tranny, its jus stronger. You will need a manual turbo driveshaft (assuming you go with the R-154) as its NOT the same as the auto driveshaft. And you will need the "wings" (tranny supports) that go to the block for the manual tranny as well, they are not the same as the auto (I snapped one before I realized they were different). Some people swap out the ECU, but some dont. I didnt, and shes workin fine. Goodluck and dont be scared to ask.

 

[siman]

http://www.supraforums.com/forum/showthread.php?t=125064

I just completed my 5 speed swap 2 weeks ago. If you have a complete 5 speed parts car you will have everything you need to perform the swap. Here's what you will need:

5 speed.
Flywheel and bolts off of the 5 speed car
lower "wing" tranny mounts that bolt to engine (they are different)
Inspection cover between tranny and engine
Driveshaft from 5speed
Pedal Assemblies
Master Cylinder

The whole swap is really easy. I've never tackled anything like this before and did it in 3 days. I could have done it faster but I was waiting on my clutch assembly so... The only custom work you will have to do is in the tranny tunnel. You MIGHT have to open up the hole for the shifter tower. I opened mine up a little and found out later that I didnt have to. I think it depends on the year model. All the holes are drilled for you to install the pedal assemblies and the master cylinder. One thing I would also recommend is that you have a braided stainless hose made to run from the master to the slave cylinder. The hard line is really hard to get out of the car because it runs underneath other hard brake lines and you wont be able to get it out. You could buy all 3 pieces from Toyota for about $65 or make a new braided stainless hose for about $35.

On to the Wiring:

As for bypassing the neutral safety switch... haha... I feel bad for the many people who have paid someone to bypass this..... I can give you a REALLY easy tip around this.... There's three harness connectors on the Auto... look for the one that is round and has three wires running in it, a BLACK wire, a WHITE wire, and a BLUE wire.... Cut that plug off the tranny with some wire to spare.... Take the WHITE and the BLACK wire and splice them together... Plug that connector into the harness side in the car.... Your ECT ECU will now think your car is in park all the time and it will start right up. Too easy.

You can then wire the clutch switch in line to the ignition wire that runs to the starter relay. It's a white wire coming off the ignition switch. You will only need to do this if you want to have a clutch safety switch, as it isn't necessary. Too easy there too.

The reverse lights I haven't gotten around to hooking up yet.... I will tell you that the harnesses are different between the auto and manual, but the wire colors (RED WIRE & YELLOW WIRE) are the same. therefore, get the male end of the harness off of the donor car and then splice into the male end of your car and you'll be in business. One of the 3 round plugs on the car side have the red and yellow wires to splice into. The manual reverse light harness is a TWO plug harness with a RED wire and a YELLOW wire.

The last one that you need to be concerned over is the Speed Sensor. It's a Rectangular plugged harness with 4 or 6 wires I forget. Anyways, they are identical between the manual and auto, so the manual harness will plug right in. This will enable your cruise control to work. The other wire you have to worry about for cruise to enable is the switch on the top of the clutch pedal itself. It opens the cruise circuit and disables cruise when you press the clutch in... I never hooked mine up because I have an aftermarket wheel and pulled my cruise module out. I will investigate further and get you an answer on that too.

That's really about it. Everything aside from the possible cutting is a bolt on afair....

Oh yeah, one thing I had to do... The hole in the back of the crank for the pilot bearing seemed to be a little to small for the pilot bearing to go all the way in... I used my dremel and sanded it open a tad bit to make a snug fit. That pilot bearing should be fully seated into the back of the crank if it's installed properly. You'll see what I mean when you get up in there.

That should be about it.... PM me if you have any questions or if I missed anything. You'll honestly be suprised at how easy it is.

Good Luck

- Chris HamsmkIII

Its easy guys, me and Mk3_300 just did it to his mk3

 

[miggles]

I did mine (RHD) in aust.Its not that hard to do.Hardest part was installing the clutch pedal and brake pedal.Have to be a midget to be able to get under the dash.r154 are f@#king heavy so make sure u got a jack under it to lift it up.The auto (a340e) and the R154 share the same splines on the yoke.The front sction of the tailshaft needs to be lengthend by 15-35mm (some small amount iirc) or use the manual tailshaft.Just dont drop the tailshaft on ur little finger squishing it inbetween the exh and the tailshaft.Did some nerve damage and took months till it healed.

 

[Clueless]

this will come handy when time comes.... :icon_razz

 

[Element256]

Where in Cali are you ?

You can source every part u need at a local Junk Yard, but you'd want new mast\slave cylinders from toyota.

Or just call Aaron at Driftmotion and he can source all the parts for cheaper than anyone and ship them to you or even install for cheap if you're in the soCal area.

 

[ILikeCarsYesIDo]

Holy crap this is old!