your opinion on buy an auto for cheap and convert in to 6speed getrag later

[mpobor]

6 speeds are clunky. If you fit a non standard clutch, the pedal can be heavy and you lose feel, some of them are either on or off. 5 speeds are ok as far as gearboxes go, but you feel obliged to be gentle on them for fear of them failing.

 

The auto, just point and squirt. If you want the noise of down shifting through the gears, switch manual mode on and use the shifter.

 

i red that the 5 speed can handle not more than 450\500hp am i right?

 

i didn't know about the shifter on the auto.....

[mpobor]

David P can hybridise your gearbox, plus Suprastick and you can run flappy paddle shifts. Syvecs now has the capability to run paddle shifts aswell. The only upgraded box I would consider would be something like an SRD/Titan/Boostlogic autobox.

 

David P is here on the forum? so you will not raccomand to adapt an erlier autobox but stick with upgrades on the oem autobox? if would be mechanically possible to adapt a more evolute gearbox would be really nice... a 6 speed dual clutch on a supra .... but maybe is the same problem with the 5 speed manual... they crack above 450hp...

[MattP]

I know a few people from this forum that I'd let near my car before some "reputable firm's"...

 

Agree...

[Benjy]

i red that the 5 speed can handle not more than 450\500hp am i right?

 

i didn't know about the shifter on the auto.....

 

400ish is the limit for absolutely thrashing the box. Anything above is risky business.

[Chris Wilson]

Bear in mind you need a sophisticated ECU with expensive options to run an auto with much more boost than stock. Unless the ecu can reduce engine torque during gear changes you will soon find the sprag clutch or other gearbox internals failing. the stock ecu was quite sophisticated for its day, in how it also controlled engine torque V gear selected and during gear shifts. I have an auto single turbo of fairly modest power here right now, and the gearbox has eaten its own internals. Modding an auto is considerably more complex than a six speed Getrag transmission car.

[David P]

The T.T. Supra auto box is a highly underrated transmission, the link demonstrates what can be done.

 

http://www.mkivsupra.net/vbb/group.php?groupid=57

 

I could do with a holiday in Italy.

[Chris Wilson]

900 ft. lbs Getrag? Where the hell did that figure come from? That's large truck territory.

[David P]

900 ft. lbs Getrag? Where the hell did that figure come from? That's large truck territory.

 

If there's an alternative guesstimate I can edit?

[Chris Wilson]

Getrag will have the figures, but it sure as hell won't be anything like 900ft lbs

[j_jza80]

It's circa 520lbs/ft IIRC. The gearbox they made for the E39 M5, 8 series etc actually has a higher torque rating, at circa 550lbs/ft.

[Chris Wilson]

500 Newton / meters which is just under 370 ft lbs. That makes sense with a 450 Newton / meter stock engine torque.

 

 

900 ft lbs indeed, it's not out of an HGV!

[David P]

The figure I used was found on here and have seen 650 ftlb a time or two too, 370 ftlb sounds a bit limp to me?

[Chris Wilson]

Why would Toyota grossly over rate a very expensive component? They rated the `box pretty conservatively for the engine torque.

[JayJay1374]

maybe you bought it many years ago! in the last years there is no 6 speed supra under 12k... they average at 13-14k.... for 7k now you can get very look after AUTO... 7400 plus 2600 sounds like a really good bargain

 

I bought the car a year and a half ago. So I must of got a bargain then

[David P]

Why would Toyota grossly over rate a very expensive component? They rated the `box pretty conservatively for the engine torque.

 

What's the "official" torque figure for the TT auto box?

[mpobor]

The T.T. Supra auto box is a highly underrated transmission, the link demonstrates what can be done.

 

http://www.mkivsupra.net/vbb/group.php?groupid=57

 

I could do with a holiday in Italy.

 

don't know why but it seems that i don't have enough credential to read your link!!! shame!!!!

 

well.. for one of you supra owners i guess the last year in Rome would be your heaven no cops, no radar on highway neither on twisty road... ! for me it's just hell because i own pandas...for now... but i guess the time i own a supra they will cover my surround with cops and radar... murphy rules...

[mpobor]

I bought the car a year and a half ago. So I must of got a bargain then

 

indeed!!!! really!!!

[mpobor]

It's circa 520lbs/ft IIRC. The gearbox they made for the E39 M5, 8 series etc actually has a higher torque rating, at circa 550lbs/ft.

 

well... the getrag 6 speed of the supra is so expensive that i guess the 6 speed from the E39 can't cost that much...

 

still i'm actually start dreaming about a supra with 500whp with a 7g dct from bmw :):):) muhahahahahah

 

still can't read the David P posted link, what is in it?

[David P]

don't know why but it seems that i don't have enough credential to read your link!!! shame!!!!

 

well.. for one of you supra owners i guess the last year in Rome would be your heaven no cops, no radar on highway neither on twisty road... ! for me it's just hell because i own pandas...for now... but i guess the time i own a supra they will cover my surround with cops and radar... murphy rules...

 

 

That's because you haven't stumped up your subs and 3ish more posts then your free intro posting is on a sticky wicket too.

[Chris Wilson]

Never seen Aisin Warner's figures for the auto TT box, I was talking about the figures for the Getrag 6 speed manual. I am no expert on auto boxes at all, but i would guess it's shock loads on gear changes that kill them, rather than steady torque delivery.

[Pudsey]

In my opinion.

 

If you know you want a 6 speed, save up and buy the right car to begin with.

 

It will save you a whole load of hassle in the long run.

 

Either way you choose to do it, its going to cost you a lot of money to do it right.

[Scott-tt]

Memberships only a tenner then you can access the link

[mpobor]

Memberships only a tenner then you can access the link

 

i can't send even PM (i tried with David P)

 

i guss i need the membership too :(

[David P]

Never seen Aisin Warner's figures for the auto TT box, I was talking about the figures for the Getrag 6 speed manual. I am no expert on auto boxes at all, but i would guess it's shock loads on gear changes that kill them, rather than steady torque delivery.

 

I understand that, excuse the hijack mpobor.

 

One way or another, I have put a lot of work into the transmission group pages and to have accepted comparison torque figures in the intro would be better than not.

[mpobor]

i need further info on gearbox swapping.... anybody know where can i start looking further?

 

for manuals i saw people swapping the auto with a 5 speed using different bellhausing welding parts adapting plates ext... but auto to manual cut lots of hassle for the electronics.. somebody had or know who has experienced a AUTO-AUTO swap?

 

somebody knows if the syvecs stand alone is capable of taking control only the supra auto or can manage also other brand and type of autobox?

 

thank you all!! a lot!!!

 

i go for the AUTO... half price.. same car... and as far as i can see here and read in other post.. with a boostlogic rebuilt it's already a rocket..