Six Speed in a 6GC Options

[Fastbird]

I've heard talk of people thinking about it but have never seen any factual attempts. These things need a sixth gear.

I was pondering, and it probably wouldn't be toooooooo terribly difficult to have a bell housing adapter made for something like a 7th gen and then have a custom input shaft in a longer length made.

Are there any other ideas floating around out there?

[WH95TE]

Would be neat.

[dustinkemp]

i think you volunteered yourself lol

nah but it would be cool

[Kwanza26]

yeah... but gearing would be very poor for the 5SFE. What's your reasoning behind the 6gc needing more gears?

As for your suggestion... it is possible, and none too difficult to make a custom bellhousing (removing the 7gc bellhousing) to mate to a 5SFE. The 7AFE can probably use its current bellhousing over the C160 gearset, which is very very similar to the AE111's C60.

[gt_driFFter]

I don't know if it makes a different, but he doesn't have a 5sfe, he has a 3sgte. I've heard the 7th gen tranny's are actually kind of weak.

[Fastbird]

My reasoning is that on the highway I can't stand trying to maintain 80 MPH whilst turning 4000 RPM. If I could get an overdrive and cut that down some to the 2500 range, these things would be PERFECT on the highway.

What does toyota make in a transaxle configuration with a six speed??

[Kwanza26]

My reasoning is that on the highway I can't stand trying to maintain 80 MPH whilst turning 4000 RPM. If I could get an overdrive and cut that down some to the 2500 range, these things would be PERFECT on the highway.

What does toyota make in a transaxle configuration with a six speed??

Toyota makes the C60/C160 and that's it. Regardless of having 6 gears or not... the C160/C60 final drive and gearing is very short and you'll still be at around 3500 rpms at 80mph in 6th gear... similar to what we are currently.

And no... it doesn't really make a big difference if he has a 3SGTE or not... in fact, the bigger the torque, the worse a short gear'ed tranny would be for it acceleration-wise. Pushing acceleration towards the top rpms negates that fat torque-band...

[lagos]

My reasoning is that on the highway I can't stand trying to maintain 80 MPH whilst turning 4000 RPM

4grand is where all the magic happens on the higway. your tvis plates open up and the car comes alive! if anything i think the gearing is great on the highway, because you are alwasy in your power band.


you can alwasy change over to the mr2 tranny. it has taller gearing and lsd. that would seem like a more logical upgrade. i dont think i would trust the 7th gen tranny. you might also run into a lot of dumb issues like trying to find motor mounts that would work correctly or axels, that would make it more troubble then its worth.

[playr158]

you don't need 6 gears...
we need taller gears...which all you need is someone to design a set of gears that you can swap out in your existing tranny...not a new one

the celica wasn't made to have the amount of power we are swapping into or for great highway cruising....its downfall is short gears

if someone could get a taller set of gears made that would be better leave 1st gear alone but make 2-5 taller..(my jetta is geared taller and i love it) cruising at 70mph at 3,000rpm is much better then the celica's 3,500 or so

my personal goal is to road coarse the celica once i finish so getting 2nd gear to reach almost 75mph at rediline, 3rd to reach about 100 @ redline, 4th about 140 and 5th about 180 would be great

This post has been edited by playr158: Aug 12, 2006 - 9:56 PM

[Dr_Tweak]

Using the 7th gen GTS tranny would pretty much be the only option, with a custom bellhousing, mounts, and axles. It would probably hold up under 250whp just fine, but as mentioned, the gearing is even shorter in the 6-speed than the 5-speed. The only option there would be to somehow increase the final drive, either with a custom gearset, or larger diameter tires....

-Doc

[j0e_p3t]

hasn't anyone tried swapping a 6 speed blacktop 4age?

[burneeed]

theres a guy in ... I think hes somewhere in europe who modifies their e153 to make it a 6 speed... but honestly I can only imagine How much money it would cost and shipping and what not... Im not real familiar with the topic....

But its been discused many times.. theres no 6spd trans to match up with a s series motor to work.

[Silver94CelicaOw...]

Yeah, our cars really need a 6th gear or a much longer final drive....Unless you want to keep your engine at full hoot on a long trip at speed its going to get really old. Theres been countless times when I drive my car on the highway that I wish at around 80 I could shift into a 6th gear and be doing about 80mph at 3k or so.

Also consider this....When youre cruising at 4k RPMs theres so much unneccesary friction that you'll probably comsume more oil, and the second you lift off the throttle it becomes massive ammounts of vacuum that'll suck oil the PCV and such, not to mention the higher temps at cruising speeds. I never liked it about my GT, but unfortunately the only fixes would be VERY expensive.

The best solution is probably E153 from a Camry, MR2, or Solara. It's OEM and affordable, and is probably as good as we can get to having a cost-efficient transmission that is good for cruising on the highway. If we could get a transmission that was custom geared though, that would be sick.....Theres places that can do such work but it'll cost a ton of money.

[DEAMON]

how much money and who woudl make it

the 7th gen trany out of the GTS would fit a 7AFE but there might be problems with the hubs & drive shaft

[hitcachi]

Best solution and fastest way to a 6 speed celica is.... take out the 3S and swap in teh 2ZZ engine and tranny. The Doc knows how. There was a huge ass debate thread on this a while back.

[playr158]

like i already said someone needs to take the OEM gear ratio #s outta an E153 or S54 (both would be nice) and start talking to a shop that cuts gears..and discuss about making LONGER gear ratios..in theory it should be a bolt in application and all you need to do is swap out your gears in the existing bell housing (yes this has been done before)
i'm not sure if you could fit a 6th gear...but lengthening gears 2-5 is doable probably at the cost of a few hundred dollars

[o0black0o]

My reasoning is that on the highway I can't stand trying to maintain 80 MPH whilst turning 4000 RPM. If I could get an overdrive and cut that down some to the 2500 range, these things would be PERFECT on the highway.

What does toyota make in a transaxle configuration with a six speed??

My Auto ST has OD. I hit 80 and im runnig around 4k I belive. I don't remeber off the top of my head. I know your talking about standard though.

[Fastbird]

Does anyone have the gear ratios and final drive ratios of the 5S-FE 5 Speed and the E153 transmissions handy for comparison??

[celicaST]

Does anyone have the gear ratios and final drive ratios of the 5S-FE 5 Speed and the E153 transmissions handy for comparison??

here you go,

s54: 3.285, 1.960, 1.322, 1.028, 0.820 / FD: 3.944, 4.176
e153: 3.230, 1.913, 1.258, 0.918, 0.731 / FD: 3.933, 4.285

the final drive ratio differed based on application, the bold are 6gc (i think) and mr2 sw20 turbo.

This post has been edited by celicaST: Aug 15, 2006 - 9:54 AM

[x_itchy_b_x]

id buy a longer finally gear. 80mph at 4k sucks when trying to cruise not race. being in a power band is one thing reving the crap out of your motor and sucking down gas is another.