6sp gearbox

[jason_]

What'll bolt to a b3 that a 6'er? If any thing at all?

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[Rocketman]

None

[JPT]

It's been discussed before. Unless you want to get fancy with adapters and custom axles and parts (and possible frame clearancing), nothing just bolts on.

Someone once mentioned Mazda 3, but I've heard no more about it.

[Zanzer]

I have a Mazdaspeed3 with the 6 speed and the bellhousing and bolt pattern are WAY different than a B motor.

[bhazard]

That trans has to be huge compared to anything we run anyway. Has to handle tons of power from the factory.

The newer Rio has a 6 speed that might be a better fit but it definitely won't bolt to a B.

[Zanzer]

^ Oh ya, it's wider and beefier than a G series. Here's a pic of one:

[JPT]

^ Oh ya, it's wider and beefier than a G series. Here's a pic of one:

That looks like a crazy amount of work (and $$$) just for one more gear.

You can keep it.

[jason_]

Hmm....

Would a 4sp 3.xx diff sit in a 5sp gearbox?

Wanted more gears, maybe I'll just settle on a different final drive.

I doubt more gears handle more power, I think they do it to keep in the narrow power band.



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[FestYboy]

Zanzer, if i measured correctly, it's shorter than the F/G series trans from input shaft to back plate... and it runs tripple layshafts (more power capacity and smaller package). it also appears that there's enough meat in the bell housing to allow for mods to bolt to B series engines. the other option is the F40 trans from the Pontiac G6/Saab 93. and there are newer 6 spd trans in smaller cars within the past 2 years as well.


jason_, the final drive in the 4 and 5 spd festy transmissions are the same (first gen E series), so theres no piont in swapping internals arround.

[jason_]

I'm using aspire gearbox. If that makes a difference. I heard aspires were 4.x final.

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[FestYboy]

correct, the final changed, but none of the gear ratios changed.

[Zanzer]

It may be shorter but it's wider so clearances between the firewall and radiator may be tight, kind of like an auto Festy but I'm thinking worse. As for cutting on the bellhousing, even a damaged Speed3 gearbox is $600 so I'll let you pioneer that swap Arty LOL :mrgreen:

[FestYboy]

oh great, thanks!!! lol I'll get right on that. i know that the Fusion uses a 6spd manual as well (should be the same unit), it may be cheaper because it's not behind a turbo engine. turbos make things more exspensive for some reason.

[Zanzer]

^^ It may be more expensive due to the Torsen LSD that comes in it from the factory. Or maybe just the name Mazdaspeed attached to the part...probably both LOL

[getnpsi]

What is more important, 6 speeds or dropping 5th gear another 400 rpm on the highway in 5th with 1-4 the same? you dont hear about it much but people are figuring out custom gears and quietly fitting them into street cars. I found a page where some guy took a zx2 2nd gear rewelded it backwards and it became a 50% rpm drop from 4th gear. It ate itself up but he did good research on this.