Strong std trans?

[fiero_silva]

I'm looking for a fwd 5 speed trans that will hold 400+ ftlbs reliably and be decent on the highway. I know the 4 speed muncie in my car probably isn't up to the task.. The trans will need to have your typical gm bolt patern that will bolt up to a fiero 2.8, LQ1, northstar ect.

I've heard that the 5 speeds out of some newer cavilier's and sunfires are up to the task.

Any ideas on that, or other trannies?

[Paulie02]

well if you have a fiero and your looking for a srtong 5 speed for it then your best bet is the muncie 282 [often called the getrag - it is different then the getrag 282 that come in a beretta and corsica] but it is a strong tranny and a 5 speed it came in about half the 87 gt's and all of the 88 gt's

[sharkey]

you dont have a whole lot of options, but there are some. first off, stay away from anything isuzu, none of them will hold up to what you want to do.

the muncie/getrag 282 is likly your best bet. they are easy to find, and guys have had them in fieros with v8s and they seem to hold up. its also the tranny that most v6 guys use. parts are readily avalible for them aswell.

you coulde use a getrag 284. that is the tranny behind the 3.4l tdc from 91-93. they are pretty beefy. the biggest problem is that they are hard to find (only in grand prix/lumina 91-93) and parts are non existant. that unit was built by getrag in germany, and gm didnt ever fix them, they just put reman units in.

there is the option of the getrag f23 from the newer cavaliers/sunfires. they seem to be doing well behind some powerful 4 cyl cars, but the question is, will they hold v6 torque. you would need one from a 2.2l ohv motor from 2000-2002, an ecotec or 2.4l wont bolt up.

one more idea is the mt2 6 speed from a g6 gtp. they are fairly new, so no clue on how they would hold up, and would be pricey, but it is a 6 speed.

all those will bolt to anything with a small gm bolt pattern. the northstar doesnt have a small gm pattern, although it is a derivitive of it. it uses 4 bolts only and the bottom bolt on the diff side is in a different location. also you need to cut the bellhousing to clean the starter.

[fiero_silva]

In the fiero world, it's pretty much a general consensus that the 4 speed muncie that I have in my 85 gt is/was the strongest trans available in the fiero.... Is the 282 really that much better, and was it ONLY available in 87/88 fiero's, because that would make it damn near impossible to find locally...

I was thinking the MT2 6 speed would be my first choice.. That would be killer bolted up to an N*.. But, I think it will be quite a while before I see one in a junk yard, or for sale locally....

[sharkey]

all muncie/getrag 282's are the same base design, but there were some changes through the years. they came out in 87 and were used till 94 in fwd cars. j l and n bodies all used them, aswell as some w bodies. the best to use for a v8 would likley be a j/l/n v6 tranny from an 87-89, it has the right gear ratios for the v8 and the slave cyl should be easyer to adapt.

i have read an artical (though i cant remember were) on using a fwd 282 with a fiero.

[Joseph Upson]

The over whelming consensus I have read is that the Muncie 4 spd is the strongest as evidenced by its performance behind the V8 in Fieros. I have also read suggestions by some that the later model FWD Getrags have some minor improvements in the final drive area I believe that makes them a bit less prone to a particular kind of high load failure than those found in the Fiero and there is also the added advantage that the older the tranny the higher the mileage and fatigue so the newer the better.

The new 6 spd tranny will bolt up but then there's the:
$400 dual mass flywheel that relocates the clutch so it's a one of a kind fit
~$140 clutch specific to the 6spd due to the different spline number
~$170 pressure plate not sure if it is interchangeable with the Getrag flywheel
and the ever important axles also with a larger different and possibly exclusive spline number. Take a guess at what they cost.

After that you can make the custom tranny and shift cable mounts.

It has a rounded 300 lb/ft maximum torque handling capacity. It's actually 290 something but I figure GM is a little conservative.

[Paulie02]

I put the muncie 282 from an 88 fiero into a 96 monte carlo with the 3100 motor. I also put a getrag 282 from a 92 beretta into the same car.. i tested both.. the muncie from the fiero's in my opinion is def better and the slave cyliander is much easier to work with.. But in the way of finding them as far as i know they did only come in some 87 and all 88 fiero's the 87 gm helm manual hardly even mentions the tranny... but the full rebuild is in the 88 manual..

If you dont mind me asking where are you from?? i might now where to find one thats why im asking..

[fiero_silva]

all muncie/getrag 282's are the same base design, but there were some changes through the years. they came out in 87 and were used till 94 in fwd cars. j l and n bodies all used them, aswell as some w bodies. the best to use for a v8 would likley be a j/l/n v6 tranny from an 87-89, it has the right gear ratios for the v8 and the slave cyl should be easyer to adapt.

i have read an artical (though i cant remember were) on using a fwd 282 with a fiero.

I'm not building a 5500rpm redline V8, I've building an 8000rpm redline northstar, so your typical "gear rations for a V8" is kinda thrown out the window

The new 6 spd tranny will bolt up but then there's the:
$400 dual mass flywheel that relocates the clutch so it's a one of a kind fit
~$140 clutch specific to the 6spd due to the different spline number
~$170 pressure plate not sure if it is interchangeable with the Getrag flywheel
and the ever important axles also with a larger different and possibly exclusive spline number. Take a guess at what they cost.

After that you can make the custom tranny and shift cable mounts.

It has a rounded 300 lb/ft maximum torque handling capacity. It's actually 290 something but I figure GM is a little conservative.

With the N*, I already need a ~$400 custom flywheel, good strong clutch and pressure plate... I'm also already making custom trans and motor mounts, due to having to modify the engine cradle for the N*. Also, if I use the current muncie 4 speed, I need to make custom shift cable mounts as well....

I put the muncie 282 from an 88 fiero into a 96 monte carlo with the 3100 motor. I also put a getrag 282 from a 92 beretta into the same car.. i tested both.. the muncie from the fiero's in my opinion is def better and the slave cyliander is much easier to work with.. But in the way of finding them as far as i know they did only come in some 87 and all 88 fiero's the 87 gm helm manual hardly even mentions the tranny... but the full rebuild is in the 88 manual..

If you dont mind me asking where are you from?? i might now where to find one thats why im asking..

From Winnipeg, Manitoba, Canada

[Superdave]

I can tell you from direct expierance, the HM282 does not like to shift above 6K RPM. I have one behind a 3400 in a 91 Z24. Curtis (turboz24) also had problems with his shifting that high. IIRC max input shaft RPM is 6200 or so.


It's not terrible but it deffenetly slows down your 1-2 shift, 2-3 isn't bad and 3-4-5 is fine. Mine never saw anything above 7K RPM tho, i can't imagine what 8K would do to it... haha

[Joseph Upson]

According to the Fiero forum the Getrag has 7000 rpm shift limit if that, so 8000 rpm is out of the question and others are already having trouble at 6000rpm. One member described having to wait for the rpm to drop below 7000 rpm to shift.

I believe East Coast Fieros are using the 5 and 6 speed transmission from the Nissan NSX along with an adaptor plate. You may want to give them a try because the NSX tranny is definately a high reving shifter.

[Paulie02]

i dont know about the shifting above 6 grand cause i have my redline at 6200 but in the way of finding a muncie there is a guy named i beleive Bob Parker he owns a fiero grave yard in Ct he can get you a 5 speed muncie 282 for about 1000 bucks i think he has a conversion package for about 1200.. but here is his number [860] 642 - 4362 dont know if it helps or not but either way... I used a 6 pluck ceramic clutch in mine with a nice pressure plate and i know someone that will make one for you if you need for about 300 bucks [dont quote me on that but it should be right around there] but ive never messed with the northstar motor all that much so i dont know all that much about it...

[fiero_silva]

Who would have thought, a somewhat close Canadian has a few G6 6 speeds for sale

Anybody know what it takes to bolt the G6 6speed to say a 2.8l, or a LQ1 for exemple? Do they bolt up?

[RacerX11]

Bolt up to the engine? Yes. See page 1 for the rest of the details.

[Doubt_Incarnate]

acura made the nsx, its going to really hard to find a nissan nsx tranmission. like getting my dog to "meow"

[Paulie02]

here i will make finding the NSX tranny really easy

http://www.westcoastfiero.com/transmission/transaxle_installed.html

these guys put 5 and 6 speeds into feiero's and they are NSX trannys it cost a small fortune but they take about 450 hp and they have a nice gear ratio... so they should be faster off the line then the muncie but you gotta get the power down and if your building a high reving northstar motor you might not want such a gear ratio....