Thread: new to sbc

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Good, you're already one step ahead of me then =P

Which tranny are you refering to though?

People are absolutely DESTROYING 1st and 2nd gears with built 350s in Fieros with stock trannys, and some with Getrag 5spds, pretty much you gotta do something drastic, or your trans-axle has to be lady-driven...

I hear the 4sp muncie is slightly stronger than the getrag so thats what im going to run. I think people start grenading stock trannies at like 500hp

Hmm, yea, the auto is supposed to have more bojangles in it, but 500hp on stock trans-axle? Not a chance, if you go north of 250-275 ft-lbs of torque and bag on the stock tranny too much you can bet on de-toothing your gears in an awful hurry.

That trans-axle is built to withstand a 2.8L V-6 135HP Iron duke, not the sturdy supercharged L67, and NOT a torque-happy 5.7L V-8, I think the LQ1 twin-dual cam you already have is about as powerful as you can get while being able to COMPLETELY bag on car with a stock trans. You know, hard launches, clutch drops, violent shifting, drag-strip stuff.

Originally Posted by nfswift

Hmm, yea, the auto is supposed to have more bojangles in it, but 500hp on stock trans-axle? Not a chance, if you go north of 250-275 ft-lbs of torque and bag on the stock tranny too much you can bet on de-toothing your gears in an awful hurry.

That trans-axle is built to withstand a 2.8L V-6 135HP Iron duke, not the sturdy supercharged L67, and NOT a torque-happy 5.7L V-8, I think the LQ1 twin-dual cam you already have is about as powerful as you can get while being able to COMPLETELY bag on car with a stock trans. You know, hard launches, clutch drops, violent shifting, drag-strip stuff.

actually its the other way around, the TH125c auto 3speed is a piece o crap. Thats what I have now, and my LQ1 is border line blowing it apart. The 4-speed muncie and 5sp getrag have been proven to handle 400hp+. The iron duke is actually the 2.5 4cylinder engine and came with an isuzu 5sp that would prolly blow apart with a V8 but is still stronger than the stock auto

Originally Posted by ThirtyTwo

actually its the other way around, the TH125c auto 3speed is a piece o crap. Thats what I have now, and my LQ1 is border line blowing it apart. The 4-speed muncie and 5sp getrag have been proven to handle 400hp+. The iron duke is actually the 2.5 4cylinder engine and came with an isuzu 5sp that would prolly blow apart with a V8 but is still stronger than the stock auto

Gah, I was throwing the slang around, you know what I mean, the 2.8L V-6 that came stock in Fieros, and I WAS refering to the Muncie, the 3 speed auto should never be mentioned in the same sentance as Fiero...

I'm not surprised the LQ1 is giving you grief with that ugly tranny between it and the wheels =\ And the Muncie/Getrag CAN be driven with powerful engines, but have also been proven to make like Hiroshima after 6-10 clutch drops, even granny driving it you replace them every 15-20k. If you're honestly shooting for a 400hp performance build, look elsewhere, stocks are NOT suitable for this kinda application, trust me.

thats why i suggested a 283... they're easier on the tranny because they aren't as torquey of an engine.... and make the main amount of power at higher RPMs so you wont load up the tranny as much... i've seen a lotta 350 fieros and everyones always complaining about the tranny being destroyed frequently