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2004 Joe Gibbs Silverado 5 speed to T56 swap

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Old 08-08-2011, 11:08 PM
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[QUOTE=dknoerzer;4749466]
Originally Posted by zachm89
very nice! sometimes i wish i had the luxury of a light weight single cab or even a 4th gen with a t56 just for the fun of banging through the gears... I think a couple people have already tried fully built t56's in heavy *** ext cabs and the results werent pretty...just too much weight for the trans to handle.

QUOTE]

I want to do a manual conversion to my 07 burb 2wd this winter. T56 is a no-go, eh? I don't want to do a body lift for the nv4500 or the zf s6-650. I plan on keepin the factory center console if possible and have the shifter come through where the cupholder is. Could it work to make a floor cutout and hide it under the console?
good luck with any manual swap. that generation truck didn't have a manual option. i give you props if you do it and succeed. it would be the first in that generation trucks to be done
Old 08-09-2011, 12:47 AM
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[QUOTE=5speedsilverado;4749940]
Originally Posted by dknoerzer

good luck with any manual swap. that generation truck didn't have a manual option. i give you props if you do it and succeed. it would be the first in that generation trucks to be done
Daryn C has an 07 nnbs Silvy with a t56 in it. I think he swapped back to an 80e tho IIRC
Old 08-09-2011, 08:13 AM
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I googled t56 upgrade and I looks like I can build it to handle more power or weight than a burb with a stock or eventually built 5.3 could throw at it, but I understand you get what you pay for too. Maybe I could find a good deal on a built unit from the ls1 guys. It looks like the computer mods are pretty easy for the older trucks, but any thoughts on my traction control? Is that even hooked up to the tranny at all?

I'm also planning on a 14 bolt swap, initially with factory 4.10. What kind of gear will I need though? Would a 4.10 or 4.56 put me close to factory performance, maybe a 4.88 for a performance feel? Currently stock 3.73.

Side note: How do I do quotes in the nice neat boxes? My previous post was funny-lookin.

Thanks guys.
Old 08-09-2011, 08:44 AM
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Originally Posted by dknoerzer

I'm also planning on a 14 bolt swap, initially with factory 4.10. What kind of gear will I need though? Would a 4.10 or 4.56 put me close to factory performance, maybe a 4.88 for a performance feel? Currently stock 3.73.

Side note: How do I do quotes in the nice neat boxes? My previous post was funny-lookin.

Thanks guys.
I have 4.88’s in my RCSB and its just right, I run about 1800 rpm at 70 on the interstate in 6th. I wouldn’t go any less in a big suv since you’re heavier than I am, might make 6th gear unusable if you have a stock 5.3. Everyone is always surprised at first when I tell them I have 4.88’s but keep in mind an F-body T56 has a 2.66 first gear and a double overdrive, plus these trucks have much taller tires than the cars….

Oh and you can get the neat boxes by hitting the 'quote' in the post you are responding to instead of reply.
Old 08-11-2011, 09:16 AM
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Thanks. Yea, 4.88 does seem low but I guess it makes sense. I had 4.10's in a wrangler with 32" tires, but I think first was a lot lower, and with a strong headwind, 5th gear wasn't always usable. And besides, it was just plain slow, and that's not fun.
Old 08-16-2011, 10:56 AM
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[QUOTE=CHILLLLLL;4749984]
Originally Posted by 5speedsilverado

Daryn C has an 07 nnbs Silvy with a t56 in it. I think he swapped back to an 80e tho IIRC
do you have a link?
Old 02-12-2013, 10:38 PM
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Where the electronics plug and play? Or did you have to splice or pin out the ECM for the T56 to hook up right?
Old 02-13-2013, 11:53 AM
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What did the T-56 come out of?

Thanks.
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