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Thread: 4.8 with a manual

  1. #1
    Join Date
    Dec 2009
    Location
    Kentucky
    Posts
    59

    4.8 with a manual

    Ive found a truck for sale with a 4.8 5-speed that i have been considering but Ive just never seen much about the manuals on here before. Are they a very good transmission? Like able to hold more power than a 60e? and what exactly is the name of the manuals offered in the 4.8s its an 05.
    2000 RCSB 4.8
    -basic bolt ons but has ambition

  2. #2
    Join Date
    Aug 2007
    Location
    Castro Valley, CA
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    The stock 5 speeds cannot hold very much power at all. I think there called the nv3500. Basically there good enough for stock and that's about it. I wanted a manual truck, so I bought a 4.8 5 speed manual truck, and one of the first things I did was change it out for a t56 (6 speed) tranny. They come in the ws6 and as camaros. And in the vettes, but u can't use the one out of vettes in our trucks because in vettes the tranny is mounted to the rear axle basically. Regardless though the t56 can hold up to about 500hp. When I bought mine I had a couple of things done to it so it's good up to about 750-800.
    2004 4.8l 6 speed manual 2wd
    Looks: 22" foose rims with Fierce tires, SS front bumper, SS Front Grill, 2/3 lowering kit.
    Performance: Volant Intake, 3" exaust with Spintech muffler, Pacesetter LT's with Y pipe, TR cam 220/220 .551 112 lsa, T56 Tranny with the Keisler short Shift kit and LS7 Clutch, Quicktime Scatter Shield, ASP Underdrive pulley kit, Dyno tune by Rick at Synergy Motorsports
    Soon to Come:Eaton locker, Electric Fans..Does it ever End?

  3. #3
    Join Date
    May 2009
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    hot & windy
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    you don't see many on here because just about everybody here races their trucks not only is it not the strongest trans around, but it ain't got the best gearing for racing.

    that said - i love mine & won't buy another automatic if i can help it. it also ain't as weak as some people make it out to be (mostly auto guys anyway). i've only had it behind my 5.3 for a couple months, but i've talked to others who've paired it to 5.3s, 6.0s, built 350s, 454s, and even an 8.1. so long as you don't beat it to death, it'll be fine. heck - even the S/C joe gibbs 4.8 came with the nv3500 & it made 390hp/425lb-ft and a warranty. if you're going for a big-power build (& don't mind 2WD only), a T56 is a better choice, but for a DD with mild power, it's perfectly fine. i say go for it!
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  4. #4
    Join Date
    Dec 2009
    Location
    Kentucky
    Posts
    59
    Thanks guys i apprectiate the input. I had never heard anything about them but now i'll be able to go a lil deeper and see what eles i can find out. I knew that some of the RST silverados came with 5speeds but i didnt know the gibbs trucks did. I have a buddy with a Gibbs truck, automatic but Ive never really looked deep into it to see what all i did have.
    2000 RCSB 4.8
    -basic bolt ons but has ambition

  5. #5
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    6,994
    I'm rocking one, 2 things I dont like about it, the mile long shift throw and the wicked drop in the 2-3 shift
    2006 Silverado
    Little Black Bitch

  6. #6
    Join Date
    Aug 2007
    Location
    Castro Valley, CA
    Posts
    235
    Quote Originally Posted by sleeper1500 View Post
    I'm rocking one, 2 things I dont like about it, the mile long shift throw and the wicked drop in the 2-3 shift
    Are you rocking the stock 5 speed? You got to get a short throw shift kit for that thing so its not such a long throw. I put a hurst one in mine when it was stock with the 5 speed. They dont "technically" make one for our trucks, but one of the guys at my local speed shop hooked me up with one that worked perfect for my truck. I can look up the part number if ya want
    2004 4.8l 6 speed manual 2wd
    Looks: 22" foose rims with Fierce tires, SS front bumper, SS Front Grill, 2/3 lowering kit.
    Performance: Volant Intake, 3" exaust with Spintech muffler, Pacesetter LT's with Y pipe, TR cam 220/220 .551 112 lsa, T56 Tranny with the Keisler short Shift kit and LS7 Clutch, Quicktime Scatter Shield, ASP Underdrive pulley kit, Dyno tune by Rick at Synergy Motorsports
    Soon to Come:Eaton locker, Electric Fans..Does it ever End?

  7. #7
    Join Date
    May 2009
    Location
    hot & windy
    Posts
    1,117
    hurst used to make one - up til fall 08, i believe. i called them asking about it a couple summers ago & they told me they had one but were discontinuing it.

    i feel ya on the 2-3 shift though
    i thing 02+ should be able to do the drill mod
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

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