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LT1 rearend strength

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  • #1

    LT1 rearend strength

    I have the stock 10 bolt rear end in my 96 T/A. I dont have the performace axles because I had the 2.73 gears stock. Now I have 3.73 gears and contemplating putting a 2800 stall in. My question is weather the rearend and axles will hold up fine with the power going to them. I will also have a hot cam kit soon so would the rearend still hold up with that?
    thanks
    tom
    1996 Trans Am:T-tops,graphite leather,16" chrome T/A rims, Nitto's, Descreened MAF, Morosso CAI, hypertech, flowtech cut out, 1LE elbow, Silver BMR tubular SFC's, 160 thermo, limo tint, harwood ws6 hood, !side molding, Stage 2 trans.

    Looking for a driver side window.
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  • #2
    All axles from the factory are the same. The performance rear option substituted a 3.23 gear in place of a 2.73 on automatic transmission cars. That's the only difference. As far as strength, auto transmissions are more forgiving than manual transmissions on the rear end. Many guys are running low 11s with automatics and they hold together yet many stock M6s are breaking the rear.

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    • #3
      WHat youre running for tires is a big factor too. I was running into the low 12's with drag radials, M6 and about 500 HP. The stock 10 bolt was holding together. I am moving on to slicks now, so the 10 bolt has gotta go.
      96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
      11.6 @ 123mph (1.6 60' - getting there )

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      • #4
        ...what strength?

        I don't think I would be inclined to launch at 2800/3000 on a 7.5 rear with slicks or drag radials too often. I wouldn't put too much faith in that!
        '77 K5 rock-crawler project
        '79 T/A: WS6, 400 4sp, 40K miles; Completely stock and original
        '87 Lifted 3/4 ton Suburban (Big Blue) plow truck
        '94 Roadmaster Wagon (The Roadmonster) 200,000 miles and still going
        '97 T/A: (SLP 1LE Suspension, SB, & sfc(s), Loudmouth); 4.10s; B&M Ripper; R/A Hood; ZR1s
        My daily drivers: '06 Jeep Liberty CRD (wife); '01 Yukon Denali XL (me); '03 Stratus Coupe (me)

        I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
        Thomas Jefferson

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        • #5
          I've got 3.42 gears behind a ~2800 stall convertor (basically stock motor) and haven't seen anything break or wear out other than tires

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          • #6
            Like said before...... the stock 10 bolt is a simply a gamble. Most of of the time you will lose.......but sometimes you will win.

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