Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Glorified Monza drivetrain?

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Old 03-19-2011, 10:43 AM
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Car: '88 IROC Vert
Engine: 305 TBI
Transmission: T5
Axle/Gears: 3:08
Glorified Monza drivetrain?

Any Chevy gurus out there know why GM used such a difficult-to-upgrade non traditional rear end design with the weakly T5 transmission?(besides cost!)

The drivetrain layout seems too close to a Saginaw 4 speed spindly rear end Monza I had in the 80's.

If I want to put a street carb'd 400 and keep the manual trans, it's T56 time with a $2500 9" or 12 bolt eh? Jeez.

Thanks for any old trivia on the above.

'88 IROC-Z28 T5 LO3 Vert w/imminent 400sbc swap (with missing straight across 3rd starter bolt hole drilled for 153t 400 bal flywheel)
Old 03-23-2011, 10:14 PM
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Car: 1986 iroc Z-28
Engine: "LB-9" TPI 305
Transmission: 700-R-4
Axle/Gears: corporate 2:73-1
Re: Glorified Monza drivetrain?

because,they already had the design(monza)AND because it was......CHEAPER to build
Old 03-23-2011, 10:45 PM
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Car: 1991 z28
Engine: Turbo 310
Transmission: T56
Axle/Gears: D44
Re: Glorified Monza drivetrain?

the TQ arm set up is not expensive to upgrade, and it flat out WORKS. but yes the 10 bolt rear end is weak....
Old 03-25-2011, 09:11 PM
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Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
Re: Glorified Monza drivetrain?

s60 is yet another choice
Old 03-26-2011, 09:53 PM
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Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Glorified Monza drivetrain?

Torque arm rear suspension is very versatile. You've got people drag racing and autocrossing with the exact same suspension, not even only teh same design but the same car without changes and having a blast at it.

It would be nice if we had a IRS with the pumpkin on a transverse leaf spring setup like the Corvettes, but that's too expensive for a pony car.
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