matty350TPI

Ok I have an 88 IROC with a 10 bolt posi with drums. I have a 9 bolt posi with discs and 3.45 gears in it that I am going to be changing into it. No help me with the installation. Should it just bolt right in and brakes hook up an everything? Will I need another master cylinder cause I have gone from 88 drums to a disc setup? Any advice will be appreciated.

Thanks

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1988 IROC-Z T-Top "MATTSTOY"
350 Crate engine
370ft. lb Torque STOCK
5speed Centerforce clutch, Spohn Sub-frames, Jamex 1.5 Lowering springs, 2 1/2' Exhaust,ram air setup

deadbird

It will bolt directly in & you'll supposedly need a proportioning valve from a disc brake car.

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BLACK Z

Does it have aluminum calipers? if so the drum brake cars and these use the same masters, the 88 and older rear disc used a diffrent master. I ran the 88 disc set up on my drum brakes master and it worked fine though. I did teh same swap and it went right in. You will need a diffrent p vavle though.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

FiReBReTHa

help me with this guys,
i have no idea so im posting it allot.

i have a 91 pont firebird with a 305
i know nothing about it stock....

but someguy is selling

"it is out of 88 formula350 its either 308or 327 did the drive shaft turn thing..95000 miles. it is perfect no noise comes complete
with torque arm lower control arms disc brakes calaipers a couple of friends of mine
went into the tens on these rear ends?
they have 27or 28 spline axles it is posi it works good." "its a 9 bolt"

Thanx!! its for 250$

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BLACK Z

I would buy it, since it is a 88 you probably will have the same problem as this guy with the calipers, The gear ratios for that rear are 2.77, 3.27,3.45 which is what I have, and there is a 3.70,

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

Biochem

I would bet it is a 3.27 ratio. That is what I have (lucky, so I didn't need to change the tranny gear from the 3.23). I got the e-brake cables along with mine, which helped a bit not having to deal with those. I got new PowerStop cross drilled rotors, re-built the calipers ($5 kit), and changed the fluid while it was out.

While I have an adjustible proportioning valve... it isnot under the hood, but still in the back seat of my car. I think my front brakes are working more then they should be, but the car stops fine. I hope to get it in sometime this summer.

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

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82 TRANS AM

Matt, should be a good swap if you like the brake line thing. I just did that swap with a 3.27 9-bolt but instead of spending about $500 in brake parts (i needed calipers, cables, hoses) along with the p-valve and master, i put the drums on the 9-bolt. Cost me $0 and my car does'nt know the difference. A little welding involved, but it was pretty simple.

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Kenney
82 Trans Am WS7 notchback
83 Trans Am WS6 T-tops
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