Power steering pump

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Dec 9, 2003 | 10:53 PM

Tibo

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Joined: Jun 2003

Posts: 5,028

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From: Desert

Car: 1991 Z28 Vert

Engine: 383 single plane efi

Transmission: T-56

Axle/Gears: 8.8 with 3.73s

Power steering pump

I was wondering if there was a diference between the IROC/GTA power steering pumps and the regular RS/firebird/formula/Z28 pumps. I heard that the IROC/GTA had different ratios which allowed them to turn faster. I performed a search and didn't find what I was looking for. Thanks

Dec 10, 2003 | 08:46 AM

pskel350

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Joined: Aug 2002

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From: SW Michigan

The power steering pumps are all the same IIRC. now the power steering box has different ratios. I dont know exactly what cars came with the higher ratio for quicker turning, but i know i got mine out of a 92 z28.

Dec 10, 2003 | 01:25 PM

300hpse

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From: Englewood, CO

Car: 1990 Trans Am

Engine: Lb9

Transmission: factory T5

Axle/Gears: 3.08 limited slip

its like the same p/s pump gm used on a lot of stuff for a long time. This weekend im getting rid of my leaky pump with a pump from a 455ci electra (late 70's). The only difference is the bracketry. But anyway the only changes in thirdgen pumps would be the pulley, if it were from a v-belt or serpentine setup.