Various power steering schemes - Saturn Astra
The Saturn Astra had several power steering schemes, with two main steering racks ZF and TRW; the former was generally used for "higher performance" versions (BUT not all XR models had the ZF).
TRW used round fluid tanks (ZF fluid tanks were roundish with 2 flats). These are wired differently too.
The inner tie rods differ on the systems, I think.
***Some rack part numbers.
93179548 - Without quick-ratio. Astra. Without non variable steering.
93189018 - With quick-ratio. Astra. With non variable steering.
***Some pump part numbers
93179568 - Without quick-ratio.
93196804 - With quick-ratio. (replaces 93181657, 93181659, 93196064)
https://parts.folsomchevy.com/oem-pa...-gear-93189018
Check part numbers with your Chevy dealer using VIN numbers to confirm fitment.
***SOME RPO CODES
NR1 STEERING POWER, NON-VARIABLE RATIO, ELECTRIC HYDRAULIC REDUCED RACK TR
NS1 STEERING POWER, NON-VARIABLE RATIO, ELECTRIC HYDRAULIC REDUCED RACK TR
NS2 STEERING POWER, NON-VARIABLE RATIO, ELECTRIC HYDRAULIC
***THEORY OF OPERATION
https://charm.li/Saturn/2008/Astra%2...on%20%28ZF%29/
https://charm.li/Saturn/2008/Astra%2...n%20%28TRW%29/
***REPLACEMENT STEPS
https://charm.li/Saturn/2008/Astra%2...nt%20%28ZF%29/
https://charm.li/Saturn/2008/Astra%2...1%2C%20NS2%29/
TRW used round fluid tanks (ZF fluid tanks were roundish with 2 flats). These are wired differently too.
The inner tie rods differ on the systems, I think.
***Some rack part numbers.
93179548 - Without quick-ratio. Astra. Without non variable steering.
93189018 - With quick-ratio. Astra. With non variable steering.
***Some pump part numbers
93179568 - Without quick-ratio.
93196804 - With quick-ratio. (replaces 93181657, 93181659, 93196064)
https://parts.folsomchevy.com/oem-pa...-gear-93189018
Check part numbers with your Chevy dealer using VIN numbers to confirm fitment.
***SOME RPO CODES
NR1 STEERING POWER, NON-VARIABLE RATIO, ELECTRIC HYDRAULIC REDUCED RACK TR
NS1 STEERING POWER, NON-VARIABLE RATIO, ELECTRIC HYDRAULIC REDUCED RACK TR
NS2 STEERING POWER, NON-VARIABLE RATIO, ELECTRIC HYDRAULIC
***THEORY OF OPERATION
https://charm.li/Saturn/2008/Astra%2...on%20%28ZF%29/
https://charm.li/Saturn/2008/Astra%2...n%20%28TRW%29/
***REPLACEMENT STEPS
https://charm.li/Saturn/2008/Astra%2...nt%20%28ZF%29/
https://charm.li/Saturn/2008/Astra%2...1%2C%20NS2%29/
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