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Discussion Starter · #1 ·
Hello all,

I have to change my rack and pignion on my 1991 vette.
when I look at the most common online shop I can find two references

for sample:
http://www.parts123.com/parts123/yb.dll?parta~partsort~A2~cadefibF

or

http://www.rockauto.com/catalog/raframecatalog.php?carcode=1430520&parttype=7388

or

http://www.zip-corvette.com/GroupDetails/SubGroupResults.aspx?gid={a3eaaaec-8f94-49c3-b6f9-8cd7993ec349}&SearchType=_GROUP_SEARCH&GroupName=Rack+%26+Pinion+Assemblies&

My prefered choice would be to buy using rockauto (less expensive) but how to choose the right one ? is it based on the options of my car ? zip indicate std sterring or sport steering ....

I hope you can help me

thanks
Gilles
 

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Both racks will fit just fine. I put a 91 sport unit in my 96 as they no longer offered the sport rack after 91. The difference is slight, but the sport unit is slightly harder to turn as the ratio is shorter/quicker. I love my sport rack, but I also autocross my car. If you are worried about the extra resistance of the sport rack, get the standard rack. If you like a more sporty drive/feel, get the sport rack.
 

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easy way to tell the rack in your car.
start with tires turned to the full left. turn them to the full right. if it takes you 2 and 1/4 turns it is the Z51 rack. if more it is standard.. but both will fit in your car.
 

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Discussion Starter · #4 ·
thanks for your reply :thumbsup:

but as the steering is out of order I can't count the number of turn :surprised

I heard that with the FX3 option the rack is always the same type..... but is it the normal or the sport one ?
 

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With a quick search, yes, it looks like the FX3 came with a quick ratio rack in '90 and '91. :cheers:

For a quick check, you should have the RPO code "B1X"

To find your RPO code, check under the center console, or the left rear storage bin.
 

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With a quick search, yes, it looks like the FX3 came with a quick ratio rack in '90 and '91. :cheers:

For a quick check, you should have the RPO code "B1X"

To find your RPO code, check under the center console, or the left rear storage bin.
I think you are wrong ... have a friend with a FX3/ZF6 and his 90 had the standard rack

another 90 I parted with z51/fe-7/zf6/fx3 had larger sway bars, FE1 springs and quik ratio 2 1/4 rack
 

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I believe there are a couple members on this forum that have gone through 1 or 2 after market racks in their C4's before they got one that didnt leak or have any issues...

Good luck hope you get this straightened out!
 
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