My steering rack is going out and I went to the data plate under the hood of my 90 model 740 to identify my rack, only to find that the bottom right space is empty.
I looked under the car and noticed that the boots on the existing rack come to a tight closure direclty around the steering rods without a "disk, plug, or bushing at the end" as the ZF racks are described as having.

So that leaves me with CAM or TRW. Any help out there determining which of these I have?

You can use this pic.

http://www.brickboard.com/FAQ/700-900/Steering.htm#RackIdentification
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Post Back. That's whats makes this forum work.

If you are going to replace the entire rack, it doesn't matter. Complete assemblies are interchangeable. I replaced a ZF with a TRW, and it worked just fine. It only makes a difference if you need to replace a tie rod, or a boot or some other part. These components are specific to each brand.