There is an abundance of information posted about steering rack swaps, but I haven't been able to find much specifically about the e46 TRW steering rack. I believe this is the most common e46 rack, yet everyone seems to use the ZF racks for their conversions. Is there a reason not to use the TRW rack?
What is the difference between the TRW rack and the purple tag ZF (7852974678)? I understand that the yellow tag ZF (7852974712 - "ZHP") has a slightly tighter feel due to the torsion bar design. This has me wondering if the TRW and purple tag ZF are essentially the same....