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Spline Size

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Hello everyone,

I'm swapping an E21 ('81) non power steering rack into my '74 2002. I haven't been able to find any info about the size of the spline shaft that is on the steering rack. I haven't been able to find any information. I need this because I need to do some custom steering.

The picture shows from the top side obviously. I bought the other mid shaft part thinking it would work if I cut back the steering shaft. It won't. I need some aftermarket hot rod parts. But I need to know the spline size for a universal joint at the rack.

Any information would be greatly appreciated. Thank you!



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No other BMW has the same spline as a 2002. I have found that a series 1 Toyota Tarago has the same spline as a 2002. The Toyota has 3 uni joints in the steering column, but the bottom on gets worn, so best to just get the adjustable steering column from a wreck which will give you 2. The Toyota only has the unis splined at one end and so you will have to pull apart two to make one.

Now this works on a 2002, but what to do about getting it to fit to an E21 rack I don't know. I have seen this mod done on RHD cars, but they used a modified Ford Laser/Meteor rack. The angle of the 2002 steering column when connecting to a rack is virtually too great for one joint, and may be better with 2 joints sharing the angular change, as you have if you used the E21 rack and shaft that is in place now.

In the case of one race type 2002 the angle of the column was made steeper, bringing the column out maybe 6" below where it used to, so that the rack and column were more in alignment.

If the uni is at too great an angle, the steering will get a fast/ slow type effect as it is turned. A CV type joint would solve this and would be able to work at a greater angle than a uni. Perhaps get a steering CV joint used in racecars and have both shafts resplined to suit. Sounds expensive, but may be the best solution, or see if a Toyota Tarago rack will suit your application.

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