M5/M6 Steering box

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basler
Posts: 25
Joined: Jan 21, 2010 1:49 AM
Location: so Cal

M5/M6 Steering box

Post by basler »

Hi All,

I recently purchased a red-tagged steering box sourced from an e24 M6 to put in my 87 535i. This is real deal with the 2225 120.0 red tag. 

As my mechanic prepped the box for installation he checked the steering ratio: 3.5 lock-to-lock, exactly the same as the stock 535i. It's supposed to be 3 turns lock-to-lock.

Per the recommendation of a forum member the swing length of the pitman arm was measured and compared. Exactly the same.  So the lock to lock uninstalled measurement is the true ratio. 

Does anyone know what's going on? Were there M cars with 3.5 turn steering ratios?

Thanks. 
jdb
Posts: 156
Joined: Jan 01, 2007 6:56 PM
Location: Humboldt County, Ca.

Re: M5/M6 Steering box

Post by jdb »

I have a 10-84 M635csi that is 3.5 turns lock to lock.
So yes there are M cars with 3.5


Jeff
basler
Posts: 25
Joined: Jan 21, 2010 1:49 AM
Location: so Cal

Re: M5/M6 Steering box

Post by basler »

That's helpful, thank you. 

Does your car's steering box have the red tag with 2225 120.0?
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