To get mine out I used a hand operated hydraulic gear puller (pusher). Worked very well. Maybe you could hire one? Brand i have is 'Sykes Picavant'

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E23 735i; E30 318i; E32 735iL; E38 735iL; R50 Cooper; R55 Cooper Clubman.
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E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i