P.S Ah ain't no sassenach!!! Born n' bread CLYDEBANK, home of the Shipyards!!!

Regards
Dave M
Evening,or is it morning, all,
I've looked in the archive for info on this but to no avail, the question is: can a 5 speed autobox, a la E38, E34 etc, be fitted to an 89 730 E32?
The real reason I ask is that the top ratio on the 4 speed is 1:1, and for relaxed cruising an overdrive ratio 1:0.74 would really boost fuel economy. An alternative would be to alter the ratio of the existing box, but that seems a bit of a nightmare.
Before anyone suggests changing the diff. ratio, that's a no no as I don't want to lose what acceleration there is.
I was surprised not to find any references to this, or is it just obviously such a crock of sh!t to everyone else but me. :¬(

Thanks in advance
Al Stirling(UK)
89 730i SE