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3rd is 1:1, 4th is 1:0.73.... 4hp22 &24 (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Max Fretter (NZ 87 735i) on February 17, 2002 at 22:16:24:

In Reply to: 5-speed autobox swap posted by Al Stirling on February 17, 2002 at 14:37:37:

Al, dunno where you got your info, but it's wrong... 730 had the same tranny as my 735 and 4th is an OVERDRIVE. True, there is also a lockup, "1:1" clutch in the torque convertor, but that still engages in 4th...

Max


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




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