Very interesting! I just had a loaner f30 328i and when I got my AH3 back I was blown away by how smooth the 8 speed is and how many times it shifts, in this car it seems like the rpms are always so low no matter how fast you go! This is the nicest ZF transmission I have ever driven, that is for sure...
Or, if you commute on a hilly freeway (I take 280 through Palo Alto hills to Cupertino every day) your rpms can look like this pic
Quote:
Originally Posted by SamS
Did you guys know that the AH3 (as well as AH5 & AH7) uses the heavy-duty ZF 8HP70 transmission, that is rated to handle 700nm (516lb-ft) of torque?
The actual part description is GA8P70H With the H designating Hybrid use, with the electric motor in place of the torque converter.
The standard 3-series (along with other BMW N20/N55 vehicles) uses the GA8HP45Z which is rated to 450nm (331lb-ft)
Other BMWs which uses the heavy duty version are the 550i/650i750i, the GA8HP70Z. No doubt to accomodate the additional power of the N63/N63tu V8.
http://en.wikipedia.org/wiki/ZF_8HP_transmission |