Boost Question

My 89 740 never gets above 1/4 the way into the yellow even at full throttle. Is this normal? I know nothing about these cars, so this could be perfectly normal, but I can't imagine that it is. Another question about normal operation. This is transmission related (automatic) When starting out, it dosen't seem to want to shift up from I'm guessing 2nd, until I actually let up on the throttle. Under 60, it downshifts very easily, crusing on the highway, it is like pressing down on an egg, just a little too much pressure, and it downshifts. Strange way to describe it I know, but that is the best I can do. That is all for now, thanks in advance!

Hi As far as the boost can go, it depends how much rpm it goes. Below 3000rpm it shouldn't go further than those 1/4. But reaching 3500-4000 you should read 1/2. I believe for an auto gearbox, only at top gear in highway is possible to get constant 4000rpm (170kph or 105-110mph), or up-hill in 1 or 2 selection. Since I'm not familiar with auto gbx, can't give good hints...but have you changed fluid recently?

Thx Telmo, no I have not changed the gearbox fluid since I got it.