I don't know if this is with my car or everyone elses. But this is something for you to try. lets say your driving down the highway at oh 70mph and you push the button to turn your o/d off the car will obviously down shift. now once the car has shifted out of over drive push the gas pedel down, but not enough to make it down shift into the lower gear. The car will now start pulling hard with the o/d off. While the car is pulling push the o/d button back in. My car at least has a boost in power, it will jump a good three to four hundred rpms. It does not down shift because i could still floor the car and it would do that. I don't know if there is a reason for all of this or if my car is just a little abnormal. If anyone elses car does or dosen't do this i would like to know or if someone knows why it does this i would like to know. So please respond either way.

 

yeah it does feel like a good step up in accel, howevere no matter what ways u push the pedal on an automatic it will accelerate the same unless u have more hp or just dont push the peddle at all.

 

I just did this the other day ..6 times to make sure i was not nuts.. I was wondering the same thing it has to do with the TC lock up

 

yeh man, i have been doing that alot lately. i guess holding out the gear makes the car a little faster.

 

i usually keep the O/D off when getting on to the highway until i reach 70mph, then i hit the button and its all smooth sailing

Ant

 

I just keep it in third.

 

you buncha sissies with automatics!! j/k

 

this is an automatic post only, no 5 speeds ALLOWED! jk. haha

 

I don't know if this is with my car or everyone elses. But this is something for you to try. lets say your driving down the highway at oh 70mph and you push the button to turn your o/d off the car will obviously down shift. now once the car has shifted out of over drive push the gas pedel down, but not enough to make it down shift into the lower gear. The car will now start pulling hard with the o/d off. While the car is pulling push the o/d button back in. My car at least has a boost in power, it will jump a good three to four hundred rpms. It does not down shift because i could still floor the car and it would do that. I don't know if there is a reason for all of this or if my car is just a little abnormal. If anyone elses car does or dosen't do this i would like to know or if someone knows why it does this i would like to know. So please respond either way.

If I am correct, you are comparing the acceleration of your car with OD off and OD on, at 70mph? If so, no ****. You are comparing the acceleration of your car between 3rd gear and 4th. Obviously because of the lower gearing, 3rd will accelerate harder.

If not, then it's probably electronic programming to make the propensity to produce more torque through torque convertor lock up.

 

Keep in mind it won't downshift to 2nd near 70 MPH because the auto trans redlines in 2nd gear around 75 mph. There'd be no point to downshift to a higher RPM and probably lose speed because you'd be out of the power band.

I leave OD on 90% of the time. Rememember that stress on engine components increases exponentially with RPM increase. More strain on connecting rods, bearings, piston rings, and valves. I try to keep my RPM's under 3500 for accelerating and 2500 for driving (abt 72mph in OD). That's still fast enough for normal driving, and I need my Max to get me through college and beyond...so I can't push her too hard with 156k miles...

Maxie can still get up and GO when she needs to though.

 

Go to Level Ten's website regarding the transmission shifting from 3rd to Overdrive. What you describe is a normal occurrence and apparently its due to some underengineered parts.

The RPMs shouldn't spike up when you shift up in gears.