What up guyz?
Ok I know you've all noticed that when your in overdrive your limited to 100mph but when its off its go till red.....But i wanna know why is that? and what can I do to fix it? w/o O/D i can get up to 130mph then I switch to O/D and the damn car slows down...Every other A/T Ive driven if you switch into O/D at redline it still climbs...Just curious....






97' Eclpse GS 420A
MODS*****
AEM cam Gears
MSD ignition
Chikira 4-2-1 header
Custom 3" exhast
Pacsetter hi-flo c

Good question, cause I can hit 120+ with OD on.

I remember racing a cougar I hit like 117 or so with o/d off and though oh crap I forgot to turn o/d back on after 80mph or so, I flicked O/D back on and boom my speed drops to 100mph and goes nowhere. Still haven't figured it out but heres a rough explanation I came up with. Your straining out all you can of our third gear to get up to 115 so when you turn on o/d it shifts into 4th thus dropping the RPM's but since our cars aren't powerful enough that high we can't get any enough power out of 4th gear at that point to hold the same speed, thus our speed drops. That's just an idea I came up with but I'm not positive so don't quote me on that.

I don't know what the hell you guys are talking about. I reached 130 on I-75 before I had to break cause of traffic and my shit was in OD and still climbing. The only time I ever turn my OD off is before I race someone from a dead stop. I wouldn't try doing 100+ in 3rd in my car anyway.

He's right, O/D does slow the car down. I'm limited to about 110 in O/D and the second I click it off it hauls ass.

I keep saying this, but "The overdrive in our cars is to SAVE FUEL ONLY"

I think it has something to do with the tranny being allowed to slip at a certain temp while in O/D, but when you turn it off, everything locks back down and puts the power to the road. If you have a gauge you'll see your tranny temp is sky high in O/D at 100mph.

it's called converter lock-up folks. It can be disengaged. :thumbsup

u know when ur in OD and the rpm's drop, then drop again almost like it hits 5th? That is converter lock-up. It's for fuel economy, but def. not for performance. Most autos that race take the lock-up feature out or get a switch so they can control it.

Still doesnt explain why Dirty and I can reach 120+ in 4th gear with OD on...

what explanation are you looking for?

3rd gear hits redline at 120. after that, you need 4th gear to go any faster. the car will only go into 4th gear if OD is on, so of course youll pull 120+ with OD on.

what i do: leave OD off until i need to go over 120. If you have OD on, the car will shift into 4th earlier, at about 105mph or so, regardless if your at wot with plenty of room to pull in 3rd. Right before 120, flip the od back on, and keep pulling. This is of course racing, normally i just have OD on to help w/ fuel economy.

funny. my car will do 120 in L at WOT. they aren't fully selectable or whatever the right terminology is. U can leave it in L and floor it and it will still upshift without hitting the limiter or anything.

this is true.

Our computer will shift at the same point no matter where the shifter is.

Im talking about OD tho. If you leave OD on, the tcm will shift into 4th early. Leave it off, and the tcm will not shift into 4th and you can run 3rd out to 120 (thats regardless of where you have the shifter: L-2-D)

over drive sucks hands down.. it wont take u to 120 at all mind u its 5500 rpms with o/d on 110 mph

6500 rpms w/ od off is 130 135 thats the limit of our speed.. but with lock up disengaged ... that might do something more ..if we find a steeeeeep hill..lol

What kinda switch? i mean is there anyone who has the mod instructions? this is something that just bugs me i'd really like to get rid of it
thanks





97' Eclpse GS 420A
MODS*****
AEM cam Gears
MSD ignition
Chikira 4-2-1 header
Custom 3" exhast
Pacsetter hi-flo c:+

Take your wires and hook them up to a simple toggle switch, either flip or push button or whatever to control your O/D, there really isn't THAT MUCH too it unless your gonna try and mount it nice and flush into your dash or center console or something. Do a search I remember seeing a nice vfaq or something of the sort for doing a custom install into the center console.