Z-Powered

I've noticed that occasionally when I'm on the highway and downshift to pass someone, the tranny goes into 3rd gear normally, but as I start to get on the gas, the revs actually drop for a second but the car is accelerating. It's kind of hard to explain, so I have a video of it. Video.

The video's not so clear, so this is what happens: I shift to 3rd, then the revs go up to about 3,000 RPM. Next the engine revs to 3,400 RPM as I press the gas, then goes down to about 3,100 RPM. (All this time the car is still speeding up) After that, everything goes back to normal and the revs keep increasing.

I would say the tranny's slipping, but it's doing the opposite of what a slipping tranny does. Usually the revs increase while the speed remains constant. In the video, the revs are decreasing while the speed increases. Any thoughts?

OneSexyLeo

iTrader: (4)

Mines did the same thing....after goin into 3rd, it would rev to 3300 and then drop to 3100 and be normal the rest of the way. I was told it could be a problem with TC lock-up but not for certain.

Hell, I don't even know if it still does that. Haven't paid it any attention but I dont think it does.

Does it feel like its taking a long time for it to shift into 2nd?? Slow shifting??

Z-Powered

^ Thanks for the reply. Only the 2-3 shift feels slow. Did your shift kit fix the 3rd gear issue?

cmax1

are you shifting the car from D to 3rd or is it doing this on its own?

Z-Powered

^ From D to 3rd.

cmax1

if your @ highway speeds the trans supposed to be in OD with the shifter in D, then you throw it into 3rd (which would take you out of OD) giving you the higher rpms. OD keep your rpms low @ highway speeds. Take the car out on a open road going over 40 mph and shift from D to 3rd and notice the rpms jump up..

Z-Powered

^ I know, but the revs go down at first when I get on the gas...
I thought that was a little unusual.

cmax1

maybe a tune issue with worn plugs or maf need cleaning or replacement. Doesnt sound like a trans issue though. If you dont manual shift it runs fine correct.

Z-Powered

^ I'll have to try it out with the tranny in D. I manually shift into 3rd to pass someone out of habit because my Celica was so slow. (125 ft/lbs of torque slow)

Scottwax

iTrader: (8)

Looks like there is some slippage when you first get on the gas and then as it catches the rpms go back down to what they are supposed to be.

Z-Powered

^ Never thought of it that way. But the revs don't seem to rise faster than normal.

cmax1

thats why i was saying it maybe a tune up issue. not trying to hi-jack your thread with a pontiac issue but i had a bonneville that bogged down when the trans went into od. changed the plugs, wires and cleaned the maf and all was fine.

Z-Powered

^ Thanks for the suggestion. I'll check the plugs tomorrow.

OneSexyLeo

iTrader: (4)

Mines doesn't do that when I hit the gas. I would already be in 3rd gear. Once rpms climb up to 3400 they drop to 3100-3200 as if it loss power and then keep climbing. It does that in D and if I keep it in 3rd. But it ONLY happens in 3rd and not during shifts. My shift kit goes back in next weekend. I'll let you know if it works or not. It cleared up my problems with the last tranny but I didn't hook up my tranny cooler, so it toasted!!!! The kit was in for 8 months. Before it got bad. I also blame myself because I rode on the tranny for 9 months while it was slow shifting 1-2 and eventually it started spiking 2-3 all b4 I put the kit in.

Z-Powered

^ You mean the TransGo shift kit made your tranny overheat? Is a transmission cooler necessary?

Scottwax

iTrader: (8)

Lack of transmission cooler being hooked up cooked it. And yes, you absolutely need to keep the transmission fluid cool.

Z-Powered

^ So a tranny cooler is necessary if you get the TransGo shift kit? I've never heard that before. Thanks.

Scottwax

iTrader: (8)

You already have a tranny cooler as part of the radiator, that is enough-but you do have to have it hooked up properly.

jasonmax

iTrader: (2)

seems like tranny slipping