Transmission Question
Thread Starter
Member
Joined: Jan 2000
Posts: 276
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From: Lee's Summit, MO
Transmission Question
Usually this only happens in weather cooler than 70 degrees F. When I first start my car, it is really peppy. I get on the highway and get up to 60. Usually I run 60 right at 2000 rpm in OD. But instead of running at that, it runs anywhere from 2500 to 3250 rpm. When I put my foot down to accelerate even a little bit, the engine revs up another 500-1000 rpm and accelerates, where usually the rpms would slowly climb from 2000. Now here is the weird part: this only goes on for about 2-5 minutes. Then when I am at a constant speed or rpm, the car will act like it is shifting and go back to normal rpm (2000@60mph). It is almost like it has a 5th gear (I WISH!!!!). Could this be a problem with the torque convertor? This is really the only thing I could come up with. Any help would be appreciated!
Vman
------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000
Vman
------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000
Supreme Member
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
It's probably your TCC (Torque Convertor Clutch) solenoid that you're feeling, and that's normal.
TCC engagement, besides happening in a certain gear & roadspeed, is also determined by your engine's coolant temperature. If your motor's cold, the TCC won't engage.
Next time that happens (high rev's), keep your right foot constant on the gas, and tap the brake lightly with your foot (enough to kick on the brake lights)- the rpm's shouldn't change.
When you feel the RPM's drop (your 5th gear), then do the same thing. Your rpm's should go back up.
What you're doing is disengaging the TCC when you hit the brake. In the first case, since the TCC never engaged, there's nothing to disengage.
The TCC disengages when ya tap the brake because it makes the trans act like a manual tranny. If you leave the clutch engaged on a 5-speed when you come to a stop, the engine stalls. Same thing would happen if your TCC remained engaged when you stopped the car.
------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
TCC engagement, besides happening in a certain gear & roadspeed, is also determined by your engine's coolant temperature. If your motor's cold, the TCC won't engage.
Next time that happens (high rev's), keep your right foot constant on the gas, and tap the brake lightly with your foot (enough to kick on the brake lights)- the rpm's shouldn't change.
When you feel the RPM's drop (your 5th gear), then do the same thing. Your rpm's should go back up.
What you're doing is disengaging the TCC when you hit the brake. In the first case, since the TCC never engaged, there's nothing to disengage.
The TCC disengages when ya tap the brake because it makes the trans act like a manual tranny. If you leave the clutch engaged on a 5-speed when you come to a stop, the engine stalls. Same thing would happen if your TCC remained engaged when you stopped the car.
------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
Thread Starter
Member
Joined: Jan 2000
Posts: 276
Likes: 0
From: Lee's Summit, MO
Thank you for clearing that up. I thought that perhaps something was wrong! I will try that out ASAP. Thanks again for the info!
Vman
------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000
Vman
------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000
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