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Maintenance & Repair Transmission Traumas?
2410 messages, Last post on Nov 30, 2009 at 5:35 PM
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I have had a 98 Pontiac Grand Am for about 2 weeks now. It has the 2.4 liter 4 cyl so its suppose to have the 4T60E transmission. Well it won't go into 4th gear at highway speeds. First day I owned it the engine wiring melted and the dealer replaced the engine wiring harness. First, secnod, and third gears wortk fine. Fluid looks and smells good. What could cause this transmission not to go into 4th gear? It tachs 3,000 rpm at 60 mph in third gear, when I put it into drive, still at 3,000 rpm at 60 mph. Any help will be greatly appreciated!
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Replying to: ron528 (Aug 28, 2007 12:25 pm) If the car is going 40 in 3rd at light throttle the transmission should have the torque converter clutch lockup. Does it? You can test that by slightly accelerating and touching the brake pedal to make it think you're braking and the transmission should unlock the TCC and the motor speed will increase. It will speed up if you just push down a noticeable amount on the pedal with the 4T60 if I recall correctly. What happens there? Is the TCC locking up? It might be a sensor for temperature on the motor not telling the computer that the car is warm even if the thermostat is heating it up. The computer may use a different sensor from the one for the instrument panel.
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Replying to: imidazol97 (Aug 28, 2007 12:46 pm) The car is warmed up and the temperature guage is reading half-way up. I can feel the torque converter lockup working. Additional info: In third gear at 60mph, it tachs 3,000rpm. And when I let off the gas it drops to about 2,000rpm or 1,800rpm. Once I shift from "3" into "D", it remains at 3,000rpm under light load at 60mph. And when I let off the gas the tach drops to 1,000rpm almost instantly. Then to resume crusing you have to push on the gas and spool the motor back up to 3,000rpm. It is a very noticable thing that is not normal. I'm thinking something migfht have happened to the vacuum modulator if it has one? Any additional info will be helpful! Thanks!
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Replying to: ron528 (Aug 29, 2007 4:46 am) I dug out the 93 service manual for leSabre with a 4T60E transmission... my 98 leSabre only covers 4T65E. No 3-4 shift: control valve assembly; 3-4 shift valve (#362) stuck 4th clutch shaft; spline damage 4th clutch assembly; clutch plates burned, piston seals or piston damaged, clutch plates or piston mislocated shift cable adjustment The "shift cable" is the PNOD21 adjustment. If your car will start in Park and in Neutral, and you can select 1 and it stays in 1st gear, 2nd gives 1-2 upshift, 3 or D gives 1-2-3, that's probably not a problem. It's not an accelerator cable that adjusted the shift quality for engine power. I believe that's all electronic. If everything else is relatively good in shift quality and you're getting nothing in 4th, I doubt it's the stovepipe or clutchshaft they list; I believe people have roughness when that's not working or stripped. Good luck. I'm betting on a stuck/clogged solenoid valve in control body, but that's without driving it myself to sense what's happening.
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Replying to: imidazol97 (Aug 29, 2007 5:13 am) |
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Every time i drive it somewhere i get out of the car and this burning rubber smell is coming from the engine, any idea what i could be?
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Replying to: jaredloves90 (Sep 04, 2007 1:56 pm) |
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Replying to: jaredloves90 (Sep 04, 2007 1:56 pm) |
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Replying to: dnealy (Aug 07, 2007 7:31 am) David |
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| I think it may be the tcc solenoid when you go 4-5 mile down the road it shuts off when you come to a stop. recrank it cranks but when u put in gear it shuts off again. where is this located and is it easy to replace??? please help. | |
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Maintenance & Repair Transmission Traumas?
