transmission oil

[Viala]

Hello , I have always my transmission's problems and no time to check on the plug to see if TCC or others solenoids are working (my problem is that i can drive to 90 km/h but at 3500 tr/mn and the transmission doesn't shift to 4 th gear, I'm not sure if it is 4 th may be 3th. I don't remember the max speed you can get on third gear).
When I get this problem the oil smelt burn oil and the colour change a little.

So my question is , what is burning in a transmission ( clutches???)and is it
a bad sign and do I have to do an overhall, my rebuild transmission as only 25OOO kms.
Other question, if there is not enough oil what happens, the oil burns or the transmission doesn't work!

Thank you for your help

PAul

[knuckle ears]

My 93 tsport shifts at about 80kms/hr. Not sure of the RMPs at shift and not sure if 80kms/hr is correct.
I would think if the tranny is low and you are getting a burnt smell the clutches would be burning and also causing the oil to burn.

I had my tranny slipping when in reverse in the driveway and then slip when making a left turn. The oil level was low at the lowest hash mark on the dip stick. I then filled it up and it went away. I have aalso heard that GM did not get the calibration of the dip stick proper and could always be running low. They said I could over fill by 1/8. I took that as 1/8 of an inch over the full mark.
I would drain the fluid and replace the filter and then refill.

[maxwedge]

Originally Posted by Viala

Hello , I have always my transmission's problems and no time to check on the plug to see if TCC or others solenoids are working (my problem is that i can drive to 90 km/h but at 3500 tr/mn and the transmission doesn't shift to 4 th gear, I'm not sure if it is 4 th may be 3th. I don't remember the max speed you can get on third gear).
When I get this problem the oil smelt burn oil and the colour change a little.

So my question is , what is burning in a transmission ( clutches???)and is it
a bad sign and do I have to do an overhall, my rebuild transmission as only 25OOO kms.
Other question, if there is not enough oil what happens, the oil burns or the transmission doesn't work!

Thank you for your help

PAul

Not enough oil causes slipping and burnt fluid, get this checked out, you did not say what year, as usual on these forums, but a trans shop can check the internal workings with a scanner.

[Viala]

yes it is a TS 3800 1992 with a 4T60
In France it is not possible to scan the transmission , they said you have to change it...........

[LMP]

Paul...this is the transmission you had imported from America, isn't it? I would be tempted to think the problem must be somewhere else..at least, I'd hope. You have no CEL (no code 21 or 22...which inhibit 4th and OD and cruise)?...I think you would have checked for that already, but..just in case...
Also, a low engine temperature reading prevents 4th from engaging...the temp senspor fopr the engine is not the one for the gauge...so may be disconnect temp sender near throttle body and measure resistance ..at room temperature (20°C) it should read near 3500 ohms, and about 250 ohms when engine warm. www.avigex.ca/xport/thermistor.jpg

[Viala]

Hello LMP

what do you mean by:
[i][i][i]Also, a low engine temperature reading prevents 4th from engaging...the temp senspor fopr the engine is not the one for the gauge...
what is the gauge is it a sensor on the transmission.???
I really understand nothing to my transmission problems

Thank you

Paul

[LMP]

Transmission is kept in 3rd until engine has warmed up somewhat. THis is computer controlled. THis is based on coolant temperature --sensor located near throttle body - . (the sensor for the instrument panel needle is somewhere near the water pump...I think...not sure). In winter here, my Transport has to run for about 5 minutes before it will go to 4th. My Kia Sportage works the same way also.
However, TPS codes 21 and 22 can be diagnosed right away since you have a '93 and you can do the paperclip trick to read the codes...do you have the Check Engine Light ON?

[Viala]

Tomorrow I will read the codes and tell you
Bye

Paul

[Viala]

So I went on the motorway to try the transmission.I thought that the transmission could'nt shift on 4th from 3th, but in fact it is from 2 to 3 that the transmission don't shift.
When driving I was on OD, after I tried D and 2 and nothing change except engine brake on 2 when I quit the accelerator. At 60 mph the rpm is 3500 and stay the same on 2, D OD
I think the problem is important!
The codes are 21-36-41

If you have an idea thank you very much

Paul

[Viala]

Hello LMP on DTC 36 at the end of the page it is said "if a DTC 36 is set due to a ground CKT 1223 you will have 1st and 2nd gear operation only!
Is CKT 1223 a wire going from the PCM to the transmission, what is the color of this wire and where is it (on the plug of the transmission????)

It is late in Farnce so I stop for today

Paul

[LMP]

Yeah CK1223 is yellow-black wire going to pin G of the transmission plug
www.avigex.ca/xport/transaxleconnector.jpg

THis is the B solenoid...www.avigex.ca/xport/transaxle.jpg
Now this solenoid is ON for 1 and 2 and must turn OFF to shift to 3 and 4...
www.avigex.ca/xport/transmissionranges.jpg

so either it is kept ground on wire CK1223..either by a shorted wire contact to ground or shorted transistor in the computer (this transistor can be replaced)
...or the solenoid valve is stuck in the ON position.

[Viala]

If the valve is stucked in the position ON is it possible to change it by the left side under the cover , or is the valve inside the transmision?
Can I test the solenoid B from the pins of the plug and have a part of the answer of my problems
CKT 1223 is going from the transmission does this wire goes with the same color to the PCM

Thank you for your precious help, because if I can't repair, the car will go to the junk yard. Here in France thoses cars are rares
The car is now 13 years old and 280000 kms , I would like to continue with it
at least 100000 kms I don't know if it is possible.
Are they TS owners who never had problems? I suppose they are not on this forum.

Paul


Paul

[LMP]

THe solenoid is under the left side cover but the shaft goes through the cover and must be removed . TRy to disconnect the wire first or even test simply from the transmission side of the wire bundle with an ohmmeter to see if there is a permanent short. I doubt the wire itself has shorted..it owuld have had to be manipulated and skinned to ground..but a shorted transistor is a possibility. Paul Taylor on this forum had to change one and provided the part number.. "For future Reference the MosFet Transisitors used in the 3800 ECU are IRF530"
If this proves wrong, then you are left with a stuck solenoid....but dismantling all that stuff to get to it is something you have done before....

[Viala]

hello so I tried to understand something about th yellow black wire going from the transmission plug tio the computer plug and I have connected a multimeter on the bip position to schek between the two plugs.
On the multimetre I have no bip just the number 1 change , does this wire go to another plug or is direct from one plug to the other one.

Thank's for reply

Paul

[LMP]

Here is the diagram www.avigex.ca/xport/transaxle.jpg
It should be a direct contact from pin G of the plug that connects to the transmission to pin D15 that connects to the computer.
In between it goes through pin C2 of connector C110..on passenger side inner fender near the firewall.
Pin D15 of computer should read open circuit to ground with key off.