transmission oil

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

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.

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.

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...........

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

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

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?

Tomorrow I will read the codes and tell you
Bye

Paul

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

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

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.

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

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....

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

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.

Thank you LMP , I read the diagram and I see something named P 101 is it a rubber part to protect wires through the fire wall?
You write "Pin D15 of computer should read open circuit to ground with key off"
I am not sure to understand what to do , do you mean that if I connect Pin D15 on the plug to the ground I should read something. is open circuit a cut wire ?

I tried something else today , I put a wire on the Pin G to the + of the battery and another wire with a lamp from - to Pin 15 to see if the light was on ,( because the bip of the multimeter didn't ring)and When I did the contact I just eared a little click (injectors strange?!!) The light should have light on if it is a direct contact.

If you have an idea , I will try tomorrow again

Paul

I have posted an answer and I see nothing on the forum
So I write again
I tried to test the Yellow and black wire from plug G to Pin 15 with a 12 v lamp going from the - of the battery to the pin 15 and another from Plug G to the + to see if it is just one circuit ; and then no light just littles clicks at each connection (injectors .....?!!strange) does that mean that the wires are going somewhere else and have a relation with ignition , for me it is mysterious.On the diagram I see C 110 a lot of times at others places than the between PCM and Transmission are all thoses wires in the same plug.

Last question for today , if I apply 12 v on the pins of solenoids Do I have a chance to ear them.

Bye

Paul

P 101 is passage through the firewal.

C 110 is something like a 36 contact plug....that large connector that lies on the right ride fender near the top of suspension strut.

Pin D15 of computer should read open circuit to ground with key off. This reading must be taken with a multimeter, one probe on the computer pin, the other probe to ground, not with a test light. Reading should be "open", that is, infinite ohms, no contact. " MosFet Transistors used in the 3800 ECU are IRF530" (Paul Taylor said! )


.. + of the battery on the Pin G (of the wired plug) to a lamp between Pin 15 (of the wire plug) and ground (testing one end of the wire to the other end, right?)... "just eared a little click (injectors strange?!!)" ...I suspect erroneous identification of pins...this wire does not contact anything else if it is disconnected from both ends.

The solenoids have both sides to the connector: you must then apply + and ground. E is common, F,B,G are the other end of the three solenoids. I doubt they can be heard...but at least you can test them with the ohmmeter...probably around 20 ohms.

Hello everybody Merry Christmas

So it is Christmas to day and I tried to check my tranmission.
From the transmission plug to the computer , and after a mistake ( because there are two plugs with a black and yellow placed on the same place on each plug) I found no ground or cut wires.
So LMP wrote about a transistor in the computer , but the post of Paul taylor
is about Injectors .
I have check the solenoids A and B seems correct but the TCC one gives me 85 ohms it too much I think , but I don't know what does that mean, and if ther is a relation with the code 36 .

What could I do else

Thank's

Paul

Yeay..according to www.avigex.ca/xport/dtc36.jpg they should be 20 ohms, except the modulating solenoid shown at 10 ohms..
..and the TCC solenoid must be verified between pins D and A..it does not have E as the common 12v supply of the other three solenoids
Looking at dtc36 page, I just became wondering if the brake switch was verified...because it this contact is gone haywire, you loose TCC... but this is just a part of what you describe anyway.

About Paul Taylor's post, yes it was about injectors but I was borne to think the driver transistors would be the same all across the board, since they do same job....hence my allegation. I have not personally investigated into that, however.