Need help 4t60e

[BLADE]

Well guys here we go again i pulled into a parking lot and the car felt like it was about to die kinda a shudder if you will as i stopped. then in gear it makes some weird noises.heres the catch you know when you stop at a light on an incline the car will hold itself while its in gear this one doesnt anymore it will roll backwards kinda stumble and then stop. sounds like something is catching here and there in gear stopped. is it easier to just pull the moter and trans together would like to put a new timing chain set on and all new gaskets timing chain cover leaks alittle coolant oil pan gasket would like to do these in addition to whatever the tranny needs. Could the tranny problem be the tourque converter??? thanks for your help guys

[robertisaar]

trying to hold a car still on an incline in the method is VERY bad on it.

[BLADE]

i didnt hold it back long. no takers on this. could it be a tcc silinoid???the car still shifts fine. do i dare drive this thing further i have parked it for now.

[Azrael]

TCC only engages at highway speeds or at lower speeds when fluid temp is too high. Your symptoms could be a number of issues. Glazed input band and/or 1st gear clutches, worn valvebody components, or low fluid pressure come to mind. Check fluid level and maybe replace the vacuum modulator would be a cheap start in figuring it out.

[BLADE]

ok guys got a cherry picker today getting ready to pull it out this weekend. got the haynes auto transmission tech book for gm overhaul hope its ok . does anyone have any suggestions as far as where to get some of the special tools for the trans thanks for your help.

[pocket-rocket]

Ebay rocks for used Kent-Moore tools via closed dealerships, or ones not wanting to service our older vehicles.

[gpse3400]

Whats the engine idling at?

[BLADE]

the engine seems to idle fine i dont have a gauge so cant tell you for shure. but when its in gear drive it will make some noise not loud but like a bearing sometimes getting stuck and rolling around and then sometimes shudder at stop in drive and during the shutter it will pull the idle down. its kinda hard to explain could this be the tourque converter. should i drain the oil to look for metal shavings. how can you tell if a tourque converter is bad. i dont have alot of money it all started at the dog vet parking lot and that was 1000.00 vet bill or my dog was going to die oh well all is good now.

[Teardrop]

the 3 speed autos, the 125C, are known for TCC solenoids going bad and is not a terrible fix, but this is a 4T60 you are talking...
If you decide to dig into the transmission, be very careful in pulling the valve body apart. Lift the components by the separator plates being under each part of the valve body cause there are check balls that could fall out and making it hard to relocate them. Matching up new valve body gaskets can also be a nightmare. Sometimes they do rip when pulling things apart.

The valve body is the most difficult thing to deal with, the rest of it is not hard, just make sure to take notes of what way things install cause sometimes it is easy to reverse things. If I remember correctly, doesn't the 4T60 have two accumilators that are too easy to install upside down? Yeah I made that mistake once. Might have been a 440T4.

To check for a bad TCC SOLENOID while the trans is in the car, you might have to chase down some wires and discunnect the thing then see how the trans acts. That is easy on the 125C but not sure what it entails on the 4t60.

Honestly if it is just as much trouble one way or the other, just pull both of the engine and trans at the same time.

Also, with metal shavings, when you pull the tranny pan, there will be a magnet that will look like a chia pet, it will have a lot of metal shavings, this is acceptable as long as you don't find chunks of metal. If the fluid is pitch black, that is not a good sign, usually that is when parts inside are burnt.

For testing if the TCC itself is good, get up to highway speeds, around 60 MPH. With one foot keeping the car at 60 MPH, lightly apply pressure to the brake. If the engine revs up a couple hundred RPM, then let off the brake, still holding at 60 MPH. the RPM then should drop back down. This is assuming you are in overdrive.

Another thing - if the trans IS making a lot of noise (are you sure it is not something in the engine etc?) and acting stupid, the bad thing is transmissions typically have to be pulled out and torn down to fix. There is not too much on the outside that would take a simple adjustment to fix. Only cases is if the selector is off or if bad wiring or plugs, but that will not cause noise.

[gpse3400]

Well if you feel the engine is fighting the car at idle, as if the vehicle has a manual transmission, then I would say its a Torque Converter issue. Just for hahas, remove the vacuum line off the modulator and see if any fluid comes out of that and/ or the modulator. That is the canister on front drivers side of the transmission.

[BLADE]

no fluid out the vaccum regulator. the fluid was still red a little dirty only 15000 on this fluild very fine shavings of metal but the magnet didnt look like a chia pet either i didnt drive it very far after the first inital shudder. i am trying to pull the moter and trans together needed to do some work to the timmingf chain and new gears and need gaskets figured why not pull them together. has anyone put in a shift kit or a high nstall tourque converter if i got to change it would like to get good parts do i stick with stock tourque converter setup are these other mods worth it. I have also read the book on the valve body and kinda know the location of the check balls i felt ok with that and if the TCC silionoid is bad would it get stuck on and bog the moter down as well if it was keeping the converter in lockup condition and on the same note with the TCC silionoid hadnt noticed a problem at high speeds either with the function of the TCC silinoid. would like to change things to make it reliable or try to thanks for your opinions on some of these modifications.

[gpse3400]

Honestly I don't think the TCC soleniod is effective in lower gears, if the soleniod activates if you are in 1st or 2nd it wont apply the TCC. I'm thinking you have another issue, such as a bad ignition module. Like I said if the engine is not laboring against the car when it stalls, its not the torque converter. A shift correction kit from Trans Go is not a bad investment. Just make sure your work area is clean otherwise if you get just enough dirt in the vlave body, you clog up the soleniod filters.

[robertisaar]

i bet if the TCC solenoid was powered, regardless of gear, it would engage... wether it's a good idea is something else.

i think this due to some of the late OBD1 and early OBD2 having code that will engage the TCC in 2nd when the coolant temp is too high.

[BLADE]

one thing thats was for shure was the noise it made almost steady noise only when in gear stopped at a idle. Noise and shudder and all bad conditions gone when car is shifted to park and car at idle. this is why i figured it was the tranny it only does this in gear stopped at an idle

[pocket-rocket]

i bet if the TCC solenoid was powered, regardless of gear, it would engage... wether it's a good idea is something else.

i think this due to some of the late OBD1 and early OBD2 having code that will engage the TCC in 2nd when the coolant temp is too high.

I believe the older units, if in gear and coming to a stop would kill the engine. Basically it would be acting like coming to a stop in a manual in gear without pressing in the clutch.