tcc issue or torque converter or ????

[wymjym]

I'm starting to have heated discussions with a local tranny shop that rebuilt my ax4n transmission.
They delivered it with some serious drivability issues. Returned it with less. I drove it @ 50 miles and determined that the tc locked up or not but did not modulate (smooth transions between locked and not locked). I returned it and they took the tranny out, told me that they found a faulty tcc solenoid (which they had 'replaced' with the initial rebuild), replaced the inner harness and put it back together. It now shifts better but the tc lockup is still an issue. I suggested that possibly they installed the incorrect tcc solenoid. The mechanic insists that it is the correct one for the tranny (which it might be) but since the car is an early 97 model, the tranny was original to the car, the pcm had never been flashed I was dumbfounded when he told me that it speced out fine at between 13~24 ohms. I have no 1st hand experience with these things but my reading indicated that the early tcc solenoid should be .9~1.5 ohms (96~mid 97) and that should be the one in that transmission.
It is getting to the point where I'm either going to need some definitive proof that the tranny should have the .9~1.5 ohm tcc solenoid or pick the car up and pay someone else to repair it again.
Any help would be appreciated.
wj

 

[Mr Anonymous]

If the wrong TCC solenoid is installed, you will not get any lockup at all because the feedback will be way off and the PCM will leave the TCC unlocked and flip a light. A rebuilt TC is going to have more lockup feel to it than an old one.

 

[wymjym]

but this isn't just noticable, it jumps in and out of lockup, especially betwen 30~40 mph. There is absolutely NO slippage, that is the engine speed does not rise or fall a few hundred rpms and then lock...it goes bang.
any other thoughts? incorrect tq?
wj

 

[bacernate]

I would have to believe that there's something wrong in the valve body. I've had quite a few runarounds with trans builders over the years, ie. we put a new part in then they back out and say it was rebuilt and horsehocky like that.
It's very hard to find a reputable trans shop any more. We tend to only use Jasper units at work or oem rebuilds. The price is competitive and most have a 50 to 100k warranty. Most local trans shops have a 12 month 12k warranty.
Sorry I Haven't emailed you back yet been on vacation and having tc issues myself on my 97.
Is there anyway to email me the mode 6 page off your scanner. The datalogging is very hard to read. I would have to say if your going in and out of closed loop you've probably got an o2 sensor going bad. Have you ever replaced the front o2 sensors?
Also if you have a drivability issue it can effect trans operation.
I'm fighting a lack of lockup above 65mph.
Also I'm losing alot of power when the car is hot unless i mash the throttle and then all is ok. So I'm thinking my tc is taking a dump.

 

[SHO#7]

There are two types of lock up solenoids. They ohm in two very different ranges. I dont remember, what one is what. But there are two.

However, I belive the outcome would be a P1740 TCC Malfunction, or stuck off.

If you get stuck, PM me some details and I will look into it on Monday.

Mike

 

[wymjym]

There are two types of lock up solenoids. They ohm in two very different ranges. I dont remember, what one is what. But there are two.

However, I belive the outcome would be a P1740 TCC Malfunction, or stuck off.

If you get stuck, PM me some details and I will look into it on Monday.

Mike

Hi Mike,
After three months without the car they finally got it right.
Although they eventually replaced the tc, valve body, all solenoids: TWO TIMES!! I believe that the problem from the get go was the incorrect tcc solenoid.
I offered that suggestion right off, supplied them with a print out of the tsb with associated part numbers/tranny # associations............that went to deaf ears.
They finally admitted that they had installed an incorrect tcc solenoid two times.
My tranny did not have any modulation when the lockup/lockout occurred, never. There was NEVER...a code thrown yet the incorrect tcc solenoid had been installed.
I picked the car up Friday and it is now just fine.
thank you everyone that offered help.
wj

 

[Silvapain]

There are two types of lock up solenoids. They ohm in two very different ranges. I dont remember, what one is what. But there are two.

However, I belive the outcome would be a P1740 TCC Malfunction, or stuck off.

If you get stuck, PM me some details and I will look into it on Monday.

Mike

96-97 is the low-Ohm TCC solenoid
98-99 is the high-Ohm TCC solenoid

 

[wymjym]

96-97 is the low-Ohm TCC solenoid
98-99 is the high-Ohm TCC solenoid

that is right, but sometimes people mess up

I don't know if this is true but the mechanic said that their Michels Manual had a missprint...sounds pretty convenient to me especially since I had stressed the different ohm values in every conversation I had with them. Live and learn.
wj