firechicken2k

hey, was wondering if may be some of you would be able to make a guess as to the cause of this.

the issue is that my converter doesn't lock up. at all. at any speed.

TTP was looking at it, and they are great and knowledgeable people. they looked everything over for 2 weeks and couldn't find anything wrong without disassembling the tranny.. we changed all the solenoids. and they *CAN* get it to lock up manually.. but when you drive it, it just doesn't lock up.

Understandably, they cant tell me whats wrong without taking the tranny apart. Before we do that (its a lengthy process and we need the car now as we wrecked our other one) I was just curious if any of you would make an educated guess what could cause it to do that..

its weird how it locks up manually but not otherwise.

any ideas?

2001NBMZ28

Well, since you're asking for guesses - mine doesn't lock until the ECT reaches 140, but they probably know that.

firechicken2k

since it doesnt lock up, my tranny overheats very fast.
it reaches 200, 220, 240 degrees... and still no lockup.

next guess?

DeltaT

iTrader: (5)

Check the combo switch under the brake pedal. Sometimes if the switch is bad, the tranny thinks that you are touching the brakes and will not lock.

Jim

firechicken2k

wouldn't that make me actually brake, too ?

strokedls1

iTrader: (1)

No the brakes wouldn't be on if the switch was out.

Did they check the computer signal to see whether it was trying to lock the converter up. I know my old tranny guy had a handheld unit that read all the trans functions. I would install a b&m tranny cooler in the mean time. You are gonna fry that trans if you run around with it that hot.

firechicken2k

read my mod list in my sig very carefully ...

Rock-On

iTrader: (-2)

Help me to understand...when you say manually...whats that mean??? Are they pulling the pan and plugging the tcc lock up selinoid??? Hope this helps... Dave

firechicken2k

i believe thats what they did, yes

jimmyblue

iTrader: (11)

You want to look for misfire problems, that's a prime way to
not lock in driving. I had a lot of trouble with this until I set
my misfire tables to "go away, boy!" (32000).

firechicken2k

also a very good guess, however incorrect
due to the fact that i had long tube headers installed a year ago, TTP tuned away misfires (and also installed new plugs and wires while there)

next!

b1er

iTrader: (1)

TCC solenoid.....it would set a code for that

Lock-up clutch took a dump....had that happen to me.....no codes.....and a way high tranny temp....

firechicken2k

as indicated in my first post, all solenoids were changed and are brand new
if lockup clutch took a dump, it wouldnt lock up manually. but it does (also indicated in my first post)


next

b1er

iTrader: (1)

RIF= reading is fundamental...lol....

Now for the weird question.....does your car sit outside all the time or inside?

I swapped in a pcm that was missing a screw and didnt notice it and as my car always sits inside, the only time I ever had a problem with the TCC was when I drove it in the rain and for a couple days after.....water was getting into the pcm and the only thing it screwed up was the TCC lock-up....it would stay unlocked and I could lock it with my scan tool when it was acting up....I guess it shorted the circuits for TCC control and didn't set codes or mess with anything else until I was in Orlando and it sat outside during a huge rain storm and filled the pcm with water.....

We dried it out with a hair dryer and it's still in the car working great......

Good luck man, hope you get it figured out.....

firechicken2k

heh

sounds a bit far fetched, but it does sound reasonable

i do not have a garage, so the car does sit outside whenever its in my possesion. however, it started doing this back in November. trust me, if this were the case the PCM had *many* chances to dry up, we've had a whole bunch of very warm and dry days here in jersey (very unusual for the time of the year, but hey... i am not complaining ) and the car wasn't even driven, at all, from beginning of november to middle of january

unless it got wet, only messed up the lockup, and didnt damage anything else? and the damage to the lockup control on pcm is permanent ? *that* really is far fetched, heh.. but i dunno.

thanks for the advice, keep 'em coming!!

jimmyblue

iTrader: (11)

I'd ask TTP to look at all of the misfire tables anyway;
I know I had bumped mine previously, just enough to make
the misfires quit (after the TCI converter went on I had
some low-level increase in misfires). But I picked up a lot
more of them with the Fuddle + headers install and just
went and set them all way up. Depending on the approach
TTP took, you might have only been changed to "good
enough" - which is more sensible, but maybe no longer
"good enough" with new hardware.

The other thing that can suppress lockup is a low trans
fluid temp. You might want to see what the scanner says
(that being a different electrical sender than your temp
gauge I expect). Maybe some fault there is inhibiting the
TCC lockup command. Look at TCC Mode in the scanner
and see if lock is commanded and not happening, or is
not being commanded.

firechicken2k

1st paragraph - i do not think that is possible. there is no "new hardware". all of the things in my sig have been installed at the same time (1 week apart), last year. in may. dyno tuning done at the same time. and no issues with lockup until november. so, if there were misfire issues i'd imagine they would manifest themselves way before that

2nd paragraph -thats a good idea, i do not know if they checked what the computer thinks as to the regards of fluid temp. tranny temp gauge *is* a separate sender may be the car's sender is broke. we'll check that out

TTPMatt

iTrader: (18)

firechicken: Why don't you stop by the shop this Sat. Around 11 would be great. Let's bump those misfire tables through the roof (We did increase them the last go around by 400%). Mine as well give it a try though...