Armyman2445

iTrader: (17)

Ive heard about this but Im not quite sure exactly what it is. what exactly does it do?

siniSSter

iTrader: (2)

Yup, anything usually 2800 and up have problems shifting... For some reason the PCM has trouble shifting the 4L60E. On a friends car we intalled a 3500 and it would shift at all...you would have to let go of the throttle a little...after a reprogram and some tires...it shot a 13.00 with a full set of bolt-ons and a full exhaust.

Armyman2445

iTrader: (17)

makes sense b/c im using a 3600 and it bounces off the rev limiter in every gear at WOT.

BlackScreaminMachine

iTrader: (17)

What he is refering to is stall wall, what it does is the pcm goes into a "safe" mode, puts the car into 3rd gear, make it feels like a trying to leave the line in 3rd gear. You have to shut the car down and restart. PCMforless programmed it out when I got my 2800 stall, With the 383 it would flash past that.

mean_greenz28

hmm....this is interesting....ive had a TCI 3500 in my car for a year and a half and i thought everyone was crazy because i had never heard of this before. A couple of weeks ago when i went to the track, it started bouncing off the rev limiter between shifts a couple of times before it would shift. I thought the tranny was just taking a crap on me, and was going to look at the servo assembly (had similar problems with it not shifting after a rebuild and a seal was cut) but now im wondering if it could be hitting the "stall wall" has anyone ever heard of this happening after a year or more of it not doing it?

BlackScreaminMachine

iTrader: (17)

your tranny is probably smoked, it its having a issue shifting from 1-2, hitting the limiter, have it check its probably a selinoid. Your probably not making enough power to flash the converter over the magic #.

I had a pro torque 2000 stall in the 383 and never hit it, I got the 2800 and it happend all the time. The car acts like your in a 3rd gear in a manual car, has to wind up real high before it moves. Frankly it scared the **** out of me.

buffman

iTrader: (9)

I've got a 3000 that stalls to around 3400 off the line and I dont have a problem at all. Due to my ignorance of how I was supposed to set my suspension up, I guess I'll see this next year if the 60' times drop if I have the problem. IIRC I think a few people say it has to do with the output shaft flexing and something with the VSS.

I originally had bryan tune it just incase of "stall wall" but my trans would act goofy, and would shift out of 1st gear early, unless you manually shifted the car. Im sure it was something bryan forgot to do or something (as he always seems in a hurry) so without knowing what to change, I just had him remove it (you'll looose 2-1 downshifting if you have it) and havent had a problem since.

I believe my friend runs a 3500 ish stall in his low 12 (ran a 11 the other day) sec caprice, with no problems either..

BlackScreaminMachine

iTrader: (17)

If its ODB2, there will be no issue, Bryan sometimes just includes the stall wall fix, so who knows.

Camaroholic

iTrader: (1)

It usually happened to me during burnouts (Yank ST3500 with my h/c motor). My PCM would lose the VSS signal - on the datalog, the VSS reading would 'freeze' at 3 mph, suddenly jump to 140 mph, and then jump around some and start reading right as the burnout ended. By this time, the trans had gone in to limp home mode, so a 'launch' resulted in a soft shift to third gear (and an 18 second quarter mile timeslip). There was absolutely nothing wrong with my trans - I put an OBD2 computer in the car and it was fine. Later, I put the stock converter back in and had no problem. I recently had Yank rebuild my ST3500, turn it in to a SY3000. I like it much better, it feels a lot better driving around town so far. I have yet to get it to the track though. That ST3500 was just too loose for my tastes.

streetwarrior96

OBDII

thelostartof

.. so what if your trans runs a kickdown cable vs being electronic and you are hitting the limiter on w0t shifts?. what is needed to bypass it? more revs? i'm hitting my 6250 limiter on a 3k stall and built trans

Geoff

iTrader: (3)

There is supposed to be a fix for the OBD 1 computers. I just need to get a car in here to try it out on.

Armyman2445

iTrader: (17)

thats what mine does. IN the water box if i burn out past 3500 rpm it takes it forever for the car to get moving again. If i shut the car off for about 5 mins its fine again. And if i keep rpms low in the water box(takes for ever to heat up the tires) and make a run it takes me forever to get going again after I make a run. So i hitting the stall wall, I just thought my stall was completely trashed.

Michigan Skip

The "limp home" mode, where the trans shfts into 3rd and won't clear until you shut the car off, has a fix with TunerCat for OBD1.

Tools
ECM Constants Table
VSS Diagnostic enable min rpm
Change from the default 3000 rpm to over what your stall is.

That should keep you from going into "limp home" mode where the trans shifts from 1st into 3rd.

1SlowFormula

John,

Do you have any tuning software? I can hook you up with the fix next time I see you or whatever, I got it from pcmforless when i got the 3500 vig and it hit the stall wall...

BlackScreaminMachine

iTrader: (17)

I just checked my file and its at 3000 rpms, worked mint when the car was running. One minor correction its under tables, not tools but no biggie, it was like 3/4 down the list.

Armyman2445

iTrader: (17)

Yea I got TunerCats, I've been trying to learn what everything is.

buffman

iTrader: (9)

LOl I forgot his was a 96...

Anyways not to be offensive to bryan as he does great tuning, but he gets too much of a hurry and forgets things a lot of times. He usually does what needs to be done and is done with it.

Bryan does editing to the actual hard code or something for the stall fix. I checked my tune and it's set at 3000. I just upped it to 3500 just incase