Does this make sense?

***cleatus12r*** · #1 Fri, May 6th, 2011, 08:57 AM

wood4heat, what is your PCM code? Longshot270 had some really great information there, but as far as the 4R100 is concerned it is a little off....

Under normal acceleration, the TCC is commanded to apply in 3rd gear at some point (Depending on PCM code, which is why I asked for it).

If you can truly FEEL the 1-2 and 2-3 upshifts under normal acceleration, it's likely you have something done to the transmission. Typically, with stock programming and a stock transmission, the 1-2 and 2-3 upshifts SLIDE into gear and you really don't notice much of an RPM change.

wood4heat · #2 Sun, May 15th, 2011, 07:55 PM

Quote:

Originally Posted by cleatus12r

wood4heat, what is your PCM code? Longshot270 had some really great information there, but as far as the 4R100 is concerned it is a little off....

Under normal acceleration, the TCC is commanded to apply in 3rd gear at some point (Depending on PCM code, which is why I asked for it).

Just took a look, my code is VDH5. Does that tell you anything?

I would also still like to know if the 3-4 shift can be cleaned up without changing the 1-2 and 2-3 shifts.

Would it be best just to call in before filling out the order form?

cj45lc · #3 Sun, May 15th, 2011, 11:34 PM

I'd give them a call just to make sure you get all your questions answered. That was one of the things that really impressed me, no matter how dumb or trivial the questions I asked I got great answers without being made to feel like a dumba$$...lol. They are really a great outfit to deal with.

***cleatus12r*** · #4 Mon, May 16th, 2011, 08:54 AM

VDH5.

You should have a 1st, 2nd, 3rd, TCC apply, 4th gear pattern. The torque converter clutch will release momentarily during a 4-3 downshift and there will be a 2nd gear TCC apply if you stand on the accelerator above 16 MPH.

Sounds to me like you're feeling the torque converter clutch apply as the "undetectable" shift. The 3-4 upshift will drop a lot of RPM....that's normal. If the 1-2, 2-3, and 3-4 shifts are firm, then I would say that the transmission has been violated.

Sounds like you have an aftermarket valve body in the transmission and a stock torque converter.

rammertide07 · #5 Mon, May 16th, 2011, 11:39 AM

Never had problem with the pcm casing causing randon shutoff. What I did was put cord holders along the side of the PCM casing to "snake" the cable through. That keeps tension on the cable and holds it in place.

Only problem I have found is the little solder joints on the end of the chip. Slight vibrations and and removing/installing the chip have caused the sharp solder joints to scratch some of the PCM circuits that lead off where the chip slides on. For this, I put some liquid tape over those solder joints so they are not so pointy.

wood4heat · #6 Mon, May 16th, 2011, 02:39 PM

Why couldn't you just cut out the back of the box where it interferes with the chip?

rammertide07 · #7 Mon, May 16th, 2011, 03:25 PM

I'm not sure what the other guys are talking about with the PCM casing interferring with the wire. I cut the casing out where I could slide the chip in/out without having to disconnect everything.

wood4heat · #8 Tue, May 17th, 2011, 02:49 AM

Thanks to everybody for all the help and advice. I called Cody this morning and he answered all my questions so I just placed my order!

I ordered:

1-Stock,
2-40hp tow,
3-65hp tow,
4-80hp DD,
5-120hp race, and
6-whisper mode.

I did make a mistake though, I entered my axle ratio (3.73) and modified tire size (285/75/16) but somehow deleted my stock tire size (265/75/16).

Cody, if you read this today could you add that info to my order?

Sorry for the mistake and thanks again for all your help.