Does this make sense? - Page 3

***cleatus12r*** · #21 Mon, May 16th, 2011, 07:54 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 · #22 Mon, May 16th, 2011, 10:39 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 · #23 Mon, May 16th, 2011, 01:39 PM

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

rammertide07 · #24 Mon, May 16th, 2011, 02:25 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 · #25 Tue, May 17th, 2011, 01:49 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.

***cleatus12r*** · #26 Tue, May 17th, 2011, 06:00 AM

No biggie. Typically we don't change the tire size stuff for anything smaller than 33" tires since there is no speedometer correction in the chip.

wood4heat · #27 Tue, May 17th, 2011, 09:27 PM

I have seen some programmers that defuel on shifts. Seems like that would save a lot of wear and tear on the drive train, is that possible with a PHP chip on our trucks?

***cleatus12r*** · #28 Wed, May 18th, 2011, 08:25 AM

The factory programming has a torque reduction strategy during the shifts. We keep this in place on the towing and daily driving tunes. The performance and race tunes do not have this feature...especially on the 02-03 trucks because of shifting concerns due to transmission hardware changes.

wood4heat · #29 Thu, May 19th, 2011, 09:22 AM

Quote:

Originally Posted by cleatus12r

The performance and race tunes do not have this feature...especially on the 02-03 trucks because of shifting concerns due to transmission hardware changes.

Whenever you have time I would love to know what you meant by this. Especially since I have an '03. Should I be concerned or pay special attention to anything?

***cleatus12r*** · #30 Thu, May 19th, 2011, 10:05 AM

Quote:

Originally Posted by wood4heat

Whenever you have time I would love to know what you meant by this. Especially since I have an '03. Should I be concerned or pay special attention to anything?

The valve body spacer on the 02 and 03 trucks is different than the one on earlier trucks so it's easy to get a long, drawn-out shift on higher horsepower programs due to restricted flow problems. Sometimes, you'll get a flare and a bump too.