Scangauge Codes?

[Gordinho80]

I'm interested in getting a Scangauge in the near future. Was wondering what Xgauge codes are out there for our platform that might be of benfit to us Off-Roaders.

[foosh]

I was actually thinking about buying one... my speedo is going anyways, so this would help. Still haven't had my pcm tuned, but would this be able to be programmed so the pcm reads the speedo right or would i still have to do the tune?

[Trail X]

The majority of gauge codes can be found here: http://scangauge.com/support/pdfs/XGAUGE.pdf

I beleive GM VPW codes apply to TBs up to '05. After '05 you are into the CAN codes. Completely different sets for the different years.

The Trans temp was the most useful to me, and the reason I purchased:

The following is VPW for transmission:
Trans Fluid Temperature (Exc Allison)
TXD: 6C10F1221940(01)
RXF: 046205190640
RXD: 3008
MTH: 00090005FFD8
NAM: TFT
Units: Degrees F

[Trail X]

I was actually thinking about buying one... my speedo is going anyways, so this would help. Still haven't had my pcm tuned, but would this be able to be programmed so the pcm reads the speedo right or would i still have to do the tune?

The Scangauge can be tuned to read the proper speed and has a built in function for it, but it cannot affect any information inside the vehicle other than clearing codes.

[The Roadie]

I bought it just for the tranny temp as well. That's a newer PDF than the one I had. At least they added O2 sensors. Still no fan support.

[foosh]

I was actually thinking about buying one... my speedo is going anyways, so this would help. Still haven't had my pcm tuned, but would this be able to be programmed so the pcm reads the speedo right or would i still have to do the tune?

The Scangauge can be tuned to read the proper speed and has a built in function for it, but it cannot affect any information inside the vehicle other than clearing codes.

Ok, thanks... then its definatley being added to my list for both vehicles! My trans am's speedo is off too due to upgraded gears.

[Zero]

The majority of gauge codes can be found here: http://scangauge.com/support/pdfs/XGAUGE.pdf

I beleive GM VPW codes apply to TBs up to '05. After '05 you are into the CAN codes. Completely different sets for the different years.

The Trans temp was the most useful to me, and the reason I purchased:

The following is VPW for transmission:
Trans Fluid Temperature (Exc Allison)
TXD: 6C10F1221940(01)
RXF: 046205190640
RXD: 3008
MTH: 00090005FFD8
NAM: TFT
Units: Degrees F

why is there a "01" in ( ) for the values for "txd"? and these codes will work for the 2005 correct? i love my new scan gauge more and more. the functions are great!

[Trail X]

You may or may not have to include the 01. Depends on the car.

[Zero]

awesome, thats what i figured. thanx bro! im gona go set this up on my scangauge asap

[Zero]

just a note, i have an 05 trailblazer ext, 4.2l (more info in my profile) and i had to use that optional "01" to get the scan gauge to give me any kind of read out on "tft".

so i went in, edited the first code to add the otional "01" at the end. saved the changes, and went back to gauge function. now it shows a numerical value that does fluctuate. in stop and go traffic it seems to be between 155- and 168.

what is a nominal temp that our trany's usualy function around?

what temp would be considered too hot?

another question, is why i didnt have the choice to have the new xgauge function displayed in C or F?

and while im here, how accurate is that horsepower function? i know it wont be perfect, but would it be a reasonable # to assume you may be producing?

[Trail X]

I didn't find the HP rating to be useful. I believe it's a purely mathematical reading based on your speed and the engine power demand.

Trans temp is in F. The X-gauges are programmed by you. The MTH code stands for math. It's the hexadecimal math code that the scangauge applies to your trans temp signal to turn it into a logical number. If you want to get it in C, you need to figure out the hexadecimal math signal. Look it up around the web, I've seen that same question asked.

Remember that your trans is warmed / cooled off of your radiator. The trans temps should eventually reach the operating temp of your engine (in hot weather), however it's cooled off of the cooler, lower, end of the radiator. If your thermostat is not at full-open, your lower radiator cap will be cooler than engine operating temp, thus your trans temp will be lower.

Our Transmission uses Dextron III.
Burn point: 260°f
Flash point: 185°c (365°f)
Fire point: 220°c (428°f)

[Zero]

so would you say a safe operating temp would be between 130-170, and start to get worried about heat around 200F?

[Trail X]

Your transmission can get to 230 before I'd start worrying. No damage is done until you hit 260.

[The Roadie]

Safe is up to 200, I find in mountain climbs. It used to go to 230-240 before an external cooler towing a trailer on hills. Before I got an external cooler, the radiator coolant temp being at 210 would heat UP the transmission fluid that flowed through the radiator-mounted heat exchanger. Not DOWN.

[Trail X]

That's the reasoning behind the radiator cooler. It's meant to heat up your transmission, as the trans fluid reaches proper viscosity at a higher temp. If you run at too cold of a temperature, it will draw out your shift times and can induce more wear on the clutch plates.

That's why even if you add a trans cooler, you should always run it in series with the radiator trans cooler.

[Zero]

isnt there a trans cooler out there that has an internal thermostate of some kind that only lets the fluid flow through it when its warmed up to prevent over cooling. i know i have heard of something like this being done somewhere before but i cant remember where....

[Trail X]

Yeah, the more expensive coolers have a viscosity controlled bypass so the cooler will only cool the hotter fluids. It's especially beneficial if you experience a wide range of temperatures.

[janesy86]

I beleive GM VPW codes apply to TBs up to '05. After '05 you are into the CAN codes. Completely different sets for the different years.

Just wanted to throw this out there since I just programed the Trans temp into my Scangauge and I had to use the GM VPW codes as well, and I have an 07'.

[Trail X]

Glad it worked for you. I know there are some differences between the 06+ and the 05-, just not sure of them all.

[bartonmd]

THe I6 engines were VPW until '08 when they switched to CAN... The V8 engines were CAN from 2006+

Mike