I was just wanting to check with the experts and see if I have a issue.

Towed 3 axle trailer loaded with a 73 VW bug, two implement bars, plows and a small boat. I would guess total weight at 7,000 max. The ambient temp 97 degrees and very humid. I have a 2000 dually.

The following are from the ScangaugeII
TFT trans temp 175 max
EOT end oil temp 205 max
SLP trans slip 0.20 max and 0.0 in high gear

From glow shift
Water temp 196

The one I am worried about is the trans slip, from a stop taking off always went high 0.15 to 0.20 and then drop quickly. Once the TC locked 0.0 down the road

Also, when I reverse with no load on dirt I have seen 0.20 on the trans slip

I have Forscan but have not logged any temps yet

 

That to me sounds like "static" from the way slip is calculated. I've heard anything below 10(?) is okay? Someone should be along to correct me if I'm wrong. The rest of the gauges are right in line with mine if not lower!

 

The torque converter slip gauge isn't percent, it's RPM. The way the truck knows the slip; it takes an RPM reading of the engine and the Turbine Speed Sensor. It can't read both sensors simultaneously, it has to read them one after the other - and this takes a tiny bit of time. Any fluctuation in the RPM while the PCM is taking time to turn its head from one sensor to the other will show as a "false slip". With false slip in mind, and a reading of 0.2 RPM max slip (that sounds way to low) I think you can see where this is not a concern.

I can tell you how I calibrated my TC Slip gauge: If I'm idling in gear at a stop light, there is no possible reading other than full RPM slip. If I'm idling at 750 RPM, then I had better see 750 RPM slip. Any deviation from that reading means my gauge formula needs an adjustment, or something is really screwy with a sensor in the truck.

 

Thanks, I think the TC is ok since there is no slip once locked, but at low gear with low rpms the butt o meter does not like. Very sluggish and needs throttle to get going. Maybe this is how it is designed. Will connect the Forscan and check out, I would also think if the slip was bad the overdrive light would flash.

I might order a upgraded TC from R & R, the only thing I don't like is he does not keep the drain plug.

 

TCS - What Tugly Said is accurate.

On the Water Temp - You can not effectively determine water temperature on an automatic transmission equipped truck via the PCM as it does not route through the PCM. You will need a external sensor and gauge.

You numbers otherwise look good.

For reference:


Maximums for Towing Heavy:

230*F Oil Temperature
220*F Water Temperature (measured at the water pump housing)
230 *F TFT - Its all about RPM's and not Lugging it.
200*F Power Steering / Hydro-Boost (relocating the cooler often lowers the temperature considerably. Addition of a particulate filter reduces particulate and extends pump life.

 

The coolant temp is from a gauge, went with glow shifts. So far so good, only complaint is they don't dim enough at night. Need to make so tinted covers, since glow shift does not make them. My temp prob is in the block

 

Glowshift do make tinted lenses? I have them on all my GS gauges.

 

Are the tinted lenses remove able ?

I talked to them and they said no