Recent content by Skyhawk13205

I have been trying to find a simple way to determine if the transfer case locks. The only ways I can figure is to: 1: get it stuck and see if front and rear spin at the same rate. 2: check the c7 clutch pressure vs main. 3: check for binding on turns on a hard surface. The safest and least...

Eco Hubs tear down report. Driven about 3k miles, most highway, some snow and off highway/road conditions, several times had TQ stalled in 1st gear while towing another 1078 that got stuck in a ditch. Driving duration of 2 years. Repacking rear axle bearings, found splines to be in good...

I usually try to shift when driving straight on a low traction surface. I have a couple of situation where I shift on the fly, such as making a hard turn then driving up a steep hill. I think the weak point of the drivetrain would be the splines in the differential, front axle u joints or the c7...

I got the tool about 2 years ago, if you want to make one I have some measurements.

I took the head off my parts truck and rebuilt that then swapped with my operational truck and I just finished replacing all the valves on that as well so I have a spare. I found all the intake valve disks damaged even tho the springs were still intact, the disks have gouge marks from slamming...

It is funny, I parked next to a river and I had the same thought, imaging the parking brake releaseing and me rolling into the river in the night. My anxiety got so bad I dug out the chocks in the middle of the night.

My PTO has a slight leak on the transmission mounting, it leaks on the side and weeps out.

If you want to big deal it you can have Cat do the blow by test with a special meter that is attached to the breather to get a specific CFM for acceptable blow by.

I used sensor common, there is some difference of opinion that sensor common is not the same as gnd, but it seems to work for most people. I also had to wire in a relay tied to service brake to give the ecm signal the brake is applied to shut off the cruise control.

Good job, glad you got it sorted. I am sure everyone else with the 3126 is looking forward to this project in the future.

I am guessing when you pull the sensor the ECM just assumes the pressure based on engine RPM and spool valve current. It must use a trend line or a table to estimate the values. Glad you are making progress.

The troubleshooting steps are not much help

Does the value change on ET? My experience with bad sensors is a hard failure, were the sensor produces no computed data usually outside of range or unreasonable data range, intermittent failure give correct/incorrect reasonable values and unreasonable data range. Then the unannunicated failure...

The system description says at least 870 psi, my guess is that starting is inhibited until that limit is reached.

I think each clutch should have a pressure switch, if they are pressurized you should have a code, can you check if you have any transmission codes. a youtuber had a truck that the tranmission was seized and it ended up just getting really hot, another guy on Facebook had a tranmission that he...