4L60e issues after rebuild

[NickTransmissions]

I am not familiarized with the wet pressure test procedure.

4L60E / 700R4 Forward Drum Inspection; 3rd Gear Slipping and Failure

 

[Tataocb]

4L60E / 700R4 Forward Drum Inspection; 3rd Gear Slipping and Failure

I did perform that test and there were no bubbles.

I am now testing it after having rebuilt both input and reverse drums as well as the pump. I stacked both drums along with the pump, flipped the whole assembly over and did an air. Checked through the pump holes, and I can still feel air coming out of the tip of the input shaft.

I also tested 2 other similar assemblies out of 2 other transmissions, and they all seem to blow a little bit of air out of the tip of the input shaft. So I am starting to wonder if it is normal and I just had never noticed it before?

 

[NickTransmissions]

I did perform that test and there were no bubbles.

I am now testing it after having rebuilt both input and reverse drums as well as the pump. I stacked both drums along with the pump, flipped the whole assembly over and did an air. Checked through the pump holes, and I can still feel air coming out of the tip of the input shaft.

I also tested 2 other similar assemblies out of 2 other transmissions, and they all seem to blow a little bit of air out of the tip of the input shaft. So I am starting to wonder if it is normal and I just had never noticed it before?

I've never noticed it either but will let you know tomorrow if i can hear/feel some air coming out of the snout when i take apart the 700R4 and wet pressure test the input drum.

 

[Tataocb]

I've never noticed it either but will let you know tomorrow if i can hear/feel some air coming out of the snout when i take apart the 700R4 and wet pressure test the input drum.

I decided I would continue with the reassembly since the other 2 drum and pump assemblies had similar results. When I got to the point where I air checked using the test plate there was a bit of air coming through the tip of the input shaft but nowhere near as much as it was before. So I assume the new sealing rings corrected that behavior.

 

[NickTransmissions]

I decided I would continue with the reassembly since the other 2 drum and pump assemblies had similar results. When I got to the point where I air checked using the test plate there was a bit of air coming through the tip of the input shaft but nowhere near as much as it was before. So I assume the new sealing rings corrected that behavior.

You'll know for sure once it's back in the vehicle...no news is good news in our biz...

 

[NickTransmissions]

I decided I would continue with the reassembly since the other 2 drum and pump assemblies had similar results. When I got to the point where I air checked using the test plate there was a bit of air coming through the tip of the input shaft but nowhere near as much as it was before. So I assume the new sealing rings corrected that behavior.

I did a wet pressure test and air check of a 700R4 drum today (this one had the tcc ball capsule in the snout removed) and there was absolutely no air coming out of the snout of the input shaft. I also checked a 4L60E drum that I threw together with what I had laying around in the shop and air-checked it as well...No air coming out of the snout.