Hey Everyone,

First off I am glad to be apart of the community, it has help tremendously so far.

Vehicle Information:
2003 S10 Blazer 4x4
4.6 Vortec V6
4L60E Transmission

Here is what's going on:
Truck will not move unless I rev the engine to 2500-3500 RPM. And even that is a dull crawl.

Here is what has changed:
I had burned out my 3-4 clutches and did a full transmission rebuild myself (no I am not a professional however, I am a maintenance tech and have been working on cars for 20+ years) and replaced all the key components. I made sure I did not miss anything and checked multiple times before completing and installing. I know 100% the torque converter was seated correctly during install. I installed a new safety neutral switch due to damaging it when removing the glued in plugs. I also found a broken wire so I installed new connectors for both connections. All is good there I know for sure, wiring is my thing. I also have removed the top transmission cooler line and verified the pump is working. I had to replace the crank shaft position sensor due to it being bad for a while. Cleared all codes with OBD2 Scanner and now I am getting no codes.

The Problem:
I have no codes. Fluid is at the right level when hot and cold. Still have very little movement, however, I do have some movement. I have to rev the truck to 2500-3500 rpm for even the slightest movement but it will move in ALL gears.

I have been researching this for about 2 weeks now, not only on here but all over the web. My research has brought me close but not exact solutions or anything that duplicates my issue. I have even called local transmission shops and they have all said to bring it in and they will have a look, idiots do not understand it wont drive and I am just looking for some good over the phone help. No go there. Please help me! If you have seen this or know what it is please let me know. Any help is greatly appreciated.

 

Did you forget this filter or O ring on filter? Will cause low pressure problems. Was torque converter replaced at time of rebuild?
Brad

 

Torque converter was replaced now. That filter was also replaced with the correct O-ring. That cant be the problem.

 

You will need to get a pressure reading to narrow down the failure.

Brad

 

What would I need to get a pressure reading? Also, depending on the pressure what would be the fix?

 

To see is the pump is producing the proper pressure. Depends on the readings, it could be a VB issue or pump.

Brad