2005 GMC Sierra Transmission Problems

The 2005 GMC Sierra was the 6th year of the GMT800 platform truck.  Now, these trucks are getting older, and it’s very likely that your 2005 Sierra may be having transmission problems.  Below, you’ll find a ton of troubleshooting your transmission problems.  The 2005 Sierra was a carryover from the 2004 model year. First and foremost, … Read more2005 GMC Sierra Transmission Problems

2004 GMC Sierra Transmission Problems

The 2004 GMC Sierra was the 6th year of the GMT800 platform truck.  Now, these trucks are getting older, and it’s very likely that your 2004 Sierra may be having transmission problems.  Below, you’ll find a ton of troubleshooting your transmission problems.  The 2004 Sierra was a carryover from the 2003 model year. First and foremost, … Read more2004 GMC Sierra Transmission Problems

2003 GMC Sierra Transmission Problems

The 2003 GMC Sierra was the 5th year of the GMT800 platform truck.  After five years, most of the issues with these trucks had been worked out.  Now, these trucks are getting older, and it’s very likely that your 2003 Sierra may be having transmission problems.  Below, you’ll find a ton of troubleshooting your transmission problems. … Read more2003 GMC Sierra Transmission Problems

Th400 vs 4L80E Differences

Clearly, the biggest difference between the TH400 vs 4L80E is the 4L80E’s overdrive gear. Although they come from different eras, there is quite a bit that these two transmissions have in common.  The mere fact that people are so interested in this topic is a testament to the absolute bulletproof reputation of the TH400.  There … Read moreTh400 vs 4L80E Differences

4L80E Transmission Problems  

The 4L80E Transmission is a fully computer controlled transmission that comes bolted to the higher horsepower and torque trucks.  It is the overdrive successor to the 3L80(better known as the TH400 for most of it’s life).  It is significantly larger than the 4L60E and if you compare the cases side by side it makes the … Read more4L80E Transmission Problems