GM Transmission Pump Alignment Tool

Most of the longitudinal GM Automatic Transmissions have similar sized pumps.  This makes it nice, because one pump  One GM Pump alignment band is compatible with most GM Automatic Transmissions. A pump alignment tool is simple tool, much like a ring compressor, that makes it possible to align the pump body to the pump body. … Read more

NV3500 Specs + Identification

The purpose of this page is to help you find all the info regarding the NV3500 transmission’s specs and identification in one place.  Within the confines of General Motors transmissions, the NV3500 is known as the M50 transmission.  If you made your way here because you were trying to figure out what this code meant, … Read more

Best TH400/TH350 Shifter

While the TH400 and TH350 transmissions may not be in production anymore, but they both still enjoy quite a life in the performance and racing communities.  The shifters that came with these transmissions do not lend themselves well to precise shifting mechanics.  In breaking down which shifter is best, we approached it from the perspectives of … Read more

4L60E Problems: No 3rd or 4th Gear

One of the most common (and most frustrating) problems that happens to the 4L60E is when it loses 3rd and 4th gear at the same time.  This leaves you driving around a car or truck that screams down the road.  So, what causes the no 3rd gear or 4th gear problem?  Below are some common … Read more

4L60 vs 4L60E: Comparing the Differences

GM changed the name of the 700R4 in the middle of its production cycle.  The new name was 4L60.  After a few years the 700R4/4L60 became the 4L60E around 1992.  This is cost a total of confusion with people looking to buy the right transmission. Now in the aftermarket world, the 700R4 is almost always … Read more

Are all 4L60E transmissions the same?

Are all 4L60E transmissions the same

  The 4L60E transmission was found behind the majority of GM rear wheel drive vehicles for the almost 20 years.  Are 4L60E transmissions the same?  No they are not.  More importantly, not all 4L60E transmission are compatible with one another.  We’ll go over some of the bigger differences in order to help you better understand … Read more

4l60e to 4l80e swap kit

  Swapping from the 4L60E to the 4L80E is not difficult to do in vehicles that were equipped with both transmissions.  Here are the main parts that you are going to need in order to make your own 4L60E to 4L80E swap kit.  It’s not the easiest swap to do, and a 4L60E can handle a … Read more

Best Performance and Racing 4L60E (For Any Budget)

Even from the factory, the 4L60E can handle some serious horsepower.  The newer the model, the better off it’s going to do with no modification.  A common myth that people believe is that to handle some serious horsepower you need a 4L80E.  This is not the case.  A well-built 4L60E can handle over a thousand … Read more