Monthly Archives: January 2008

Cold Automatic Transmission Issues

Based on my experience, I would say that close to 40%, maybe more, of temperature related transmission issues are due to torque converter drain back, and loose valve body bolts (meaning not properly torqued to spec.).  Torque converter drain back is commonly due to a poor trans pick-up filter.  But also can be caused by loose valve body bolts (not just the main bolts, but the bolts that retain the two halves as well).  Loose valve body bolts not only allow drain-back of trans fluid, but also allows torsional twist, binding and deformation of the valve body which can cause sticking or binding valves – especially when cold.  However, after the vehicle is warmed up, the fluid fills up the torque converter and trans and operates normally.  Continue reading

Do Car Companies Really Care About Me?

The above title is a question that customers ask themselves all the time, “Do car companies really care about me?”  The simple answer is Yes!  But a better question is – Do they hear you, known as the “customer’s voice?”  Let’s first look at several ways that customers talk to manufacturers in “Manufacturer Talk” so-to-speak… Continue reading

NHTSA Top 5 Complaint Analysis

NHTSA (National Highway Transportation Safety Administration) receives complaints when a dealer or manufacturer resolution for their vehicle has not been reached.  In the past, vehicle improvements have been based on production and warranty data, and not a huge focus on the “Customer Voice.”  Why would a manufacturer not want to hear the customer voice? 

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Voltage Loss or Voltage Drop, That Is The Question?

We hear the terms “Voltage Loss” and “Voltage Drop” test frequently in the Automotive industry.  But most refer to it as what’s is really a Voltage “Drop” test.  This is incorrect, these are two separate test with two separate purposes – however, many-times the same failure result can be determined with both test.  So what is the difference between the two test, and why do we perform them?

Well, it’s actually what it states: Continue reading

That Amazing Planetary Gear Set!

How many people really understand a Planetary Gear set, how it works, it’s use, and versatility in the market place?  The planetary gear set is one of the most amazing inventions used in our industrial society!  It’s use is all around us and we don’t even realize it.  Without it, we wouldn’t have all the luxuries and manufacturing processes that we have today…

Well, what is the darn thing?

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Powdered Metal Use In Automatic Transmissions

OK Transmission Techies, remember the old days when you disassembled a clutch pack or planetary gear set and sliced up your hands on a clutch pack housing, disc, or planetary carrier assembly?  Many of these components were stamped, cast or machined steel and commonly lacked the deburing and finishing processes needed in order to reduce process costs.  Well those days are diminishing…  Why? Continue reading