April 2018 Issue
In This Issue
Toyota U151E: Harsh up and down shifts
Hyundai A4CF2: Cap seal location
Honda/Acura: Light throttle shudder
Acura MDX: No reverse after rebuild
Super Sleuth
This vehicle was recently dropped at my door with the daunting “intermittent” concern. Power windows, radio and wipers would work for periods of time – sometimes for full days – and then fail, only to resume for no apparent reason.
Sonnax presents a vacuum test diagram for GM 6T30 and Gen. 2 6T40, 6T45, 6T50.
Sonnax presents a vacuum test dia-gram for GM 6T30 and Gen. 2 6T40, 6T45, 6T50.
Beware of Code P0720: Part 2
When the computer observed an increase in rear prop speed as a result of the axle popping out, it determined the front vehicle speed sensor as being faulty due to it decreasing in rpm. Of course the loss of rpm was due to the loss of power. The computer either didn’t or couldn’t distinguish the difference. Nonetheless, the front vehicle speed sensor was being blamed when nothing was wrong with it or the transmission. Considering the strain this had on the transfer clutch with the axle popping in and out, it explains why they were burnt originally.
Just When I Thought I’ve Seen Everything
OK, let me see if I’ve got this right. The Mercedes 7G-DCT 7-speed dual clutch transmission does not have a reverse idler gear. When shifted to reverse it uses 2nd gear, 3rd gear and 1st along with all four shafts. That’s correct, now let me explain how and why.
An Expanding Presence
Transmission Digest recently visited the BorgWarner Powertrain Distribution Center in Melrose Park, Ill. A lot has changed since the last visit in 2015 including the new location. The new distribution center is near major transportation hubs including airports and interstates making it cost effective and convenient to bring in BorgWarner products from around the world. The Powertrain Distribution Center manages a supply of components from more than 10 BorgWarner facilities around the world and ships product to more than 100 customers in 17 countries.
Toyota’s K313: Examining hydraulic system
We left off last month having already pulled the valve body from this little Toyota CVT unit. Once the valve body is removed, the 2-wire Hall-Effect turbine-shaft speed sensor (NT) can be seen bolted to the case where it reads the rotation of the forward clutch drum assembly.
American Transmission, Jacksonville, Fla.
While the company is invested in systems and sales on a large scale, the managers preach customers service for all patrons, near and far, individual and commercial.
Debris, Melted Insulation Cause Two Codes to Set
About two months ago a customer brought in his 2006 Ford E350 Econoline van equipped with a 5.4L engine and a 4R75E transmission for an evaluation. His concern was that the check-engine light was on and the transmission seemed to shift hard at times. We always begin our evaluation with a battery and charging system test with a Midtronics electrical system analyzer, and we scan all modules for codes using a Snap-on Verus Pro if we are not using an OE scan tool. After a quick visual inspection of the vehicle and checking the engine oil level, we will proceed with the road-test.
The Tale of Cha Cha: A Pint-Sized Relationship Lesson
Sometimes when you meet someone, you have no idea the lasting impact they’ll have on your life. They might annoy or burden you or seem like someone just whizzing by in the periphery. And sometimes, even when the start isn’t great, it’s the beginning of a relationship you just can’t shake.
The Price is Right – Or Is It?
We may once have figured out exactly what everything costs us and worked out the appropriate markup to allow us to make a profit, but how long ago was that? What has changed since then and how far behind are we? If you were once profitable on a certain amount of volume, and although the volume hasn’t changed, the profit is dwindling lower and lower: It’s obvious the fault is with your pricing.
