AW55-50: No Reverse; 09G/09K/09M: No Movement
I recently received a phone call from a shop that was working on a 2001 Volvo with an AW 55-50 transmission. The vehicle would not move when shifted from Park to Reverse. If the selector was first put into Drive then moved to Reverse, engagement was normal. The manual linkage was checked, confirming that the manual valve was in the reverse position.
The Magna Powertrain MP3023/3024 NQH
In last month’s article we discussed two of the three new models of transfer cases from Magna Powertrain, the MP1222/1225/1226 NQG and the MP1625/1626 NQF. This month we will discuss the operation and mechanical functions unique to the MP3023/3024 NQH. Figure 1 breaks down the identification code for the MP3023. These are active transfer cases (ATC) with sophisticated advanced electronics.
April 2010 Issue
In This Issue
5L40-E/A5S 390R: Accumulator specifications and identification
Back to the Basics: Strategy-Based Diagnosis
Later that day they showed up to drop off the car, a 2002 Volkswagen Jetta GLS with 72,000 miles (Figure 1). The owner of the car started to explain the concern he was having: “Everything was working great, then one day the check engine light came on and it started to shift real hard and fast. I took it to (shop A) and they said it was either the transmission control module or the transmission. If it was the module, it was going to be $2,000; if it was the transmission, $5,000 plus reprogramming and any wire repairs; or it could need both. I paid them $145 for looking at it, but I wanted to get a little more specific about what it was going to cost, so I took it to (shop B); they had it for a week and said they thought it needed a control module but were not real sure and asked me to take it somewhere else, so here I am.”
Car Gets New Life After Revamped DME System
The car sitting in front of my bay was towed in last night for a no-start problem. Looking at it gives me that “Here-I-go-again” feeling. The chalky paint is oxidized from infrared overexposure. A greenish hue of lichens blankets the exposed upper surfaces. The tags have been expired for two years. Disturbed ants crawl along the inner fender seam, originating from a bra that covers the front of the vehicle. There are no leaves or maple seeds in the cowl vents, so I assume it might have been residing in an apartment complex (covered parking) or perhaps a subdivision.
March 2010 Issue
In This Issue
Ford 4R70W /4R70E/4R75E, 2003-Up: No speedometer reading, or reading slow
5R55W/S: 2003 & Later Ford/Lincoln: No plug for ATF refill
41TE/42LE: 1996 & Later Dodge/Chrysler Vehicles: PRND3L lights malfunction
4T60-E/4T65-E: Torque-converter clutch stuck off
Issue Summary:
After overhaul or transmission exchange, Ford Motor Co. vehicles equipped with the 4R70W/4R70E/4R75E transmission may exhibit either no speedometer reading or a slow speedometer read-ing (below).
A Ford/Lincoln vehicle equipped with the 5R55W/S transmission may have no fill plug (page 3).
In 1996 and later Dodge/Chrysler vehicles with 41TE/42LE transmissions, a malfunctioning ignition switch may cause all the PRND3L lights to be illumi-nated in Park and Neutral (page 4).
Installation of a 4T60-E stator-support shaft in a 4T65-E will prevent TCC application (page 7).
01J CVT: Diagnosing and Repairing Code 17090
A 2003 Audi A4 with an 01J continuously variable transmission (CVT) came to our shop. The customer complained that the vehicle was sluggish in forward and had no reverse and that this would take place only when all the lights in the gear indicator “lighted up and flashed.”
A Fly on the Wall
When transmission parts fail or have problems, I often think about the decisions made along the way that resulted in the problematic part being used in production. A common sight at many transmission benches these days is a “cracked” separator plate found in 2001 and newer 4R70W/4R75E units. There is more to this story than just the cracked plates discovered during the rebuild, and it started long ago when the decision was made to eliminate a valve-body stiffener plate. I would love to have been a fly on the wall back then, listening to the reasons why it was OK to eliminate the stiffener plate.
GM’s 2ML70 Hybrid Two-Mode Transmission – Part 2
As promised, we are back to take a look at the inside of this 2ML70 hybrid two-mode RWD transmission. When you look at the front of this transmission it almost appears to be receiving input torque from the gas engine through a conventional torque converter (Figure 1), but that is not the case. Power from the engine is delivered through a torque-damper assembly that is bolted to the crank and splines to the input shaft and pump. The reason for the front seal is that cooler return oil is supplied to the assembly through the pump to keep its damping parts lubricated.
Serviceability Report: Volvo S40
In the summer of 1995, the first S40 was built in a Dutch factory that originally produced the DAF (Van Doorne’s Aanhangwagen Fabriek). This was a joint venture among the Dutch government, Volvo and Mitsubishi. In 1999, Ford Motor Co. – the world’s most-profitable carmaker at that time – bought the automobile operations of Swedish-based Volvo for $6.45 billion. This is a figure slightly less than Ford’s 1998 profits of $6.57 billion. As of this writing, Volvo is for sale and may end up in the hands of the Chinese automotive company Geely – so Ford can get back to basics.
The Latest Models of Transfer Cases from Magna Powertrain
In the ever-changing world of automotive technology, we must keep up with an endless supply of new car models and their components. We will look at a new family of transfer cases manufactured by Magna Powertrain.
Don’t Forget the Basics
Instead of choosing just one success story that applies to one vehicle, how about writing something that applies to all vehicles? The thought that I want to convey is to pay attention to the simple things and small details alike, both when diagnosing a problem and when removing and reinstalling a transmission.
