AWD Archives - Transmission Digest
Honda CR-V Light Throttle Vibration

Complaint: A 2012 to 2014 Honda CR-V may have complaints of a surge, shudder or vibration while driving under light throttle. Cause Software part number 37820-R5A-305 is faulty. Correction: Update automatic transmission software and change the transmission fluid using DW-1 fluid. Fluid capacities are 2.2 Liters (2.3 Qts.) for the 2 Wheel Drive models and

TF81 AWD Differential Splines

You can now purchase the hardened splines to repair your TF81 differential.

Transmission Tech: ZF/Chrysler 8 Speed AWD – Part 2

Mike Riley continues his discussion of the ZF/Chrysler 8-speed at Trans Colonial Auto Service.

TDTG 061520
Transmission Tech: Toyota AWD Differential Bearing Noise

In this episode, Mike Riley discusses specific noise issues in certain Toyota applications.

TDTG 052620
Multiple Causes for P0562

A customer brought in a 2010 Dodge Journey AWD with the high-output 3.5-liter V6 engine and the 62TE automatic transmission. With a little more than 83,000 miles on the odometer, the complaint was for no upshifts and stuck in 3rd-gear failsafe mode. This concern had started out as an intermittent issue but now had become more regular.

A Very Big Clutch Job for a Very Small Car

My article is going to be a little different this time, and geared more toward the R&R technician. It’s about a car that came to us from a large local dealership that has 13 different locations and works on 14 different makes of vehicles. The subject vehicle is a 2014 Mini Cooper Countryman AWD, with a six-speed manual transmission.

Sensor signal? Nearly none, but unit still worked

The customer had multiple concerns: 30-40 mph is the top speed, drive modes won’t switch, neutrals out in reverse, stuck in low gear at times, can’t shift manually, only works in drive Stored DTC 2767, Component Y3/6n3 (speed sensor) is faulty.

Blame it on the Torque Converter

A 2006 Chrysler 300 AWD came into our shop with a shudder concern. The vehicle was equipped with a 5.7-liter hemi engine coupled with a Mercedes 722.6 transmission, and it had 84,751 miles on the clock. The customer brought it to us for a second opinion. Prior to the visit to our shop, the customer had taken the vehicle to a Chrysler dealer for evaluation. The dealer had diagnosed the problem and determined that a torque-converter replacement was in order.

Serviceability Report: Audi A6

Serviceability Report: Audi A6

Tech to Tech

Subject: Serviceability report
Vehicle Application: 2012 Audi A6 Quattro 3.0-liter
Essential Reading: Diagnostician, R & R
Author: Craig Van Batenburg

Do the German-model engineers care about their technicians?


The ASM Handbook on Fatigue and Fracture (Figure 1) defines fretting as: “A special wear process that occurs at the contact area between two materials under load and subject to minute relative motion by vibration or some other force.”

Fretting wear is usually associated with electrical contacts rather than non-electrical things, but fretting and fretting wear occur with both.

Included in the Quote

Let’s look at an example of what I’ve discussed. Let’s say that you were working on a 2001 Volvo V70 XC AWD, with an AW55-50SN transmission, and the vehicle had been towed in because it suddenly quit moving. You discovered that the transmission had a problem in the final-drive area but you found no other issues. All the clutches were like new, and there was no obvious wear in the valve body etc. That being said, the transmission was probably operating normally just before the final-drive component failed.

Making the Car Disappear

A 1997 Audi A4 Quattro 1.8L turbo (ZF 5HP19) with a complaint that the transmission lost reverse once it was warmed up.

This transmission has a history of chronic reverse problems. The vehicle was scanned with a MODIS and presented the following codes: 00652, 18010 and P1602.