Originally Posted by BamaToy1997
While I agree with a lot of what you are saying, I have seen bad pressure plates cause the sensation he is describing. I am interested in the information you have found on LUK clutches. I have installed many of them in customer vehicles and have had no complaints from any of them. where did you find this information at so I can check into it? Or is this just from the older manufacture LUK clutches?
As for replacement clutches I installed a Banhauf Stage 3 clutch kit in my Tacoma, and couldn't be happier.
Of course, it could be an actual clutch problem. The point I was making is only that it may not be. In case it isn't, it would be premature to pull the transmission before looking over the other possibilities, which are much easier to deal with.
There is actually a lot of information about the LUK clutches, but realize that it applies specifically and ONLY to Tacoma 4-cyl 2005+. The most obvious being simply the number of revisions made to the parts (updated part numbers). Another source of information is the wording of the service bulletins, which say very specifically that all replacement parts are to be AISIN parts. If not wholly conclusive, this certainly implies that they are aware that the problems can be associated with the non-AISIN parts. Finally, there are the results posted on the internet regarding what comes out of a truck after any kind of clutch failure. Absolutely every report of low mileage clutch failures where the failed components are identified by manufacturer, identify LUK parts.
Now you know certainly that given component revisions, changes in manufacturing process, and simple quality control, components from a single manufacturer can vary. In fact, I would be very shocked if the actual low mileage failure rate of LUK clutches even reached 10%. Most, I'm sure, last a much more respectable amount of mileage. By low mileage failure, I mean something in the range of 15 to 25 thousand kilometers. And yes, I'm sure that there are some AISIN clutches that fail with low mileage as well. However, it does look very much like that failure rate for LUK clutches is FAR higher than AISIN.
Mine came from factory with a LUK clutch. It failed at 15,000 km and was replaced with an AISIN CTX-107 under warranty/TSB. Symptom was weak engagement and slipping under high torque -- it would let go while climbing a highway hill in 4th gear under full throttle. The friction disk didn't show any significant wear as it would have had it failed due to wear caused by my own incompetence. The warranty failure report was something to the effect of "clutch slipping due to weak pressure plate". I've put over 35,000 km on the AISIN and find its engagement to remain very firm and confident. During the whole warranty process, the dealership was in full communications with me, they found the TSB indicating the AISIN parts to be installed and ordered them before dropping the transmission. When they finally took it apart, they called me up and asked me "guess what we found in there?". My response was "you found a LUK clutch and pressure plate." -- "How did you know???"... I did my homework and knew exactly what to expect.
It is also worth noting that the AISIN parts have undergone a revision in the last year and a bit as well. Specifically, the pressure plate has been changed from an AISIN CTX-106 to a CTX-107. The CTX-107 seems to be intended for a higher power application, but meets the same physical dimensions, so is more or less interchangeable. Both of these clutches have been in use for years, the CTX-106 was originally matched with the 3RZ-FE, the CTX-107 was matched with 5VZ-FE. That difference is 40 hp and 43 footpounds. The current 4-cyl is power/torque wise, somewhere between those two, yet was equipped with the weaker clutch parts. Nevertheless, I haven't heard of any failures of the CTX-106. This part change may be more a "f**k-it" move or a matter of ceasing production of the CTX-106, than of an actual necessary upgrade. This part change could also be simply to address consumer confidence. Getting the consumer to think of it as a "heavy duty" clutch can surely go a long way in making them feel better about the vehicle after a low mileage clutch failure.