I just had the rear leaf spring TSB performed on a 2011 Tacoma Prerunner SR5 Non TRD 2.7 w/auto trans. I picked up the vehicle after the service department closed for the day and noticed they did replace the rear leafs but the new springs used are also 3-leaf...
This dealership was very confused about whether or not the TSB would even apply to the vehicle and required Toyota Corp tell them several times that this was a covered expense and did apply to my vehicle. Anyway after the third time of dropping the vehicle off at dealership they scheduled the TSB to replace the springs. The part number for the original rear leaf spring was stamped or painted on with lettering of CHI 48220-04191 LH , I only took picture of one side so can't recall the spring identification of other side.
The new 3 leaf spring that they installed has a sticker as i highlighted in bold as follows:
Driver side - Spring Assy FR LH 48210-35A40
Passenger side - Spring Assy LH 48220-35040
The vehicle is Exactly the same ride height as with the old springs (35 1/4") and exhibits no more firmness than the original set of 3 leaf springs. Are the above parts they used both for the left side? LH?
I need to be 100% sure of the correct part numbers for this vehicle, the dealer will say anything to push this over. I will need to call Toyota to support this but first need to be accurate with the correct part numbers for the vehicle specific springs.
I have the TSB http://www.tacomaworld.com/forum/att...sb-0359-10.pdf and on page 3 it shows parts information (old and new) but and they definitely don't match what's been installed on my vehicle.
The parts may be slightly different for non TRD and model specific... if you have the 4 cylinder double cab Non TRD auto it would be a tremendous help if you could confirm the spring part numbers after a successful TSB, I have heard that some are being performed with a 3 leaf TSB with added support (instead of a 4 leaf upgrade).
I have not loaded the vehicle so can't say for sure if it sags or has a harsh ride.