Originally Posted by klown
Yeah, toyota corporate tells me the rear leaf springs have been redesigned to address the TSB. I tried to get the TSB but was told by toyota corporate that the TSB wasn't applicable to 2008 models. The issue was apparently addressed with a newly redesigned rear leaf spring. I hope this is the truth, cause I like the stance of my truck as it is, I don't really want the rear end to be raised up due to the fourth leaf spring. I'm glad you've given your account with about 400lbs of stuff in the back. When I load my bed up I will check the ride also, but at this point it doesn't look like it's an issue for 2008 model years.
I agree that I like the ride and stance of my truck with the three leaf springs now on it. I have a tonneau cover and a small tool box in back and have only had about 300# of load on it to date. I liked the way it rode then with no squat or bottoming out.
I just checked the #'s on top of the springs and there are more symbols than what the TSB is showing.
The right rear leaf had (++ CHI 48210-04550 F-RH 311007) on it and the left rear leaf had (++ CHI 48220-04190 F-LH 021107) on it. This truck is a 1-08 manufacture date on a Gulf States truck for TX. These are the same #'s of the replaced springs with the addition of the extra symbols. I'm hoping ++ & F for thicker and firmer springs. Anybody have any feedback for the extra symbols.
I haven't towed a trailer with gear in the back to see if it is a issue yet. As stated in a earlier thread the dealer ordered the TSB parts and then declined to do the work until it is a offical TSB for the '08's. Having paid for the TRD and towing packages I expect it to ride more like a truck than a car to perform for what it was purchased for. I feel that my '99 with the TRD package was a way softer ride when compared to this truck.