Mismatched Strut (Coilover) Mounts?

Hey all.

On month 4 with the "new" '07 4wd 167k mi. So far really really liking it, but one thing has been bothering me: the truck sags on the front driver's side corner. Not enough to make me think it's dangerous but enough to be ever so slightly noticeable from 15 ft in front of the truck. Haven't actually measured, but there is definitely a wider gap (inch to half an inch) between top of passenger side tire and midpoint of fender vs the driver's side one. I've heard that a small amount of sag is normal but this seems more than other cases I've heard about. Also, the steering wheel isn't quite straight. Truck wants to pull ever so slightly to the left. Barely any pull in right lane on the interstate, but in the left it's annoying and noticeable. Truck was aligned, but problem was still there- no noticeable change.

Here's where things get interesting! Today I got tired of it and decided to give it a really thorough visual inspection in a parking lot. Took some pictures to get angles I couldn't see with my eyes and lo and behold:


I swear to god these are different parts. Center bolt in one has definitely been torqued down more but if you look at the actual plate and rubber pad they appear to be different. Also four outer bolts look like they're different colors.

More relevant info: When I bought truck front drivers side coil spring was very rusty and had broken. Had dealership replace both front coilsprings. They used sensen speedy struts, which are apparently super cheap and wimpy.

Can someone confirm that these are in fact different strut mounts and help me come up with a cost effective approach to getting the front end back up to par. Also rear shocks are original bilsteins and rear springs are so rusty they have got to be original. Should I be thinking about getting those done too? How ok is it to let this stuff ride until it actually fails? Ideally would like to get truck to 400k. Just want some advice.

Thanks

 

It's possible that they're different parts, hard to say. The spring hat is a separate piece that holds the coil in place. Depending on if the new shocks required the coils and spring hats to be swapped over and one hat was junk (unlikely) a new one may have been put on. I would be concerned with the retainer nut that isn't tightened down, it's not even close to being threaded on far enough. As to the lean, that could be the difference between a new coil on one side and an old coil on the other side. That's assuming that the original coil and spring hat was swapped over and the broken one was replaced with new. Some Tundras do inherently have a lean and can be corrected with a Coachbuilder shim.
A simple, quality, reasonably priced solution for the front and rear would be Bilstein 5100's, but will require reusing the coils and spring hats. If you're considering a lift, now might be the time to go for it. Toytec would be a good place to check out as they offer some kits that would replace the leaf packs if you're wanting to replace them.