vibes after suspension tsb upgrade
1 - 16 of 16 Posts
i dont know about centering pins..i was told theres only i way to set the leafs, they did an alignment after the springs and shox were replaced..theyve got my truck and said they were talking to factory..coincidently another customer was there for the same thing..theyve got til tomorrow to experiment and then i am taking my truck back..i need it for work.also, maybe they can experiment on someone else..i wondered if this tsb was going to cause probs ?? thanx for the reply
ps, by the way..the problem is more of a gyrating hum..no vibration is felt..
ps, by the way..the problem is more of a gyrating hum..no vibration is felt..
I have't had any problems with my TSB, but then again.....I put 210lbs in the bed after they installed it (winter).
Try this - Put a bunch of weight in the bed (200lbs maybe?) and drive it around. See if the humm/vibes go away when you're up at 55mph. If your truck rides totally smooth, then that's most likely due to some very minor driveline issues with the new springs/lift. Generally, you wouldn't get vibes with only 1" or so of lift in the rear...but every truck & situation is different.
If after putting the weight in the bed and you still get the vibes....than it's probably related to their installation or allignment.
Take it back to the dealer and explaint to them the results. Have them atleast check to make sure everything is tight and verify the allignment.
Try this - Put a bunch of weight in the bed (200lbs maybe?) and drive it around. See if the humm/vibes go away when you're up at 55mph. If your truck rides totally smooth, then that's most likely due to some very minor driveline issues with the new springs/lift. Generally, you wouldn't get vibes with only 1" or so of lift in the rear...but every truck & situation is different.
If after putting the weight in the bed and you still get the vibes....than it's probably related to their installation or allignment.
Take it back to the dealer and explaint to them the results. Have them atleast check to make sure everything is tight and verify the allignment.
Well, if they "coincidentally" had another customer for the same problem, they probably screwed up.
When replacing the springs, if they loosen both sets of u-bolts at the same time, then the axle can rotate pointing the diff pinion further up or down. Won't take much to cause an issue (search for discussions on U-joints). Unless you have a CV equipped drive shaft (aftermarket) both U-joints need to be at equal and opposite angles to cancel out the "vibration" (actually, an alternating angular velocity) inherent in U-joints. If the diff pinion is not at the same angle to the ground as the tranny output, the u-joint angles will be different, and the oscillations produced by them will not cancel out. Have them check the angle of the tranny output to horizontal and that of the diff input (pinion shaft) to see that they are equal.
Barring any really bad errors on their part, that's the problem.
Only other thing that comes to mind is if the axle is not located square to the vehicle (creating another rear u-joint angle, but in the horizontal plane). But that would require not seating the axle on the center of both springs. I would suspect that you would notice a tracking prblm as well.
When replacing the springs, if they loosen both sets of u-bolts at the same time, then the axle can rotate pointing the diff pinion further up or down. Won't take much to cause an issue (search for discussions on U-joints). Unless you have a CV equipped drive shaft (aftermarket) both U-joints need to be at equal and opposite angles to cancel out the "vibration" (actually, an alternating angular velocity) inherent in U-joints. If the diff pinion is not at the same angle to the ground as the tranny output, the u-joint angles will be different, and the oscillations produced by them will not cancel out. Have them check the angle of the tranny output to horizontal and that of the diff input (pinion shaft) to see that they are equal.
Barring any really bad errors on their part, that's the problem.
Only other thing that comes to mind is if the axle is not located square to the vehicle (creating another rear u-joint angle, but in the horizontal plane). But that would require not seating the axle on the center of both springs. I would suspect that you would notice a tracking prblm as well.
i have an 06 access cab trd o/r v6 4x4. got the rear tsb done in december. 2500 miles later my rear end is still 3 inches higher than front with full tank of gas. once in awhile when i'm driving on interstate i feel a very slight vibe in floor now. when i had my shurtrax (200 lbs) in the back for snow/ice, the rear end drops about 1/4 to 1/2 inch. no vibes while running with weight in rear. coincidence? i think NOT!!!
my a** sticks up so much higher than front. can't wait to get 5100's.
For those of you wondering what shurtrax is it's a bladder that is filled with water and sits in back of truck for winter weight. it can be frozen and have 500# placed on top of it. no need for sandbags or cement or whatever else. i'll post pics with my new camera soon.
my a** sticks up so much higher than front. can't wait to get 5100's.
For those of you wondering what shurtrax is it's a bladder that is filled with water and sits in back of truck for winter weight. it can be frozen and have 500# placed on top of it. no need for sandbags or cement or whatever else. i'll post pics with my new camera soon.
Well, that's another possibility, I suppose. If you get past 3 degrees, the vibration in the drive shaft alone will start to communicate thru the drive train -it's also not very good for the U-joints. But 3" extra height seems like an awful lot. I'd pull out the TSB and look around under the truck and make sure they didn't screw up. I didn't get anywhere near 3" lift.
If you can get an angle indicator, check the angle of the drive shaft vs the tranny, and drive shaft vs differential (check tom wood's site for suggestions on how to do it). The difference btwn D/S and Tranny as well as the difference btwn D/S and Diff should not exceed 3 degrees.
If you can get an angle indicator, check the angle of the drive shaft vs the tranny, and drive shaft vs differential (check tom wood's site for suggestions on how to do it). The difference btwn D/S and Tranny as well as the difference btwn D/S and Diff should not exceed 3 degrees.
alignment
The TSB requires a alignment inspection and adjustment after the new leafs are installed. It also covers toe-in adjustment and inspection of wheel turning radius. I truly doubt that many dealerships bother with these checks. Heck my dealership didn't look at the TSB enough to even order the correct parts. They first ordered and installed the original parts. It wasn't till I got home and checked that I saw the leafs were still the same that I started checking part numbers. I took it back and when I questioned them they assured me that they had ordered the right parts. I had to show them the TSB and point out the part numbers before they admitted that they had indeed ordered original shocks, leafs and springs. They had to eat the original order and re-order and do the job over. I really doubt they did things like checking alignment. If they had the first time they would have noted the difference in noted height in the TSB alignment notes.
The TSB requires a alignment inspection and adjustment after the new leafs are installed. It also covers toe-in adjustment and inspection of wheel turning radius. I truly doubt that many dealerships bother with these checks. Heck my dealership didn't look at the TSB enough to even order the correct parts. They first ordered and installed the original parts. It wasn't till I got home and checked that I saw the leafs were still the same that I started checking part numbers. I took it back and when I questioned them they assured me that they had ordered the right parts. I had to show them the TSB and point out the part numbers before they admitted that they had indeed ordered original shocks, leafs and springs. They had to eat the original order and re-order and do the job over. I really doubt they did things like checking alignment. If they had the first time they would have noted the difference in noted height in the TSB alignment notes.
Joined
·
93 Posts
I had the same problem. The dealer has had it about 8 different times now to try and correct to no avail...... The vibe is there between 52 an 68 mph.
I sent a scalding email to the SM and demanded they put the original stuff back on. I was adamant that they would get the truck back only 1 more time to fix it....
They called and we compromised. they would get 1 more shot at getting it corrected. if they dont get it this time, they will put the stock stuff back on. It is at the dealership now fro their final attempt at repair.....
NOTE----- The dealer just called while i was typing this. Said it's better but still there. Supposedly, Toyota has identified the issue as a side to side (rather than up and down alignment of the DS. It only affects some, not all..... He says they will have a new transmission mount(????) that will fix as soon as Toyota ships them.
Now I gotta decide whether to wait or just say screw it and go back to the 3 leafs... I'm now at almost 60K miles. i'm thinking hard about having it set back to stock prior to 60K.....
What do you guys think? Wait and hope for a fix or just cut my losses and get 3 leaf back on?
I sent a scalding email to the SM and demanded they put the original stuff back on. I was adamant that they would get the truck back only 1 more time to fix it....
They called and we compromised. they would get 1 more shot at getting it corrected. if they dont get it this time, they will put the stock stuff back on. It is at the dealership now fro their final attempt at repair.....
NOTE----- The dealer just called while i was typing this. Said it's better but still there. Supposedly, Toyota has identified the issue as a side to side (rather than up and down alignment of the DS. It only affects some, not all..... He says they will have a new transmission mount(????) that will fix as soon as Toyota ships them.
Now I gotta decide whether to wait or just say screw it and go back to the 3 leafs... I'm now at almost 60K miles. i'm thinking hard about having it set back to stock prior to 60K.....
What do you guys think? Wait and hope for a fix or just cut my losses and get 3 leaf back on?
dataguy,,hang tight...i dont know bout you, but i like my truck with the upgrade..its more truck period..engineers from toyota were looking at mine while at the dealer the other day..according to my advisor..theyre working on a fix..and he seems to feel that it wont be too long....i say we give em a little time to work this out..mines mor just an annoyance, i just turn up the tunes !
ps, my vibe comes in between 58 and 68.mph .pretty close ey??
ps, my vibe comes in between 58 and 68.mph .pretty close ey??
Joined
·
93 Posts
It's an '06 AC 4x4.......
I went ahead and told my dealer to order the stock parts. It didnt really bother me with the soft suspension unless I was loaded. I own a trailer so I'll just use it for heavy hauling.....
That vibe, although not severe, annoys me to no end. It also concerns me that it causing wear on something that will eventually fail. i usually keep my Toyota trucks for 5 years and rack up 200K miles on them before trading. i dont want to take any chances.....
Hope that they fix it for all of ya'll.
Joined
·
96 Posts
I've been following this issue, but I still need to have the TSB done because of the weight that I need to carry and also because I tow a small boat (with a sometimes heavy tongue weight).
Do you think that it would help if I showed this article to the service manager and asked him if he could have his guy replace one side at a time so as to keep the angle of the differential locked in at all times? I see that there are at least two possible problems - wouldn't this help avoid rotation of the differential where the axle is the axis?
Do you think that it would help if I showed this article to the service manager and asked him if he could have his guy replace one side at a time so as to keep the angle of the differential locked in at all times? I see that there are at least two possible problems - wouldn't this help avoid rotation of the differential where the axle is the axis?
FWIW, had my 06 Access PreRunner 4x2 changed to the four leaf springs on 2/4 and no vibration issues up to 75. Asked for and got a copy of the alignment results for future comparisons.
Like the slightly stiffer ride, less Camry like. Wife even commented the ride seemed better.
Like the slightly stiffer ride, less Camry like. Wife even commented the ride seemed better.
Joined
·
96 Posts
As a followup, I had the TSB done at Toyota of Orange in So Cal. When I brought the truck in, I had a copy of this thread in hand and asked the service writer if there were any measures that the tech could use to avoid the vibration issue. He said that he had done several with no problems and that he would leave the copy on the seat for the tech to review. I basically let him know that I would be looking for a problem.
Truck was ready about 5 hours later (some waiting and some labor - about 2.5 hrs). I measured before and after and I only gained a half inch in the rear. Funny how that small of a gain seems larger behind the wheel.
It was bumper to bumper on the way home, so I couldn't really get up to speed, but there was no noticable vibration. The next day, I took it out on the open road and was not able to detect any unusual noise or vibration or humming. The ride was much firmer without being harsh.
Having some confidence now that the TSB has not caused any problems for me, I am moving on to the next phase. Last night, I installed the rear 5100's and I may be taking the truck to Bear Frame and Wheel to have the shocks and alignment done. Greg said:
Swap front shocks and align = $170
Swap shocks only = $120
I pull shocks/coil and he compresses springs and changes shock = $20 each side
I will let you know if I get any noise/vibration from this next phase.
Truck was ready about 5 hours later (some waiting and some labor - about 2.5 hrs). I measured before and after and I only gained a half inch in the rear. Funny how that small of a gain seems larger behind the wheel.
It was bumper to bumper on the way home, so I couldn't really get up to speed, but there was no noticable vibration. The next day, I took it out on the open road and was not able to detect any unusual noise or vibration or humming. The ride was much firmer without being harsh.
Having some confidence now that the TSB has not caused any problems for me, I am moving on to the next phase. Last night, I installed the rear 5100's and I may be taking the truck to Bear Frame and Wheel to have the shocks and alignment done. Greg said:
Swap front shocks and align = $170
Swap shocks only = $120
I pull shocks/coil and he compresses springs and changes shock = $20 each side
I will let you know if I get any noise/vibration from this next phase.
1 - 16 of 16 Posts
