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Anyone having rear shock “top out” after installing the Traxda rear spring cups?

Coil Spring Specialist spec’d custom rear springs incorrectly and I ended up with 2.25” instead and 1.5” of rear lift. I’ve mostly eliminated the rear shock top out by adding washers on top of the shock like Traxda recommends. However if I hit a big speed bump straight on at 10mph it still clunks.

Has anyone considered the mobility shocks with a rear lift? Does anyone know if they are longer?
 
Anyone having rear shock “top out” after installing the Traxda rear spring cups?

Coil Spring Specialist spec’d custom rear springs incorrectly and I ended up with 2.25” instead and 1.5” of rear lift. I’ve mostly eliminated the rear shock top out by adding washers on top of the shock like Traxda recommends. However if I hit a big speed bump straight on at 10mph it still clunks.

Has anyone considered the mobility shocks with a rear lift? Does anyone know if they are longer?
Yes I have noticed that. I didn’t change anything with the springs and I also ended up with about 1” at the front bumper and 2” at the rear - opposite of what it was advertised for. I think Traxda has just been making the spring spacers too big, and it is tilting the weight towards the front.

I haven’t tried adding any washers (kit didn’t come with them) because I figured they would only add a few mm of rebound. What type of washers did you use and how many? Did you notice any difference? I think I heard of somebody using highlander struts - maybe the shocks would work too and be a little longer? Where are the mobility ones from - I assume from the lifted wheelchair vans?
 
I used 5/8 Zinc Washers. Traxda recommended 1/2”, but I couldn’t fit them anywhere useful. Apparently they will throw in some nice ones they cut with a bandsaw out of tubing if you buy direct from them. I’ve got some more pictures and info on the 3/8” or 9mm improvement in this post. But yes, it helped, but didn’t quite eliminate the issue. It may totally resolve it in the Traxda lift, since it seems to be 1/4” less lift than what I ended up with.

I’m still trying to sort out the part #s on the rear shocks. I was curious if the mobility access van has longer length shocks or not. I’ll have to look into the Highlander option, thanks!
 
Anyone having rear shock “top out” after installing the Traxda rear spring cups?

Coil Spring Specialist spec’d custom rear springs incorrectly and I ended up with 2.25” instead and 1.5” of rear lift. I’ve mostly eliminated the rear shock top out by adding washers on top of the shock like Traxda recommends. However if I hit a big speed bump straight on at 10mph it still clunks.

Has anyone considered the mobility shocks with a rear lift? Does anyone know if they are longer?
That's a great idea. There was a braunability sienna parked near my house a couple weeks ago. I crawled around underneath it to see how they lifted it and also I wanted to measure its height to figure out which lift I want to get traxda or JOR. From the ground to the top of the rear wheel well on my stock 2019 LE AWD is around 31" high. Slightly less on the drivers side. The braunabilty was 34" using this same crude measuring method. 3" difference. Ive read numerous times options for rear shocks on a lifted sienna are very limited. I wonder if the braunabilty will be a tad too long or just right. If you do go that way, please post your findings. Im right behind you guys with the lift... Thanks!
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That's a great idea. There was a braunability sienna parked near my house a couple weeks ago. I crawled around underneath it to see how they lifted it and also I wanted to measure its height to figure out which lift I want to get traxda or JOR. From the ground to the top of the rear wheel well on my stock 2019 LE AWD is around 31" high. Slightly less on the drivers side. The braunabilty was 34" using this same crude measuring method. 3" difference. Ive read numerous times options for rear shocks on a lifted sienna are very limited. I wonder if the braunabilty will be a tad too long or just right. If you do go that way, please post your findings. Im right behind you guys with the lift... Thanks!
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Haha nice, hats off to you for the reverse engineering crawl! I’ve always been curious how they set those up as well. From what I’ve seen, the wheelchair van companies really aren’t keen on selling parts for “off script” applications. They seem to sell it as an entire up-fit.

I’ll post results if I try anything if that nature.
 
Haha nice, hats off to you for the reverse engineering crawl! I’ve always been curious how they set those up as well. From what I’ve seen, the wheelchair van companies really aren’t keen on selling parts for “off script” applications. They seem to sell it as an entire up-fit.

I’ll post results if I try anything if that nature.
Haha, A dirty towel to lay on is the only tool ya need for the ol reverse E. crawl! Something I just thought to mention in case it is relevant. Near me is a messed up road that has a series of off camber rollers with the last one being extra abrupt. You're supposed to only go 35 mph thru there but I drove my recently purchased sienna thru there a bit faster just to "test the suspension". On the last roller I was able to hear that clunk which Im assuming is the shock topping out. Just wanted to put that out there...stock shocks and set up can top out too. In case it matters...
 
Haha, A dirty towel to lay on is the only tool ya need for the ol reverse E. crawl! Something I just thought to mention in case it is relevant. Near me is a messed up road that has a series of off camber rollers with the last one being extra abrupt. You're supposed to only go 35 mph thru there but I drove my recently purchased sienna thru there a bit faster just to "test the suspension". On the last roller I was able to hear that clunk which Im assuming is the shock topping out. Just wanted to put that out there...stock shocks and set up can top out too. In case it matters...
Good to know, the top out is limited now, it was much worse w/o the stack of washers.

Also good to know that the driver side slump is pretty universal too. Must just be the driver side gas tank?
 
Good to know, the top out is limited now, it was much worse w/o the stack of washers.

Also good to know that the driver side slump is pretty universal too. Must just be the driver side gas tank?
I think the slump is common. I've measured a couple siennas around town and they all seem to have it to some extent. 1/4" to 3/4" on average. Soft springs + gas tank + driver on one side equals slump. Did the lift exacerbate the slump or did the amount of slump remain the same?
 
I think the slump is common. I've measured a couple siennas around town and they all seem to have it to some extent. 1/4" to 3/4" on average. Soft springs + gas tank + driver on one side equals slump. Did the lift exacerbate the slump or did the amount of slump remain the same?
It helped the slump. I had upwards of 3/4” and it’s only about 1/4” now.

And prior to the rear springs it would be 1”+ off when loaded or towing. Now it’s pretty much level when loaded or towing now.
 
It helped the slump. I had upwards of 3/4” and it’s only about 1/4” now.

And prior to the rear springs it would be 1”+ off when loaded or towing. Now it’s pretty much level when loaded or towing now.
Yes I have noticed that. I didn’t change anything with the springs and I also ended up with about 1” at the front bumper and 2” at the rear - opposite of what it was advertised for. I think Traxda has just been making the spring spacers too big, and it is tilting the weight towards the front.

I haven’t tried adding any washers (kit didn’t come with them) because I figured they would only add a few mm of rebound. What type of washers did you use and how many? Did you notice any difference? I think I heard of somebody using highlander struts - maybe the shocks would work too and be a little longer? Where are the mobility ones from - I assume from the lifted wheelchair vans?
Found another braunability van today in a strip mall. There is a rectangular shock extender on top of what appears to be the stock shocks for the extra length. Same measurement as the other van I saw, 34” from the ground to the top of the rear wheel well.
The front wheel well is at 32” same as the other van. I can see a spacer up top above the strut to gain the height. I’m impressed with how horizontal the axles angles still are. I wonder if they used brackets to lower the engine?

Anyone having rear shock “top out” after installing the Traxda rear spring cups?

Coil Spring Specialist spec’d custom rear springs incorrectly and I ended up with 2.25” instead and 1.5” of rear lift. I’ve mostly eliminated the rear shock top out by adding washers on top of the shock like Traxda recommends. However if I hit a big speed bump straight on at 10mph it still clunks.

Has anyone considered the mobility shocks with a rear lift? Does anyone know if they are longer?
Found another braunability van today in a strip mall today. There is a rectangular shock extender on top of what appears to be the stock shocks to gain the extra length. Same measurement as the other van I saw, 34” from the ground to the top of the rear wheel well.
The front wheel well is at 32” same as the other van. I can see a spacer up top above the strut to gain the height in the front. I’m impressed with how horizontal the axles angles are. I wonder if they used brackets to lower the engine?
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Found another braunability van today in a strip mall. There is a rectangular shock extender on top of what appears to be the stock shocks for the extra length. Same measurement as the other van I saw, 34” from the ground to the top of the rear wheel well.
The front wheel well is at 32” same as the other van. I can see a spacer up top above the strut to gain the height. I’m impressed with how horizontal the axles angles still are. I wonder if they used brackets to lower the engine?


Found another braunability van today in a strip mall today. There is a rectangular shock extender on top of what appears to be the stock shocks to gain the extra length. Same measurement as the other van I saw, 34” from the ground to the top of the rear wheel well.
The front wheel well is at 32” same as the other van. I can see a spacer up top above the strut to gain the height in the front. I’m impressed with how horizontal the axles angles are. I wonder if they used brackets to lower the engine?
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That is a smart and probably super cheap way they lowered the rear shock mount! Wonder if they sell parts....
 
If you look into it, please let me know or vise versa of course.

How about something like this on the lower end?

I was just looking at those! Haven’t found a match yet though.

I wonder if I could purchase the Journeys Off Road “Rear Bump Stop/Shock Extensions“ separately? If I’m looking at the right part in the picture, I think it is the same concept as the Braunability rear shock extension. Hopefully it wouldn’t bottom out! Although that would be a good reason to replace the XLE shocks with SE’s...
 
I was just looking at those! Haven’t found a match yet though.

I wonder if I could purchase the Journeys Off Road “Rear Bump Stop/Shock Extensions“ separately? If I’m looking at the right part in the picture, I think it is the same concept as the Braunability rear shock extension. Hopefully it wouldn’t bottom out! Although that would be a good reason to replace the XLE shocks with SE’s...
I sent Journey Off Road an email asking about purchasing parts separately. If I don't hear back, I'll give them a call next week. Again the x3 5/8 zinc washer fix the issue 90% of the time, but when you take a speed bump straight on at 10 mph or more it is a rough clunk.

For what it is worth my rear wheel wells on my 16' XLE FWD with custom rear coils is sitting at about 32". And I do still have a driver side dip of about 1/2". I think that is right about where the Traxda has been putting folks in the rear as well.
 
Looks good with the lift, now larger tires are needed to better fill the wheel wheels to complete the look.
 
I gave Journey’s Off Road a call today and they don’t sell the “Rear Bump Stop/Shock Extensions” separately.

I’ve got some more info from JOR in this post.

I’ll avoid nailIng speed bumps straight on at speed for now! I’ll post if I do anything to address it, but I’m planning on leaving it along for now. And again, I bet the 5/8” washers would help most folks with the Traxda lift.
 
If you look into it, please let me know or vise versa of course.

How about something like this on the lower end?

I called ReadyLift and they do not sell any Toyota components separately (like they do for some domestic applications). They also could not confirm any measurements for any of their other products (looking forward any cross compatibly).

Only other option is having a shop custom fab some shock extensions for the top end like the Braunability vans use. You’d have to get it spot on or risk bottoming out, which would probably be much worse than the occasional top out.
 
Found another possible shock top out solution: using mobility shocks?

I contacted KYB regarding their different shocks and they confirmed that the mobility version is 1” longer than the non-mobility and has a slightly longer stroke length.

Does anyone know the OEM shock overall length and stroke?

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