Active Offroad Bumpstops for the Colorado ZR2 - Why I would reconsider my purchase & what worked out
ฝัง
- เผยแพร่เมื่อ 6 ก.ค. 2024
- If your Chevrolet Colorado or GMC Canyon has even bottomed out the rear suspension due to some spirited driving or under max payload you know how harsh the factory bump interaction with the frame can be. Timbren offers a variety of suspension components to aid in getting the most for your application but specifically makes the Active Offroad Bumpstop to help out those of us who carry more gear and are near limits of our suspension but still enjoy a good day playing in the dirt.
This is an easy installation which will take about an hour to complete. Assuming you have all the right parts in the box, there is no cutting or fab work and it remains a true bolt-on product. The end result is a very functional bumpstop that improves comfort, drivability and mitigates unwanted transfer of energy at full compression.
Rear Active Offroad Bumpstop with U-bolt Flip kit: timbren.com/i-30497567-active...
Rear Active Offroad Bumpstop kit: timbren.com/i-30497560-active...
In the video, I cover how I completed the installation on my ZR2 Bison with the means and skills I have. See what I did and figure it out for yourself or when in doubt get it installed by a professional.
00:00 Intro
00:28 Bumpstop with U-bolt Flip Kit vs Bumpstop only Kit
01:24 Unboxing
01:38 Fitment issue with stock ZR2 applications & Flip Kit
02:56 Upgrading supplied U-bolt to M14 / 9/16"
03:51 What does an Active bumpstop do differently
04:40 Installation - Jacking and OEM part removal
06:56 Installation - U-bolt Flip kit
08:43 Installation - Torqueing down the U-bolt
10:11 Product recap and installation impressions
10:56 Why I would reconsider buying the U-bolt Flip Kit - ยานยนต์และพาหนะ
Running the front and rear Timbren offroad Bumpstops. Highly recommend them! Another great well explained install video!
Front Installation coming soon. They are a little less eventful.
@@exhaustinglife Some use the Timbren steel cup, some don't on the front.
@@madcratebuilder The cup changes the feel for a firmer spring rate. Ill see what feels good. With that being said there are 2 spaces for changing the bump initial engagement point.
Thanks for sharing! I need to get a set of Timbren for my rear of my Land Cruiser.
Are you seeing issues with hitting bump stops? I typically would say that I didn't need these until i had 800+ lbs of payload and tried to treat my truck like a Raptor ;)
@@exhaustinglife I'm still running the oem ones in the rear. I'm more afraid of losing a spring while over flexing the rear and it not hitting a bump stop on some of the trails. Correct me if I'm wrong of this possibility.
I am planning to go with the timbren bumpstops as well. They are recommended for towing as the multimatics sag under little tongue weight.
Timbren has 2 types. The Active Offroad Bumpstop is more for dampening the immanent impact. They have the SES Bumpstops which are more for additional spring rate and towing / leveling loads with a trailer or heavy payload. The SES system has a different spring rate and is designed to carry constant load vs bottom out protection. timbren.com/i-30497768-timbren-ses-suspension-enhancement-system-sku-gmrcca-rear-kit.html#!year%3D2021%7C%7Cmake%3DCHEVROLET%7C%7Cmodel%3DCOLORADO%7C%7Csubmodel%3D4WD
Multimatics shocks don't support the load, the springs do; so it'd be the springs sagging. Shocks just dampen the travel of the axle.
@@BowTied69 You are 100% correct . Shocks in a leaf spring vehicle do not carry any load and no matter what dampener you place in it, the culprit for sagging is the leaf spring or other helper devise. The Timbren SES or other like devises are made to hold the vehicle ride height and add spring rate o alleviate sag.
Great video. As always straight and to the point. I have a question:
** You've done a lot of great mods. Why haven't you gone to a set of better full leaf springs in place of the add a leaf?
The performance of full leaf springs with the 8 or 10 thinner leafs are much more progressive and you can also opt for higher capacity rating.
Thanks
Thank you. I had intended to have a custom pack made for my weight / payload but I was on permahold during the pandemic with my prepaid order never not arriving in a timely fashion. I would absolutely replacement leaf pack to remove the stock overload 2 stage set-up for all the reasons you stated. The add-a-leaf was just to get me by.
@@exhaustinglife Thanks for the reply. I'm going with the Deaver Expedition pack.
Just make sure you have an replacement bolt for the front mount on the gas tank side. You need to cut off the stock bolt because the gas tank is in the way. It's a m16 x 2.0. You can get a grade 10.9 yellow zinc from Mc Master Carr. The oem bolt will be too long. I'm checking into the Length needed.
I think you also need longer u bolts if you are going to keep the stock ZR2 spacer block. I'm checking on this.
Question:
When you had the 285x70x17 and Zero offset wheels with the AEV trim kit.
Did everything clear at full stuff, off and rock road crawling without any issues?
Was it necessary to do the trim kit on the rear or would it clear without it?
Thanks very much for all you videos. I really appreciate how through you are and the attention to detail.
@@mark-kf3md The front cleared full stuff but I also had the Eibach leveling spring on the OEM Multimatics and later the Kings with another 3/4" over that combo. The front did extremely well and I never experienced contact. The rear would contact under full stuff without the trim kit which I do mention in the rear installation video. I went as long as I could but eventually the contact started to catch the flare and was causing damage to the mounting screws and would eventually tear up the flare.
@@exhaustinglife Thanks
I'm now thinking of selling my 2018 ZR2 diesel and getting the new 2023 ZR2 or the AT4X. From what I've seen so far they have improved and added quite few things.
Any thoughts on those?
SumoSprings has a direct bolt on for the Zr2 and bison. I've been running them on my daily driver and great for towing and off road use. Please check out SumoSprings. Band of brothers and sisters 🇺🇸🇺🇸🇺🇸
I did research the Sumo spring offering but I didn't like the inverted attachment point having the bumpstop mounted to the frame vs replacing the original bump using the strike plate on the frame as intended.
At the time I got the Timbren U-Bolt Flip kit, I was not aware of the Sumo Spring equivalent. I did watch a few of the explanation videos where they compared the 2 and didn't care for the Superspring's approach to implying that a synthetic material is the only way to get a progressive rate (I know they never said it in so few words, but they definitely pushed the issue with charts and graphs.) As a discerning consumer and engineer I was put off but the fact that they ignored how the structure and shape of the Aeon rubber Timbren devise could achieve similar progressive feel... It's all marketing but they don't seem to make bad product and I would be willing to test and compare them in another application.
So I have this kit on my Chevy Colorado LT. 2015. I was also skeptical about the set up due to the M55 leaf pack I got from deaver. It bolted right in. Didn’t want lift blocks due to axle wrap and it just doesn’t look right. Granted the zr2 has them stock. It’s the lift block that gave you an issue.
The ZR2 leaf pack and block are different than the LT spring from factory. The product is not correct for the ZR2 and it has to do with the U-bolt change that happened some time during 2020. If you watched the video all the way through I said multiple times it has to do with the ZR2 rear suspension specs and the change in U-bolt suppliers.
Neeks, I have a 2016 LT and was looking at getting the M55 package to level out my truck after putting on 2.5” icon coil overs. Questions... how does it ride when not loaded down? All I have on is a Snug Topper. How much height did you gain from the M55? What is your overall opinion on the M55? Thanks.
@@seth8982 overall opinion my brotha is, it’s one of the best mods I’ve done. For the first 2 weeks when I installed the pack I put my old pack in the back to add some weight. Drove it around for about 2 weeks. It exposes the front end. I have coil overs in the front but it’s so plush in the back, you feel bad for the front. Noise from the rear end is gone. Not a stiff ride at all. Thing that gets me is it’s a 3-4 inch lift. I was told it was 2 inch lift. I have coil overs in the front and I not have a rake like I did from the factory again. So I gotta invest in the front end. Overall it’s great!
@@exhaustinglife love your videos but I don’t think Chevy made different leaf pack for each Colorado trim level. First of all that’s too expensive for Chevy, the zr2’s and the normal Colorado’s have the same leafspring squeak. All that. Only difference is the casted block they put on to add height. The mechanical parts are different like your 3rd member and your transfer case. You have the same leaf count as the LT. It’s not thicker. It’s just steel leafs.
@@neekshernandez5894 I know for sure that they are.
You will also find that GM designates a different part number for ZR2 / ZR2 Bison and the Z71 trim and lower with the same wheelbase and engine configuration.
Additionally AEV and Multimatic have also noted the changes in spring rate as parts of the development and design of their Tier 1 supplied products.
Inside of my own experience, I have had the the rear leaf packs replaced under warranty and had a good deal of time to look into the replacement parts that took a few months to get in.
While the leaf count is the same the total pack spring rate is notably different. This is the primary reason for the 2000 lbs lower towing capacity of the ZR2 (5k vs 7k of the Z71 and lower trims.) This is directly a result of the "softer" / lower spring rate.
Why add that with those shocks and stabilizers hanging down?
Not sure what you are exactly asking? Why add active bumps with stock shock mounts? Do you mean anti sway bars for stabilizers?
Thanks for the video! I have a set I need to put on. What size socket for the u-bolt nuts to remove the oem one?
You are welcome. I will post up the size shortly .. i think its 21 mm but I will double check.
Do you have plans to use the front active bumps from timbren? As well as 589 rear shock relocation to fix the ground clearance.
I do have the front and do plan an install video for them as well. I am not a fan of the current shock relocates. The old 589 design does limit wheel travel and total articulation. It also limits wheel and tire selections due to the space needed in the fender well. I am still not sold on the idea that the majority of users need more ground clearance. I have definitely used all the skid plates and the shock skid but have never been hung up on the lower shock mount and its why my comments at the end of this video were that modifications that attempt make more ground clearance do so at a higher cost and have questionable benefit.
I still feel that if you are looking for more of a baja vs crawler utility and like the look of outboard shocks, there are other things I would spend my money on. If you are looking for more of a crawler with larger, wider tires, want maximum wheel well tire clearance and stock or more articulation this mod does not achieve any of that.
Thank you, as always. Great info. At this point you already have the additional leaf installed, correct?
Yes, I have pictures from before with the stock leaf packs but at the time of the install and filming I had already installed the add-a-leaf.
@@exhaustinglife Thank you!
@@exhaustinglife Is it the AAL that made the U bolts too short? Also, do these Timbrens impact off-road axle articulation/travel good or bad? Great vid.
@@BowTied69 No, not in this case. The AAL will eat up about 3/8" of the thread but as i explained in the video my first attempt at installing was BEFORE the AAL install. I put up some pictures of that in the beginning.
The U-bolts show in the video are the OLD spec U-bolt that Timbren provided and work fine. Sometime during 2019-2020 Timbren switched supplier or just went to this shorter U-bolt and Nylock.
So far the the bump when engaged are less harsh and they appear to stop the up travel within about 1-2mm above the stock bump line observed before. I am basically comparing the "line" of dirt on shock shaft and where the wiper stops pushing the dirt. This is a crude measurement as i cant tell if it during individual side articulation or at flat bump but I'm confident it doesn't have large change based on that observation.
The link to the bumbstop say its for a tacoma. I'm guessing it will work for the zr2?
They are the same part, except the ZR2 requires longer u-bolts
@@exhaustinglife could you send me the link to the longer u- bolts i can't seem to find them
@@afroget4 the part number is OMEU59C - google to find your best outlet and pricing.
Do you have a p/n or specs on the longer u-bolt that you used? I have this kit sitting in my garage for the ZR2 but can't find the correct size for the u-bolt that I need.
In the video I had a friend who had the "older" Tacoma u-botls that were supplied by Timbren but ended up getting Old Man Emus
Old Man Emu part number OMEU59C
Have you had a chance to tried the bump stops at high speeds ?
The only reason I added them was to mitigate bottom out impact at moderate to high speed.
In my use I would travel with 600lbs to 800lbs payload while driving on trails with higher degrees of articulation at slower speeds
@@exhaustinglife thank you for the reply
Im between getting new upgraded rear shocks plus the timbren active bump stops or invest in fox hydraulic bump stops and keep factory rear shocks
Since they’re about the same price range
What would be your advice in which to get ?
@@josuemartinezmtz I am not sure the hydraulic bumps pair well with the Multimatics (which have their own bump stage) with higher payloads and stock geometry. I opted for more travel with the Kings shocks and AAL with Timbren bumps to get what I needed.
If I was doing more higher speed desert / baja stuff I would have configured my truck differently and would not be able to carry all the gear I have. Its very difficult within the range of stock geometry to have the best of both world for max payload and technical speed damping at higher speeds.
So would you reccomend just buying the bumpstops and skipping the U bolt flip kit?
Yes, exactly. It's more cost-effective and will perform the same.
Should have removed the shim at the top of the leaf pack, that would make the U-bolts the proper length.
Unfortunately modifying the stock pack makes my point in this video. This kit works fine with the NON-ZR2 applications (base-Z71) but is not an exact fit without buying the Longer U-Bolts - Old Man Emu OMEU59C
why not hydraulic bumpstops?
There are not any bolt-on options I was interested in pursuing. Hydraulic are definitely an option but a set of Kings would run double and still require some engineering to weld into my existing geometry.