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BDS Coilover Lift Questions

TrailEarnhardt
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TrailEarnhardt Enthusiast

TrailEarnhardt

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I'm looking to lift my 2020 Trailboss, to stay safe I'd like to go with a full lift to keep my angles flat. Originally I looked at the Bajakits king coilovers and a arm setup, but that doesn't lower my diff. I daily drive my truck and am a first responder therefore I drive in the rain/sleet/hail/snow so keeping 4wd auto is a deal breaker for me (readylift SST out of the running). Which leaves me BDS I'm between doing the 2.5" fox coilover lift or doing the spacer lift and going 4" (6" overall) if I have to buy new wheels. Budget is already stretched if I go coiovers so new wheels on top of lift and tires doesnt work. What I am wondering is if anyone has had success with the stock 18s and running a wheel spacer? I genuinely would like to stay in the 4" total lift department as I have an infant and wife uses truck occasionally so lifting him in and out of big truck is a hassle. Hoping someone has had success with the stock 18s and BDS 

Dunn Senior Enthusiast

Dunn

Posted
Posted (edited)

you can just get a differential lowering kit......they are just spacers and a bolts, not much to it and can find them everywhere

 

baja kits is solid as well as BDS

 

curious on why a trail boss if your gonna scrap out suspension anyway?

 

the KINGS are friggen pretty sweet especially if they are custom tuned 

Edited by Dunn
Supercup Enthusiast

Supercup

Posted
Posted (edited)

I have a 2020 GMC AT4 - I installed 2.5" BDS coilover lift (so 4.5" overall)- it will work with stock 20" wheels - but not likely with stock 18".  the AT4 18" is 26mm offset (5.75" of backspacing +/-) - so the tie rod from the BDS lift hits the edge of the wheel and tire, so you have to push the wheel out.  I have Method 18x9 NV wheels with 18 mm offset (so about 1/2" more inside clearance - 5.25" of backspacing than stock).  I tried a 1.25" extension - did not clear - so we ended up doing wheel lug extensions and getting enough bite on lugs to make it work, but I would not consider it ideal.  You need an 18" wheel with 4.5" of backspacing.  On the 20" wheel the added diameter allows for the tie rod to be "inside" the radius of the wheel, so you can run stock 20's or other 20's with up to 5.5" of back spacing.

 

I would confirm the offset of your stock Trail Boss wheels - if 26mm like the GMC AT4, you will have a tough time making it work without new wheels.   I can tell you that the suspension performs very well on road and is night and day difference off road.  If you go that route be sure and get the DSC upgrade so you can adjust compression and rebound to your driving conditions! 

 

Here is a few threads about it with photos and showing you clearance issues.   Note I had a 2019 AT4 with Ready Lift SST kit before and the CV angles were really bad - with BDS, it is dead level.  I would definately go that route, even if you just buy the lift initially and add shocks later, to get the level axels. 

 

Link:

 

 

Link: 

 

 

Edited by Supercup
Flatblack83 Enthusiast

Flatblack83

Posted
Posted (edited)
On 11/7/2020 at 6:53 PM, Dunn said:

you can just get a differential lowering kit......they are just spacers and a bolts, not much to it and can find them everywhere

 

baja kits is solid as well as BDS

 

curious on why a trail boss if your gonna scrap out suspension anyway?

 

the KINGS are friggen pretty sweet especially if they are custom tuned 

No you can't get a diff drop kit for these trucks, take a look under and see. To lower it the xmember is in the way.  I looked at doing it to mine, the drive shaft would run right thru the xmember.

 

To do any of it right with more lift than 3.5 total you need to but a real lift with drop xmembers and diff drop. At 3.5 4x4 works fine and no vibes at 8k miles.

 

 

 

Edited by Flatblack83

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