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Boomer215

By Boomer215
in Modifications, Wheels & Tires

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Boomer215 New Member

Boomer215

Posted
Posted

I ordered a 2021 trail boss 4WD 6.2. Im going to level it with a ready lift that includes the control arms 1 ton ball joints etc...Has anyone used this leveling kit and would I be able to fit with (out rubbing) 20x12 -44 offset with 33 12.50R20LT?

1Silverado9 Enthusiast

1Silverado9

Posted
Posted
51 minutes ago, Boomer215 said:

I ordered a 2021 trail boss 4WD 6.2. Im going to level it with a ready lift that includes the control arms 1 ton ball joints etc...Has anyone used this leveling kit and would I be able to fit with (out rubbing) 20x12 -44 offset with 33 12.50R20LT?

I have a 2020 RST Duramax with the Trail Boss Lift and the ReadyLift level kit...runs smooth! Im not sure about your tire question but it definitely runs smooth and no strain to front end components...

092733B8-A3AE-45AB-AA0B-C958ED8F531B.jpeg

EFB1835F-7E63-495D-A2A4-448EA27F2143.jpeg

9766AC22-1EC9-4EBB-96F1-1D5945BDF707.jpeg

Supercup Enthusiast

Supercup

Posted
Posted (edited)

Here is the issue - you start with 2" of OEM lift - you add 2" level kit with RL SST kit.  It is a nice kit - had it on my 2019 GMC AT4 Carbon Pro.  They have a note in there than you "should not use auto 4wd" with the level - issue is the angle of the CV axels is pretty extreme and they had some customers with issues with auto 4wd shifting in and out at various speeds and putting heavy load on front diff due to angles of axels and cv's.  I ran my 2019 for10k miles with it, had no issues, but never used auto 4wd.   Not ideal, but as good as any other level.  When you call knowledgeable offroad shops it is common knowledge (to them) that anything over 4" of lift really needs a drop bracket for the front diff.  So level kits on AT4 and Trial Boss are at that edge. 

 

I swapped my 2019 for a 2020 with trailer tow mirrors and better camera tech for trailering.  I decided to do it right and went with BDS lift kit, which lowers the front diff - so the axels are dead level.    I posted some photos below so you can see the difference in angles for yourself.  BDS and Zone (who is owned by BDS, but their lower cost brand) offer a 2.5" lift kit for AT4/Trail Boss (so 4.5" of total lift) that lowers the front diff without coilover shocks - other do as well- it is more expensive way to go than RL( RL SST kit can be purchased from Tire Rack for $507 - Zone lift kit no shocks is $1,313), but install is a about the same, but given the better axel angles and no issues with auto 4wd this may be the best way to go.  I was able to step up the adjustable coilovers and it was expensive, but well worth the dollars - works great on and off road.

 

link:   https://zoneoffroad.com/search?fitment=1

Link: https://bds-suspension.com/product?ma=5&mo=1&ty=113&yr=2019-2021&kid=754F

 

Good luck finding good solution for you.  If you do a search there are a number of threads on this topic and lots of photos. 

 

READY LIFT - CV AXEL ANGLES - 2019 AT4 - SST KIT - STOCK 275/65/18 DURATRAC TIRES 

IMG_8840.thumb.JPG.a07a57722c6527f062a5d102ac0e46c3.JPG

 

2020 GMC AT4 - BDS COIL OVER 2.5" (4.5" OVERALL) LIFT KIT AXEL - DEAD LEVEL 

IMG_9550.thumb.JPG.1616557079f989c6d155e02b3dd61464.JPG

 

WHEEL QUESTION - DON'T KNOW ABOUT 20'S BUT FOR REF - THIS IS 275/65/18 ON METHOD NV 18X9  W 18MM OFFSET - ONLY ABOUT 5/8'S OF AN INCH CLEARANCE TO UCA

IMG_8828.thumb.JPG.4eea0193c4acb8c3ede59614fa68c684.JPG 

624408610_UCAGAP.thumb.JPG.8a14e5cc90fcd445ce8852cad644a3d4.JPG

 

 

Edited by Supercup

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