I took a few measurements before the install...
I am running the 3” version of the Old Man Emu Nitro chrged shock lift.
I measured a rear lift height of 2.5”. That is 24” from fender edge to wheel center. A stock t4r measures in at 21.5”. So ideally, you would divide the lift height by half and add that amount, 1-1/4” in my case, to the link length. This will put the sway bar position back flat like it was originally built, but theres one problem with that. The lower arm is directly under the sway link, so going too low may cause contact when stuffing a rear wheel offroad. Thats the bad news. The good news is that it adds, theoretically, 2.5” additional droop when flexing offroad. So, instead of the droop being limited by the sway bar, it will allow full shock extension.
In a nutshell, I did not add 1 1/4 “ in length. I only added 1”, as I dont want to see any contact offroad with the lower arm. I may do more adjusting once I am able to see whats going on when fully stuffed, but thats where I landed for now, and I have 2” between the lower arm and link end. The stock link is 7” from end to center of the bottom knuckle. I set mine at 8”. The install was done in about an hour, without removing the wheels or jacking the vehicle up. Easy peesy.
Tools required:
17mm 3/8 drive ratchet
17mm ratcheting box end wrench
12mm ratcheting wrench
13mm ratcheting wrench
Channel lock pliers
Measuring tape
Photos:
The Dobinsons Link
Factory link before removal. You can see the extreme upward angle of the sway bar end and how it is pulling the link toward the axle.
Side by side...Dobinsons Link at top
Stock link = 7” length
Dobinsons adjusted to 8”
It looked entirely possible for this brake cable to contact the sway bar link end on uptravel, so I bent it a out farther to the side.
Dobinsons installation complete. Not a perfectly flat bar end, but it will get a bit flatter when loaded and is much better than the position is was in with stock link.
EDIT TO UPDATE:
I had an opportunity today to fully flex the rear suspension. Fully flexed there is a good 3/4” or 1” clearance between the lower arm and link end so I will be good to go with extending the links the 1/4” additional length that I need.