88’ Raingutter Ranger

[MTSuarez]

What antisquat numbers are you shooting for? I've got 2/3 your travel, but I'm in the 20-30% range and absolutely love it.

I’ve been seeing different views everywhere. I’m leaning toward a 70% with the ability to adjust down towards 60% and up to 80%.

 

[MTSuarez]

You have a ride height of 19", lowers are at 21" and uppers 27.35". Your u joint CL at the trans needs to be lower in the chassis to achieve less plunge. Your lowers are 60" and your upper links are 49.75" long? The pinion will need to rotate up (some) at droop or you'll have binding at the diff u joint and bad angles at the trans. I would focus on making the driveline happy first and then shoot for your AS numbers. Your CG location will be a guess at this point, which will make you AS numbers a guess as well. Another thing is to pay attention to is your axle location at full bump, too far up and the horizontal separation of the chassis tube layout gets weak (too close together).

I have almost the exact set up on my chassis table right now. 60" lowers, 51" uppers with 7" vertical separation at the frame and a ride height of 19". 15" up travel puts the tire (40's) at the top of the bedsides without touching on F150 Raptor glass.

I’ll mess around with changing the tranny location in space but it’s already slammed to the floor of the chassis (have both the engine and tranny 3D models imported into the file)

My CG is roughly 34” from the ground (measuring from the engine scan)

What changes in pinion angle are you seeing on your build? If our builds are that close I’m sure you’re seeing about the same.

 

[FasterNU]

36 fan coming in with all the good info.

We get slight driveline vibrations at full droop on all 4x trucks, I swear. Too much angle from the dangle.

Thats why I originally asked how your driveline would make it with those #'s. While the shocks would allow more travel, the driveline won't on ours for sure.

Curious on pinion angle changes too. I think mine was over 10* change (13 is in my mind for some reason) ... wish DR was still up so I could reference all those notes!

 

[MTSuarez]

36 fan coming in with all the good info.

We get slight driveline vibrations at full droop on all 4x trucks, I swear. Too much angle from the dangle.

Thats why I originally asked how your driveline would make it with those #'s. While the shocks would allow more travel, the driveline won't on ours for sure.

Curious on pinion angle changes too. I think mine was over 10* change (13 is in my mind for some reason) ... wish DR was still up so I could reference all those notes!

I’m sitting at 10° change over 30” of travel. I don’t think that’s terrible. Just trying to get a gauge where everyone else is since I’ve seen both setups with keeping the driveline “parallel” as well as keeping it pointed toward the transmission output.

 

[36Fan]

I dont have the numbers in front of me right now. If you try to keep it parallel throughout the travel you'll have to watch the trans u joint degrees, binding at the diff yoke and plunge. Mine stays pretty consistent but points upward towards the trans more at full droop and 1" of plunge. Motor/trans around 4-5 degrees down. A 16/18" shock combo with +3 ends puts the mounts up higher in the cab than I want with 15" of up travel, also interferes with the rear seat lay which is a pain. 13-14" up and 15-16" down is more realistic scenario.

 

[Pictafiedesign]

Do you have motor and trans sitting parallel to the ground? You can rotate your motor/trans up to 6 degrees imo (again up for debate) to lower your rear tail shaft and help your alignment and plunge of the driveline. I'm at 1.6" of plunge with 32" of travel.

 

[MTSuarez]

Do you have motor and trans sitting parallel to the ground? You can rotate your motor/trans up to 6 degrees imo (again up for debate) to lower your rear tail shaft and help your alignment and plunge of the driveline. I'm at 1.6" of plunge with 32" of travel.

It’s at 3° right now. I’m gonna see if angling it more affects any clearance on the chassis. Mostly maxed out going down with the transmission since it’s already sitting on the radius arm cross member.