i have flat towed mine a few times and thankfully have not had an issue. as others said it seems pointed towards the 4A xfr case. did you run a charging line? biggest culprit also seems to be pointed to when battery voltage falls low. before i flat tow i charge the battery and i run a charging...
i have the rci rack on the 4 door. i used both rci’s and JCR’s options to prevent sagging in the back, had an initial rattle on the front fairing that i adjusted and tightened and have not had issues for over 6 months now. have had it loaded several times too.
and Dakota’s website clearly states “This is version 2.0 of our original 12V 18Ah battery. Same size and price but 2Ah more capacity, lighter weight, and now includes a voltmeter and USB charging “
https://dakotalithium.com/product/dakota-lithium-12v-12ah-20-amp-hour-lifepo4-iron-phosphate-battery/
the AAL setup used the 18AH dakota cells, while dakatoa doesn’t make those, they state their 20AH as being in the same size and form factor, meaning you could use their setup and have 80AH. i’m curious if you used the dv8 trunk replacement if that would allow for larger cells
i’m running the fp performance cover on the rear, with amsoil 75w-140 as recommended by Dana for both its differentials, no issues, no real change in mileage
the JKS kit will keep you from rubbing lock to lock for steering as others mention, to prevent rubbing when off roading you have to do one or a combination of things: 1. limit up travel 2. body lift 3. aftermarket fenders (inner/outer) such as adv fiberglass
based on the fact that the Hoss 3.0s fox shocks appear to use the same springs as the bilsteins on the hoss 2.0 (sasquatch) based off my part no search, and the fact that eibachs also fit both, it’s a good bet the Dobinsons also fit, they just haven’t fitted them to say they do on their website...
i have only gotten the issue when it’s relatively cold out. above 60 and never comes in, below 40 and it’s pretty much guaranteed to come in upon startup. between it’s a coin toss. so for me seems to be temperature dependant. tis a 23
Interestingly enough when you look at Dana's spec for the Dana 44 M220 rear Axle and Dana 35/44 (M190/M210) front axles they specify 75W-140 as compare to Ford's 80W-90/75W-85 Front/Rear recommendations
i happened to grab the part numbers off the coil springs in the rear on the fox shocks while i was installing a lower skid plate. matching to the ford parts catalog, they are the same springs used on the bilstein shocks. so by that and the previous poster, the eibach springs will fit the fox...