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Honestly, my M1123's gearing, motor, transmission combo works great! I don't have the turbo, and like I said, wind gusts when pushing the higher speeds can be felt. But it really doesn't bother me. I tend to drive in the 65 mph range more, and the engine sounds and feels nice in this range. Has...

Above 80 mph, power really IS needed because of the wind resistance. Above 70 mph it is noticable.

Basic engine design for these motors means they have a more limited amount of boost because the heads tend to 'lift', then you get the blown head gaskets. How much difference with ARP head bolts, etc. not sure. I know you can make more power, but at a fairly high price. If you want to push those...

Fastest for gear ratios, yes. But needs the overdrive transmission to take advantage of that gearing. BTW, for cost, I meant to just get take out differentials, ie,. surplus. But if you have an ECV up truck, then your diffs/brakes are better. Finding 2.56 ring and pinion sets will not be easy...

Sorry, I have always used those interchangeably. Still not right though...

Yes, Dana 20 differentials, just like in the Jeeps. And yes, doing a ring and pinion swap, properly setup, is the way to change to a number of different gears. Thing is, getting the low numeric gear ratios are not common. Most offerings are 3.54 or up. Easiest answer is to swap the differential...

They are only 4 speeds, you are feeling the torque converter locking up to make it feel like another gear. Transmissions 3rd gear is 1:1, 4th gear is .75:1 So .75 to 1 is the overdrive gear in the 4 speed transmissions (4L80E) in the A2 and up trucks.

Yes, putting a turbo 6.5 with 4speed in a A0-A1 truck would have the highest top speed. Or just swapping the A0-A1 diffs into a turbo truck, same difference, gearing wise.

He could have, but I doubt it. And to put all the numbers for gearing. For the differentials themselves. A0-A1 have 2:56 A2’s have 2:73 (4 spd, 65. NA) ECV on up, 3:08 (4 spd, 65. Turbo) Geared Portal hubs are 1.92:1 Transmissions 3rd gear is 1:1, 4th gear is .75:1 Final drive "axle"...

Exactly. The 3speed setups, the A0, have the best diff gears, but lack the overdrive in the transmission. If you wanted the fastest top speed, swap the A0 gears/diffs into a ECV/REV turbo truck.

The 6.5 NA motor has the best gearing for higher speeds. Turbo motor is more gear limited for top speed. Like I said, no problems cruising between 80 to 85 mph. Btw, I normally cruise at 65 to 70 mph on the freeway in both M1123s with no issue.

Ok, well. At our yearly rally, someone showed up, random civilian, and took off pretty quick under suspicious terms (ie. not acknowledging any of us waving at them, etc.) The only vehicle I had to chase (there were others that went after,) was my wife's M1123. We were trailing them, doing over...

For those looking for tire shops to balance, etc. these tires, look into commercial truck tire shops. They have equipment to spin up the large/heavy tires. The light duty stuff in small shops really are not made to handle the heavier combos like we have. I almost went with Balancemasters, but I...

I have E rated Bajas on 24 bolts with runflats. 2019 date code, new tires. I have the centramatics installed, and I can easily cruise at 70+ without issue (been over 80 mph and still felt fine.)