You make some valid points, but they are out of context here. Just ake a look Ford's axle ratio charts for their F250 - F450 trucks. If one wants the higher tow rating, the ratio will climb. There are plenty of 4.30 and 4.88 options. A big axle with a big ratio is the most durable choice here, plus it lessens the load on all upstream components, and I'll touch on those components later.
I am aware some folks have smoked the pinion/spider shaft. Calling it common is stretching things, but it does and can happen. 400 ft/lbs of torque with a 4.30 ratio doesn't help here. :ylsmoke: IMO many of these blown pinion shafts are from abuse, mainly burnouts.... nothing smokes these faster than plenty of one wheel peels, or better yet, continually trying to do a burnout with the traction control shuttling the torque back and forth using the brakes. I'm willing to bet any of the big three trucks with the big engine, larger rear end ratio, and 2 pin spider will experience this with more frequency. Fortunately, for the smaller "axled" trucks, they likely have an option 4 pin, LSD, or locker option. If Toyota had installed the 4 pin spider, which was shown in the brochure, this would be a non issue. Fail on Toyota for saving cash and installing the 2 pin, but it's a non issue for most folks.
Toyota also specs 75W85 gear oil... this thin lube crap for mileage is nice and all, but the proven weights will work fine for me. Fail on the lube spec.
The drop out chunk weighs 108lbs.
Carrier bearings 92mm (3.62") x 55mm (2.17") x 20.5mm (.80").
Pinion bearing, front 81mm (3.20") x 36mm (1.45") x 21mm (.84")
Pinion bearing, rear 104mm(4.10") x 44.5 (1.75") x 27mm (1.06)
it will be nice if we can get the bearing sizes for the other trucks. Materials and specs for those materials would also be nice, but I doubt we'll find much other than normal generic info. The shaft is 35 spline and 1.37" OD at those splines. The shaft is 1.75" at it largest point, just behind the gear head. Having a 10.5" ring gear, flex here is not a problem. Ring gear is over 1" thick at the root, and those roots are shot peened.
Housing. Fabricated from .23" steel, tube is 3.43".
Axle shafts, 1.457 36 spline, 1.95" at wheel.
Rear wheel bearings. Sealed dual row roller. 89mm (this is outer diameter of the lip seal), 49mm x 55mm wide. We'll talk about these later....
I am aware some folks have smoked the pinion/spider shaft. Calling it common is stretching things, but it does and can happen. 400 ft/lbs of torque with a 4.30 ratio doesn't help here. :ylsmoke: IMO many of these blown pinion shafts are from abuse, mainly burnouts.... nothing smokes these faster than plenty of one wheel peels, or better yet, continually trying to do a burnout with the traction control shuttling the torque back and forth using the brakes. I'm willing to bet any of the big three trucks with the big engine, larger rear end ratio, and 2 pin spider will experience this with more frequency. Fortunately, for the smaller "axled" trucks, they likely have an option 4 pin, LSD, or locker option. If Toyota had installed the 4 pin spider, which was shown in the brochure, this would be a non issue. Fail on Toyota for saving cash and installing the 2 pin, but it's a non issue for most folks.
Toyota also specs 75W85 gear oil... this thin lube crap for mileage is nice and all, but the proven weights will work fine for me. Fail on the lube spec.
The drop out chunk weighs 108lbs.
Carrier bearings 92mm (3.62") x 55mm (2.17") x 20.5mm (.80").
Pinion bearing, front 81mm (3.20") x 36mm (1.45") x 21mm (.84")
Pinion bearing, rear 104mm(4.10") x 44.5 (1.75") x 27mm (1.06)
it will be nice if we can get the bearing sizes for the other trucks. Materials and specs for those materials would also be nice, but I doubt we'll find much other than normal generic info. The shaft is 35 spline and 1.37" OD at those splines. The shaft is 1.75" at it largest point, just behind the gear head. Having a 10.5" ring gear, flex here is not a problem. Ring gear is over 1" thick at the root, and those roots are shot peened.
Housing. Fabricated from .23" steel, tube is 3.43".
Axle shafts, 1.457 36 spline, 1.95" at wheel.
Rear wheel bearings. Sealed dual row roller. 89mm (this is outer diameter of the lip seal), 49mm x 55mm wide. We'll talk about these later....
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