Dually rear end swap question

[bobbywalter]

8000 ppm is the general target.

 

[wellcraft]

No. It rotates at wheel speed. So none of the gearing matters. Only wheel diameter would change it.

The 108 tooth ring is the one that would mount to the carrier behind the ring gear. The ring gear in an 8.8” differential is 8.8” in diameter. So the tone ring is slightly smaller.

Ideally, you would buy one of those aftermarket setups. Then you would have a tone ring that mounts behind the flange in the pinion shaft outside the differential. Then thr sensor would be mounted close to it. The electronics package that comes with that would then be programmable to calculate the pulses you need to replicate the 108 tooth OEM ring and sensor.

For clarity, here is a view of the inside if the differential. On the left side, you see an edge view of the ring gear. To the left if that is the 108 tooth tone ring. Both are bolted to the carrier using the same bolts.View attachment 131322

Ford has 2 different rear axles for the Ranger:

7.5" => 102 tooth​

8.8" => 108 tooth​

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So, if you're going with picking up the pulses from the pinion snout or transmission output, you want a ring with. (Assuming Toy axle has 4.1 gears)

108/4.10 = 26.34 teeth (8.8") or 102/4.10 = 24.87 teeth....so somewhere between 25 and 26 teeth depending on how you want to manufacture it. Then, you don't need to worry about any additional electronics to get the pulse close enough for practical purposes.​

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For me, that was one of my shortcomings: I haven't worked with fiberglass. And when I was looking into this was made aware that there are varieties of fiberglass...

Part 2 of my personal challenge, I didn't want the "step" hanging out in the breeze = a bunch of cutting/fitting to make it look OEM. Again, the amount of body work I have done is very limited; and my wanting to have it look Concurs meant that I was asking someone to do it.
$1,000 US for the aftermarket fenders becomes $1,500 Cdn. + >$500 to get them shipped to Calgary, the fabrication to make them fit the existing regular box and $1,000 Cdn to get them painted to match the rest of the truck is where the cost escalated to $4k Cdn...

I now understand what you guys mean, I thought it needed to be the same o.d. as the tone ring inside the dif.

I have spent a few hours searching before replying to post my findings but I can't find anything that works at the flange of the rear differential, even by looking to add one at the output shaft from the 5r55e/4r55e ford transmission, being that is a ford transmission I thought it was going to be easy to find something.

 

[SenorNoob]

I can't see why a blank sprocket wouldn't work. Just have to precisely drill the holes so it's centered. Might have to mount the pickup to the side of it instead of overhead cause of the points on the sprocket. (Or ground down the points on the sprocket.)

Something like this:
Parts Unlimited CT467-26S Steel Rear Sprocket - 26T Natural

Edit: That would only have an outside diameter of 4.15in. Probably not large enough around to stick out beyond the flange on the differential.

Edit2: What about one of these: GPS Speed/ Compass Sender/ BIM
Transmission might act up in tunnels or parking garages...