Are Dexter ABS Brakes For 3,500lb Axles The Same Fitment As 4,00lbs Axles?

Question

Question:

I have a tandem-axle camper with Dexter Tow Assist, need to check axle tag if it's 3,500 lbs and the other 4,400 lbs. Are the 10inch ABS brakes the same?

asked by: Brian

0

Expert Reply:

Good eye, Brian - both the 3.5K # DX73WR and 4.4K # DX83WR Tow Assist brakes are 10 inch x 2-1/4 inch, but they’re not interchangeable. The 3.5K version uses different mounting offsets and lighter components for smaller spindles, while the 4.4K version fits a heavier hub and uses a slightly different bearings.

If one axle tag shows 3,500 and the other 4,400, replace each axle with the matching rated assembly so the ABS sensors read correctly.

Are you planning to replace all four at once, or just service one axle right now?

expert reply by: Andrew N

0

Brian

11/3/2025

Thanks, Andrew. I pulled the tags again and looks like both axles are actually 3,500 lbs after all - must’ve misread the first one. Glad to know they match now. I’ll be ordering the #DX73WR assemblies for both axles.

Andrew N.

11/3/2025

@Brian Nice catch, Brian; that makes things much simpler. It would've been really strange if someone swapped in a different capacity axle, but I've seen it before! If both axles are confirmed 3.5K Dexter Tow Assist, then the # DX73WR assemblies are exactly what you need. They’ll bolt right up to the 4-bolt flange and plug into your existing ABS harnesses without any modifications. Since you’re doing both axles, that’ll keep the braking force and sensor readings balanced across the system. After you install them, power up the trailer and look for that solid green Tow Assist light - that’s your sign everything’s synced. Let me know how it goes once you’ve got them mounted! You'll need to follow the break in procedure of getting up to speed then breaking hard to a stop a few times then cool the brakes off, and they'll be broken in!

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Are Dexter ABS Brakes For 3,500lb Axles The Same Fitment As 4,00lbs Axles?

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