Replacement Bearings and Seals for 2007 Montana 3700RL
Updated 04/09/2026 | Published 02/14/2026
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Question:
Good morning, I have a 2007 Montana 3700RL that I recently acquired and need to know the bearings and seals for my axles. The vin number is 4YDF3402X74700425 with 6K axles. If you can point me in the right direction I would be appreciative.
asked by: Braxton R
Expert Reply:
Hey Braxton! Since you have 6k axles I can tell you you either need Bearing Kit # BK3-100 (2.25" inner diameter grease seal) or # BK3-110 (2.125" ID grease seal). For the Timken you looked at it is either the # TMK42VR (2.25") or # TMK82VR (2.125").
I don't have a way to look this up using your VIN, but if you can give me the manufacturer and serial number off of your axle tag I can verify the right grease seal size. You could also pull the hubs and measure.
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Braxton R.
4/9/2026
Good afternoon, Found my axle number Dexter axle 112401435 8k axle max Could you find the axle bearings and seals along with the whole new hub and brake assemble. Thank you.
Robin H.
4/9/2026
Product Page this Question was Asked From
Timken Bearing Kit 15123/ 25580 Bearings, 15245/25520 Races, 412920 Seal
- Trailer Bearings Races Seals Caps
- Bearings
- Bearing Kits
- Standard Bearings
- Bearing 15123 and 25580
- Race 25520 and 15245
- 6000 lbs Axle
- Timken
more information >
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Paul
2/19/2026
I find it best to pull one apart and get the correct numbers off of the inner and outer bearings and races.