Welcome to Sunline Owners Club! Glad you found us.
I'll see if I can help. I do not have your exact model but had one similar prior to our current larger camper.
I looked up in the 1994 brochure, (you have access to this too, look at the top of the forum for a "FILES" tab, click it and look in the brochure section for your camper, download a copy) And it lists a 94, T2670 as having a 7,000# GVWR.
Odds are high, you have qty, 2, 3,500# axles. They would have 10" x 2 1/4" brakes and 5 lug wheels.
You might have Dexter or Alko axles. While the brake parts are not exactly interchangeable the brake drums are.
Here is the Dexter Axle service manual. See page 81 for the bearings sizes. (PDF page 82) Look under 10 x 2 1/4 brakes 5 bolt hub and the 3,500# (3.5K) axle. They give the Dexter part number and the generic part number of the bearing and race for the inner bearing and the outer bearing.
And here is the Alko, now owned by Dexter. PDF page 13 and 14 show the bearings for the 10" x 2 1/4 brakes on different lug stud bolt circles. But all the bearings are the same. In the Alko catalog they only give you the bearing number, the new races are pressed in the brake drum. But the bearings are the same as the Dexters above I linked.
You can go to an Auto Parts store with the industry standard cup and bearing cone part numbers and get these bearings. I have bought them at NAPA autoparts.
You will need the grease seal too. Make sure you get the double seal with the garter spring inside.
And if you go back to that RV dealer and tell them you have a 3,500# Dexter axle with 10 x 21/4" brakes, he can look them up too. Or give him the numbers out of the Dexter book. Most RV dealers who where never Sunline dealers do not know what we have, but if you tell them the axle mfg and size, they can help many times.
This post may help on your rebuild. This is on my 2004 T2499 I had which has the same axle as yours. I never made it to creating this post on Sunline Club. Annual Brake Inspection and Axle Re - Lube (Pic's)
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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