Best in 7 days
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
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Description
Spartan Locker AMC 20 Differential W/29 Spline Axles W/Heavy Duty Cross Pin ShaftThe Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. The Spartan locker design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap! Fits AMC Model 20 Made from 9310 steel for added strength Replaces the spiders in a standard carrier case 1 year warranty against Manufacturer defects
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.5 ★★★★★
Based on 661 reviews
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Product Reviews
★★★★★ 5
Great product. So cute
So pleased. Helped my 11 week puppy sleep in his bed without crying. Would like smaller ones for Yorkies.
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Reviewed in the United States on October 13, 2025
★★★★★ 5
Its amazing
My dog calms down when I put her plush toy near her; when I hear the sound of its heartbeat, I know she's very still.
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Reviewed in the United States on March 6, 2026
★★★★★ 2
Dogs can open zipper and pull out all the stuffing easily
Not great for a chewer. My 15 week puppy unzipped it and pulled all of the stuffing out. The stuffing is just loose once you unzip it, there isnt a cloth pocket for the battery pack. She also ate the rectangle hand hold part of the zipper. Really sad this didn't work out. I do feel like it helped her settle a little but just wasn't safe for her.
Other than that, it appeared as pictured and worked properly. Also worth noting, the heart beat is LOUD when you put batteries in. I don't know if it calms over time but it was kind of intense.
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Reviewed in the United States on June 7, 2025
★★★★★ 3
Zipper is a problem
The first set we received the zipper separated. They were quickly replaced. The zipper tab is very large and our puppy is able to pull it down and pull out all the stuffing. Otherwise it worked to help comfort her until she found the zipper.
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Reviewed in the United States on March 20, 2025
★★★★★ 5
Lifesaver
Perfect for neonatal puppies and kittens
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Reviewed in the United States on August 29, 2025
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