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Description
RT Off-Road - Steel Unpainted Ring & Pinion - D30JK488Overview: Ring & Pinion 4. 88 Gear Ratio 24 Spline Pinion Fits all OE or OE Replacement Differential Cases Direct Replacement Crown supports its entire line with a 12 month warranty Application: Year Make Model Submodel Engine Size 2007 2011 Jeep Wrangler 2012 2017 Jeep Wrangler Unlimited Sport 2012 2017 Jeep Wrangler Unlimited Sahara 2016 Jeep Wrangler Unlimited Sport S 2012 2017 Jeep Wrangler Sahara 2016 Jeep Wrangler 75th Anniversary 2012 2017 Jeep
Overview:
Ring & Pinion- 4.88 Gear Ratio
- 24 Spline Pinion
- Fits all OE or OE Replacement Differential Cases
- Direct Replacement
- Crown supports its entire line with a 12-month warranty
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 2007 - 2011 | Jeep | Wrangler | ||
| 2012 - 2017 | Jeep | Wrangler | Unlimited Sport | |
| 2012 - 2017 | Jeep | Wrangler | Unlimited Sahara | |
| 2016 | Jeep | Wrangler | Unlimited Sport S | |
| 2012 - 2017 | Jeep | Wrangler | Sahara | |
| 2016 | Jeep | Wrangler | 75th Anniversary | |
| 2012 - 2017 | Jeep | Wrangler | Sport | |
| 2018 | Jeep | Wrangler JK | Sahara | |
| 2016 | Jeep | Wrangler | Unlimited 75th Anniversary | |
| 2018 | Jeep | Wrangler JK | Unlimited Sahara | |
| 2018 | Jeep | Wrangler JK | Unlimited Sport | |
| 2016 | Jeep | Wrangler | Sport S | |
| 2018 | Jeep | Wrangler JK | Sport |
Specs:
| Axle | Dana 30 |
|---|---|
| Gear Ratio | 4.88 |
Additional Information:
| SKU Number : | D30JK488 |
|---|---|
| Brand : | Crown RT Off-Road |
| UPC : | 849603020509 |
| Part Type : | Ring & Pinion |
| Dimension : | 8.00(L) X 7.50(W) X 4.50(H) |
| Weight : | 9.40 lbs. |
| Color : | Unpainted |
| Material/Finish : | Steel |
| Sold AS : | Each |
|---|---|
| Quantity Required : | 1 |
| Warranty : | 12 Month |
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
4.2 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Perfect for whatever activity!
Size: Large, Color: B004
I bought these specifically for my postpartum journey, and I still wear them. They are so comfy & a perfect length.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 5
Worth Spending
Size: X-Large, Color: B004
Super comfortable....
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 5
Warm and comfy thermal wear
Size: Small, Color: Navy
They are very soft, don't ride up. Clothes do not stick to them like other thermals do. The fit is perfect. They are warm and comfy. The quality is good, too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2026
★★★★★ 5
Comfortable, well made, washes well, would buy again
Size: Medium, Color: Light Grey
I bought these as a gift for my friend who lives in cold country and she says she loves them and they wash-and-wear well and are well made. Also very warm. Very comfortable and the fit is right on size. I would order them again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026
★★★★★ 5
Perfect
Size: Large, Color: Navy
Oooooo these are so nice and soft and so warm! I am a nurse and work in an old hospital that is getting remodeled and there have been days we haven’t had heat and I have been very happy that I purchased these. My scrubs glide very nicely over these and don’t add any bulk. Definitely worth every penny! The fit is spot on and they wash up really well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025
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