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Transmission Thermal Bypass Valve Thermostat Cooler Upgrade Kit Compatible with 2013-2018 Ram 2500 3500 6.7L Cummins Diesel, Fits 68RFE and Aisin AS69RC
✅ In stock
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⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
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Price verified Nov 5, 2026 5:39 PM · Prices & availability subject to change
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💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
SPELAB
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓【VEHICLE COMPATIBILITY】Transmission thermal bypass valve upgrade kit compatible with 2013-2018 Ram 2500 and Ram 3500 trucks equipped with a 6.7L Cummins diesel engine and 68RFE or Aisin AS69RC transmission. Please verify the vehicle year, engine and transmission model before ordering.
✓【UPGRADE THE FACTORY-RESTRICTED FLOW】The factory thermal bypass valve can delay cooler circulation until the transmission fluid reaches a preset temperature, and its internal thermostat may stick or restrict flow over time. This upgraded open-flow design routes fluid through the transmission cooler immediately, helping reduce hot-fluid recirculation and support more consistent temperature control during towing, hauling and demanding driving conditions.
✓【EXTEND TRANSMISSION LIFE】Consistent fluid circulation through the transmission cooler helps manage excess heat, one of the major causes of accelerated fluid breakdown and component wear. By supporting more stable operating temperatures, this thermal bypass valve upgrade helps reduce heat stress on seals, clutches and other internal parts, promoting smoother operation and a longer transmission service life.
✓【BILLET ALUMINUM CONSTRUCTION】Machined from durable 6061 aluminum for dependable strength, corrosion resistance and long-term performance. Integrated cooling fins increase the housing surface area to assist with heat dissipation, while the precision-machined design supports a secure, leak-resistant fit.
✓【DIRECT REPLACEMENT & EASIER SERVICING】Designed as a direct replacement for the original transmission thermal bypass valve with no modification to the cooler lines required. Installation can be completed using common hand tools, and the open-flow design also makes room-temperature transmission cooler line flushing more convenient.
⚙️ Specifications
SPELAB
SPELAB
ASP-CS21-00139003
10.8 ounces
4.06 x 3.5 x 2.01 inches
ASP-CS21-00139003
Chrome
ASP-CS21-00139003
Manufacturer
SPELAB
Brand
SPELAB
Model
ASP-CS21-00139003
Item Weight
10.8 ounces
Package Dimensions
4.06 x 3.5 x 2.01 inches
Item model number
ASP-CS21-00139003
Exterior
Chrome