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When working properly, the 68RFE and Aisin AS69RC are a great transmission. Unfortunately, though, when things go bad, they go very bad. The 68RFE especially has been plagued with a high failure rate that many attribute to the fact the converter in this transmission never goes into a full lockup, which creates excessive heat, and we all know what heat does to a transmission. Interestingly enough, this easy to install bypass valve delete can keep your transmission temperatures in check in certain environments, potentially saving you a heap of money.
HOW IT WORKS: Ram decided to incorporate a transmission cooler bypass valve into the cooling system of the 68RFE and Aisin AS69RC that bypasses the transmission cooler during cold operation. The intent is to force the transmission to warm up faster. The reality is this bypass valve leaks and sticks in the bypass position in almost every case, causing the transmission cooler flow to bypass the trans cooler, essentially eliminating the trans cooler from the circuit. This causes severe damage to the transmission over time because it is not being adequately cooled by the transmission cooler. The ATS cooler block replaces the faulty design, eliminating the bypass valve and ensures 100% of the trans cooler flow is forced through the trans cooler. In every case this substantially reduces transmission temperatures.
- ManufacturerATS Diesel Performance
- ATS Thermal Bypass
- Cooler Block Clamp Plate
- ATS 68RFE Billet Aluminum Filter Coupler
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