RevMax 68RFE-929AA Transmission Cooler Thermal Bypass Valve Upgrade

PART# 68RFE-929AA | SKU RM68RFE-929AA
★★★★★ ★★★★★ 2.8 (5 Reviews)

Vehicle Fitment For:
2013-2018 Ram with 6.7L Cummins Engine (68RFE & AS69RC Transmission)

See full application list below
$109.00

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Description

The RevMax 68RFE-929AA Transmission Cooler Thermal Bypass Valve Upgrade from XDP is designed to keep the transmission cool in your 2013-2018 Ram 6.7L Diesel 68RFE / AS69RC. The 2013-2018 Ram trucks have been known to run hotter than some of their earlier predecessors. The factory thermal bypass was designed with a large restriction which reduces cooler flow by up to 87%. In addition, there have been reports of melted down transmissions due to the bypass valve sticking in the cold closed position.

The completely re-engineered, RevMax Transmission Cooler Thermostatic Bypass Upgrade completely fixes all these complaints. No other bypass offers full unrestricted flow like the RevMax version does. Constructed from Billet 6061 Aluminum, this bypass features RevMax’s ZeroStat Technology, completely removing the orifice restriction for full cooler flow all the time. This equates to lower operating temperatures and longer transmission life. Removing the thermal bypass valve and the orifice bottleneck located in the factory part, you can expect up to an 87% increase in cooler flow. In addition, removing the thermal controlled bypass valve eliminates any chance of failure which can cause a lack of cooler flow and complete transmission destruction.

Instead of closing off cooler flow when the transmission is cold and making your transmission generate unneeded heat that is hard to shed later; this bypass allows your cooler to immediately begin cooling your transmission and not waiting for it to get hot, just to try to cool it later. Integral aluminum cooling fins are also incorporated to aid in passive cooling of the block and fluid. Best of all, you can now properly flush your cooler lines without the aid of a hot flush machine. Typically, a hot flush machine is required to get the system hot enough to open up the bypass valve up. With the RevMax bypass upgrade you can use room temperature fluid to clean out your cooler anytime you wish without any special tools! The RevMax 68RFE / AS69RC Transmission Cooler Thermostatic Bypass Upgrade is a direct bolt-on replacement. No lines are cut, nothing is altered. Simply disconnect your old lines and install them into this new bypass.


Features:
  • Direct Bolt-On InstallationUp To 87% Increase In Cooler Flow
  • Billet 6061 Aluminum Construction
  • For 68RFE & Aisin AS69RC Transmissions
  • Aluminum Cooling Fins Integrated To Aid In Cooling
  • Allows For Room Temp Fluid Trans Cooler Line Flush

Reviews For RevMax 68RFE-929AA

Overall Rating
2.8/5
5 Reviews
Rating Snapshot
5 ★
2
4 ★
0
3 ★
0
2 ★
1
1 ★
2
Verified Buyer
★★★★★ ★★★★★
Leak
Robert (Hawaii) | April 13th, 2026
My mechanic installed it and when he went for a test drive it started leaking. When he got back to his shop he removed and reinstalled the original one and it worked fine no leaks. He didn’t like the quality and asked why I bought this particular one and I was wondering if this one is just a one time issue or something else.
Verified Buyer
★★★★★ ★★★★★
Great product
JW (Texas) | April 9th, 2025
These bad reviews are meaningless. This is one fantastic product. A must have for all my in house transmission builds. Worried about your 68 temps? Get the revmax block!
Verified Buyer
★★★★★ ★★★★★
Revmax thermal bypass
Cody (Va) | December 10th, 2023
Recommend upgrade over stock. Mine wasn't doing what it was suppose to causing my trans temp to climb to almost 200 degrees empty. After installing the revmax I'm running in the neiborhood of 120-150 depending on driving conditions
 
★★★★★ ★★★★★
Bad design
Scot (Oregon) | November 22nd, 2023
My face emblem that's on it faded an has an ugly corrosion that doesn’t come off no matter how hard I scrubbed it… Due to this I'm taking it off and getting a BD one and see how that goes.
Verified Buyer
★★★★★ ★★★★★
Could be better
Josh (Texas) | September 18th, 2023
The overall appearance/evenness/machining of the piece is good. The bad part is how the part goes in since the transmission side of it is stepped. This causes the part to be difficult to install and it puts a constant side load on the hard lines on that side. There are new O-rings for the side that goes to and returns from the cooler but no new O-rings for the transmission side.
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Frequently Asked Questions

Does this come with everything needed to install?
Yes, the RevMax 68RFE-929AA Transmission Cooler Thermal Bypass Valve Upgrade includes everything you need for installation.
Will this work on a 2018 ram 6.4L Gas with 66rfe trans?
No, the RevMax 68RFE-929AA Transmission Cooler Thermal Bypass Valve Upgrade will only fit 68RFE application.
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More to Consider

Specifications For RevMax 68RFE-929AA

MPN 68RFE-929AA
SKU RM68RFE-929AA
GTIN 193564455864
ID 106102
Manufacturer Name RevMax
Shipping Weight 1.00 lb.
Shipping Length 5 in.
Shipping Width 5 in.
Shipping Height 3 in.
Fuel Type Diesel
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Cross Reference # 68RFE-929
Internal L3R5

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