66rfe

  1. H

    2017 RAM 2500 6.4 Hemi shifter cable bushing

    Hey crew, I'm having an issue with the bushing that secures the column shifter linked cable. The other day -- following a Valvoline drive-through oil change (I know, I know...) --- the column shifter just seemed to be floating around at startup, no resistance, wouldn't go into gear, no...
  2. 17_America_76

    My 2018 6.4L Hemi 66RFE P0871 code "limp mode" fix

    Hey guys, new here. I just did a valve body and solenoid swap on my 2018 Ram 2500HD 6.4L with the 66RFE transmission at 88,*** miles. I will post links to the things I purchased at the very end. Last Sunday, 2/22/25, on the way back from the store my truck went into 4th gear "limp mode" while...
  3. H

    Torque converter lockup

    I'm wondering if there is a way to tell when the torque converter locks up? 2016 2500 6.4 66RFE. Is there a way with ALPHA or scan program to see when is locked and unlocked?
  4. chidychi

    Grey VB Solenoid Connector Pin Layout?

    Hey All, Changing my 66RFE Valve Body. Can anyone confirm if the grey connector on the solenoid has the same pin layout as the white one? I'm installing a CHR145 and the Sonnax instruction show the pin layout of the WHITE connector. I get nothing on pins 10 & 7 (overdrive). Just want to...
  5. W

    Transmission whining

    2018 power wagon Transmission whining on the highway when downshifting from either 6th to 5th or 5th to 4th. Sometimes jerks forward a bit. Had flush done hoping it would remedy the issue a bit but to no avail. Please, any more info or auggestions. I have read about the valve body issues and...
  6. PowaaaWagoon

    66RFE Sonnax Thermal Bypass Eliminator Kit

    Has anyone installed or heard of success when using the Sonnax thermal bypass eliminator kit? It just looks to be a cartridge valve swap while retaining the OEM body. I have warranty for another 3 years and don’t want to install an ATS or REV if that’s what they’ll use as a reason to void it...
    • PowaaaWagoon
    • Thread
    • 66rfe power wagon sonnax thermal bypass thermal bypass eliminator kit
    • Replies: 8
    • Forum: Heavy Duty
  7. PowaaaWagoon

    2018 PW DIY Upgrades and Fixes

    Recently purchased a 2018 Power Wagon in Flame Red with 99,8XX KM, now at 108,3XX KM. Thanks to this forum, I've managed to do lots of the recommended fixes or upgrades but wanted to document my progress so far and see what else I can add to my to-do list and maintenance routine. Engine oil...
  8. T

    66RFE options

    Hello Ram owners. Looking for some guidance. I have a 2015 Ram 2500 6.4 tradesman with 103k miles. When towing a trailer with my family's dirt bikes bake from the trails in NH home to CT my truck went into the dreaded limp mode. I was 150 miles from home so I had little options but to press on...
  9. Pktatum95

    66 rfe swap?

    I’ve got a 2017 Dodge Ram 3500 Reg cab dually 4x4 with 4.10 rearend. I hotshot for a livin, so I do a **** ton of driving. Currently truck has 240k and runnin like a top. At 93k engine went due to lifter lock up on cylinder #8, sent metal shavings through the whole engine, so got a brand new...
    • Pktatum95
    • Thread
    • 3500 dually 6 speed 6.4 hemi 66rfe aisin as66rc heavy duty transmission
    • Replies: 47
    • Forum: Heavy Duty
  10. L

    66RFE ISSUES

    New to ram!! Switched from Chevy. I have a 2017 5.7 2500 with a 66RFE. My stock torque converter is on its way out and I’m wanting to change it out with a more reliable one. Not sure which new converter to get. Any suggestions? ALSO, wondering what trans fluid I need (I’m suspecting just...
  11. Pktatum95

    Maximizing mpg 6.4 hemi

    Hey there. Have a question guys. Wanting some of yalls opinions. I have a 2017 RAM 3500 6.4 hemi DRW Reg cab with 4.10 and 66rfe. 209k on the clock. Bought it brand new with 8 miles on it (I put 6 of those test driving it) Lifter failure at 93k. New long block courtesy of FCA. No issues...
    • Pktatum95
    • Thread
    • 4.10 gears 4.56 6.4 hemi 66rfe heavy duty mpg towing
    • Replies: 44
    • Forum: Heavy Duty
  12. KrisK

    P0750 Code - Safe to Drive Home

    I’ve got quite a predicament. My 2017 Ram 2500 6.4 Hemi with 84k miles had the transmission go out about a month ago. Of course the powertrain warranty had expired, so I paid a good local shop to replace the transmission with a remanufactured Jasper 66RFE transmission. I picked it up two weeks...
    • KrisK
    • Thread
    • 66rfe hemi 6.4 p0750 transmission problems shifting
    • Replies: 7
    • Forum: Heavy Duty
  13. WY.Ram

    Tranny Slip..... still

    Hey all, I am hoping someone can advise before I have to take my beloved to the dealership for tranny work. 2016 Power Wagon w 58K miles on the clock. Only once have I ever had any significant problem and it was with the trans at approximately 40K miles -during interstate travel trans dropped...
  14. Drunken Hamster

    HD Guys, Is The 66RFE A Good Transmission Unlike The 65/545/45??

    Reason I'm asking is because if I do a trans swap in my 3rd gen as a part of a performance build, I WANT a TRUE 6-speed with decent ratios and the ability to hold some good power. From all of my reading and deductions thereof, a 66RFE seems like a good choice. Good gear spread, true 6 speed...
    • Drunken Hamster
    • Thread
    • 3rd gen ram 545rfe 66rfe performance build tranny trans swap transmission transmission swap
    • Replies: 38
    • Forum: Heavy Duty

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