Coasting RPM issue

[Tsalagi]

Finally got the engine running as smooth as silk for about a month after putting in 02 sensor, new plugs and points, air filter, oil change and 4 hole injectors. Driving in the North GA mountains last weekend and as I started down a grade, I noticed a drag in the momentum for about a second and then it released for about 5 seconds and then did it again. I "felt" the drag and then noticed a small decrease in RPM's every time it did it. I have checked the MAP sensor vacuum line and that isn't an issue. I searched the website and couldn't find a duplicate of this issue. Now I notice it every time I approach a red light or prepare to turn somewhere. Not sure where to look next. All the Cruiser tips have been completed and I am stumped. Could something be "grabbing" in the transmission?  Any help will be appreciated!

[Green Mesa XJ]

Not sure if it comes into play at all. Maybe torque converter locking and unlocking?


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[Jeep Driver]

1 hour ago, Green Mesa XJ said:

Not sure if it comes into play at all. Maybe torque converter locking and unlocking?


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Yep.

[Tsalagi]

Thank you. Since I felt something dragging I thought it could be transmission related. I will follow up on this and report back.

[Tsalagi]

Just realized I never got back to this topic. I replaced the torque converter and that solved the issue. I do still have a "whirring" sound that is coming from the drivetrain that I haven't been able to diagnose when it gets warmed up but as we know, this is a marathon not a sprint!