2005 V8 LR3. Approx 150,000 miles.
towing camping trailer last weekend. Accelerating from a stop and felt a quick shudder in 1st gear for maybe 2 secs. Nothing else for rest of trip.
No tranny related codes currently showing.

question: if something like my torque converter was going bad would I have a CEL and code for that?
is there something I can check and monitor with my gap tool on transmission?

maybe it was nothing and I’m panicking. Thanks for any help in advance.

Transmission fluid was professionally flushed and replaced two years ago.