2016 LR4 Transmission Fault

[Mth12]

I have a 2016 lr4 HSE lux w HD package and 120k mi, bought new-to-me at 95k from genuine LR dealer. Recently completed full cooling system overhaul at local shop. Haven't put more than 50mi on since when last night i was coming down a hill to stop light and when I hit accelerator from stop, vehicle throws transmission fault and leaves me stranded in middle of intersection (I could select R, N, D on dial and would just flash indefinitely and remain in Park). Tried several power cycles, battery disconnects but fault persists. Called the local shop and they didn't have any immediate thoughts though I do still plan to tow it over next week.

I do have vague memory some minor hesitation when accelerating from stop like at a stop light just before failure but certainly nothing more extensive.

Searching online, i am seeing a range from blown fuses (checked these and all look good) to replacing the dial, to complete TCM/refurb trans R&R.

Curious if anyone has seen similar or has thoughts for how to begin triage.

 

[itsaguything]

Probably something simple and electronic in nature. Difficult to tell without codes, of course.
While you're in there schedule a transmission service.

 

[Mth12]

Well I got the scanner on it. P177a transmission friction element - A or B. Anyone see this before? not liking the 'check trans fluid level and quality, if fault persists install new automatic transmission' diagnosis....

 

[itsaguything]

Sounds like you burned out the clutches or braking elements... how did you do that?
Four wheeling it in Automatic mode? Not changing the fluid and filter?

 

[Nechaken]

Sounds like you burned out the clutches or braking elements... how did you do that?
Four wheeling it in Automatic mode? Not changing the fluid and filter?

Curious -- why would 4 wheeling in auto be a problem? Trans would just stay in 1st the majority of the time ?

 

[itsaguything]

I'm not suggesting any one situation on its own would cause a clutch failure on an automatic transmission.
But undue, high volume load on a transmission, over heating, etc. without transmission service wouldn't be good.

 

[Mth12]

Hardly done any wheeling whatsoever. Only owned it for 25k miles so far so didnt even think to do trans service at any point...

are these clutches rebuildable or are we looking at complete trans swap?

 

[itsaguything]

have a ZF authorized transmission shop look at it.