Towing & Trailer SetupQuestionCommunity Starter

Need advice: Transmission temperature climbs on long grades

QuattroBuilderCommunity StarterOct 21, 20252023 Toyota 4Runner TRD ProPennsylvania
Normal temperatures around town, but towing uphill for 20–30 minutes pushes trans temp much higher. How do you decide whether the solution is speed/gear selection, added cooling, or simply less trailer? I'm in Pennsylvania. Trying to diagnose before I book a shop.
permalink

1 replies

EuroWrench18Community StarterCommunity StarterOct 22, 2025permalink
I'd keep this practical. Verify the cheap/easy branch on the 2023 Toyota 4Runner before a big repair or a big spend. Then you'll know the next fork. Post the numbers (or the code) and people can get more specific. Doing the boring step first on purpose.
Sign in to reply

Similar discussions