transmission

I have found a complete 8HP51 (15k miles) locally out of a 2021 GR Supra for 1k with torque converter and valve body. Seller claims car had a error on the dash and sometimes gets stuck in second gear (could it be first gear lockout?) and sometimes performed normally. No metal shavings and clean...

I recently took my 2020 Supra to a shop and had them tune my trans with XHP. Since then, I’ve gotten multiple codes: 420411 Gear ratio monitoring in fixed gear, clutch B, disrupted 421362 Gear ratio monitoring: all clutches implausible CDC10D Signal (status of transmission gear selection...

Very interesting situation here… Took my 2020 Supra 3.0 premium for a 3 hour drive up to a tuner that I was dying to work with (very well known and holds records) I came to him wanting a great tune, but made it clear that I am on stock turbo, stock trans, and stock motor. This tuner has tuned...

Posting again to see if I can get any help, 2021 Supra less than 9k miles Car wont allow me to rev out 1st or 2nd gear 1st gear goes to 10mph 2nd gear 20-23 mph Car is throwing •Chassis Stablilization (reduced driving stability) every other gear allows me pull to redline. car has...

I daily drive a 2023 B58 6-cylinder automatic Supra , bought brand new, has 4500 miles and put through the proper break-in period. Mods : MST INTAKE , and JB4 (map 1 and occasionally map 2 on weekends with 93 octane on both maps) Concern: (when in SPORT MODE) - I feel as though the down...

after flash, I've noticed driving the car in normal drive mode & automatic shift mode, the transmission shifts way too quickly.. I will be in 8th gear by 45-50MPH.. what causes this exactly

Sorry for the clickbait. Before people roast me, I am aware of how capable our platform is and how silly it can be to put an almost 30 year old engine into this car. HOWEVER, this is not my daily nor even a weekend car and I run an automotive and content brand full time. Undergoing a project...

Hello everyone, I recently noticed on the track that my transmission won't hold the gear in manual mode with the stick to the left. If it hits the redline, it will hesitate for a short bit and then violently send you into the next gear. (Video: stick to the left to select manual mode, car in...

First and foremost, hello all. I'm new to the forum, and sad this will be my first post! I've had my 2020 GR since early June 20'. 3750 miles on it, with some mild autocross in the mix. I was prepared to come show off my new custom exhaust, but a leak just derailed that project for a short bit...

Working on installing an exhaust, and I saw oil covering the trans oil sump. Is this normal? I was told it could be coming from the trans breather? should I retorque the bolts, clean, and check again later? or should I just take it to the dealer?

Did anyone have an issue with 4th gear getting stuck on automatic mode? I floored on high way and 4th gear was trying to transition to 5th but got stuck in high rpm so I let off, switched to manual and then became fine.Then same thing happened in 5th gear in manual mode and also auto mode. My...