10R80 Issue
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5th Wheeling
Joined: Feb 2019
Posts: 28
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10R80 Issue
Haven’t been here in a while but thought I would pass along an issue I had with my ‘18 5L with the 10 speed automatic.
I have had an incredible time with this truck. We drove it off the lot brand new! In 2025 I passed 123K miles. Now is when the fun begins. Back in the fall I had an issue with the Variable Valve Timing, but that was an easy fix. Shortly after that however I developed a shudder from the transmission.
And of course if wasn’t repairable. So, $7,500.00 later, I’ve got a new transmission. My question for those of you that have replaced your 10R80, have you been happy with the truck after that swap? Does it perform well enough for you not to consider purchasing a new truck? I do tow a pontoon boat in the warmer months, but it’s only like 3-4 times a year. Other than that, this vehicle isn’t used for crazy hard labor. In fact, IM STILL ON THE ORIGINAL SET OF BRAKES. Seriously, my brakes outlasted my transmission.
Thanks for any insight into my dilemma.
I have had an incredible time with this truck. We drove it off the lot brand new! In 2025 I passed 123K miles. Now is when the fun begins. Back in the fall I had an issue with the Variable Valve Timing, but that was an easy fix. Shortly after that however I developed a shudder from the transmission.
And of course if wasn’t repairable. So, $7,500.00 later, I’ve got a new transmission. My question for those of you that have replaced your 10R80, have you been happy with the truck after that swap? Does it perform well enough for you not to consider purchasing a new truck? I do tow a pontoon boat in the warmer months, but it’s only like 3-4 times a year. Other than that, this vehicle isn’t used for crazy hard labor. In fact, IM STILL ON THE ORIGINAL SET OF BRAKES. Seriously, my brakes outlasted my transmission.
Thanks for any insight into my dilemma.
Fleet Mechanic
Joined: Jan 2020
Posts: 1,370
Likes: 417
A recent repair, IMO, they finally have fixed it. If you are happy with it, I'd think you were good for a while. I've pondered the same, always comes back to the roll of the dice. My 2020 has been flawless, but I'm only at 75k. I haven't dabbled enough in the new truck forums to get a vibe of quality, ya hate to trade a solid truck for a new line of potential troubles. I would (if you haven't already) have the front / rear diff fluids exchanged.
Logistics Pro
Joined: Jun 2017
Posts: 3,986
Likes: 515
From: Edmond, OK
I've kept my eye on this forum to see if a 10R80 repair has surfaced that is legitimate. I haven't seen one yet.
You might ask the shop if that price included an updated CDF drum. If not, you might want to consider getting rid of your truck ASAP.
After a
stealership replaced the 10R80 in the 20 F150 I owned it worked well for 7 months and 18k miles. The transmission started clunking into gear again so I got rid of the truck.
https://www.ford-trucks.com/forums/1...he-dealer.html
You might ask the shop if that price included an updated CDF drum. If not, you might want to consider getting rid of your truck ASAP.
After a
stealership replaced the 10R80 in the 20 F150 I owned it worked well for 7 months and 18k miles. The transmission started clunking into gear again so I got rid of the truck.https://www.ford-trucks.com/forums/1...he-dealer.html
Thread Starter
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5th Wheeling
Joined: Feb 2019
Posts: 28
Likes: 0
I've kept my eye on this forum to see if a 10R80 repair has surfaced that is legitimate. I haven't seen one yet.
You might ask the shop if that price included an updated CDF drum. If not, you might want to consider getting rid of your truck ASAP.
After a stealership replaced the 10R80 in the 20 F150 I owned it worked well for 7 months and 18k miles. The transmission started clunking into gear again so I got rid of the truck.
https://www.ford-trucks.com/forums/1...he-dealer.html
You might ask the shop if that price included an updated CDF drum. If not, you might want to consider getting rid of your truck ASAP.
After a
stealership replaced the 10R80 in the 20 F150 I owned it worked well for 7 months and 18k miles. The transmission started clunking into gear again so I got rid of the truck.https://www.ford-trucks.com/forums/1...he-dealer.html
Logistics Pro
Joined: Jun 2017
Posts: 3,986
Likes: 515
From: Edmond, OK
I hear that.
Be aware that there isn't a traditional transmission dipstick either, so you can't easily remove the dipstick to check the condition of the fluid. There is a small dipstick on the passenger's side of the transmission, but it isn't marked like an old style transmission dipstick. You have to follow a service procedure to get the fluid level right.
Here's a thread with info on the 10R140 dipstick (big brother to the 10R80, post#16 for a downloadable file).
https://www.ford-trucks.com/forums/1...d-fluid-2.html
Be aware that there isn't a traditional transmission dipstick either, so you can't easily remove the dipstick to check the condition of the fluid. There is a small dipstick on the passenger's side of the transmission, but it isn't marked like an old style transmission dipstick. You have to follow a service procedure to get the fluid level right.
Here's a thread with info on the 10R140 dipstick (big brother to the 10R80, post#16 for a downloadable file).
https://www.ford-trucks.com/forums/1...d-fluid-2.html
Last edited by Olds64; Jan 15, 2026 at 07:06 AM.
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