Auto transmission slipping intermittently

[stevodevo]

Hi All,

Long time lurker here, but my warranty is ending soon, so I figure this might be a good place to get some second opinions for a few niggly issues Ford "can't replicate" before I end up stuck with a problem.

I have a MY20 Mustang GT, 10 speed auto, and pretty much for as long as I can remember, if I don't drive it for say, 3-5 days (give or take), when I stick it in reverse, it feels like I'm driving a manual with the clutch most of the way in. It does reverse, but really slowly, and increasing revs slightly doesn't make the car reverse any faster, but by the time I'm out of the garage and on the driveway it's all good. I daily drive my Mustang, so having it sit undriven for that long is really infriequent, and does make it a bit hard to replicate, but it definitely happens almost every time it sits that long.

I haven't owned an auto for over 30 years (yeah, yeah I know... so why start now when I finally get a Mustang haha), so I'm wondering if this is "normal" for an auto, or is it a sign of some underlying issue I should have rectified?


Thanks

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[bankyf]

Hi All,

Long time lurker here, but my warranty is ending soon, so I figure this might be a good place to get some second opinions for a few niggly issues Ford "can't replicate" before I end up stuck with a problem.

I have a MY20 Mustang GT, 10 speed auto, and pretty much for as long as I can remember, if I don't drive it for say, 3-5 days (give or take), when I stick it in reverse, it feels like I'm driving a manual with the clutch most of the way in. It does reverse, but really slowly, and increasing revs slightly doesn't make the car reverse any faster, but by the time I'm out of the garage and on the driveway it's all good. I daily drive my Mustang, so having it sit undriven for that long is really infriequent, and does make it a bit hard to replicate, but it definitely happens almost every time it sits that long.

I haven't owned an auto for over 30 years (yeah, yeah I know... so why start now when I finally get a Mustang haha), so I'm wondering if this is "normal" for an auto, or is it a sign of some underlying issue I should have rectified?


Thanks

This is absolutely a characteristic of the 10r80 transmission. Nothing to worry about. I would probably try to let the car warm up for another 15-20 seconds to avoid this, though.

 

[Lbj]

Make sure you transmission fluid is correct my car was almost a Quart low from the factory

 

[stevodevo]

Thanks for the responses. Fluid levels have always been good, so sounds like it's nothing to worry about.

 

[skinnyb]

My F150 did this (Same 10R80) especially when it was really cold outside. Drove it for 100K miles and didn't have many issues other than that. My Mustang does hesitate to go in gear, both reverse and when switching to drive but once it engages, it goes fine. I did have the dealer check my fluid and did a software update a couple months ago. About the same now for me.

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