I have a little over 56,000 on the FX and my radiator just went, it had a busted seal. So while I was at the dealer, I figured I'd get a transmission flush since I been wanting to do it for quite some time now. I was going to do it earlier but the dealer actually recommends a flush at 60,000. Anyway it's been about a week now and my transmission has been slipping a little now, which is not an issue I had before the flush. When I brake and stop the car bucks foward a little but with enough force that I actually feel like it's fighting the brakes. Also when a I do a rolling stop at a stop sign then get back on the accelerator the car responds normal then bucks foward slightly like the transmission is slipping. Is this normal after a flush? Has anyone else experienced this type of thing? Should I be concerned?
Transmission slipping after dealer flush
- Thread starter neva4self
- Start date
That honestly sounds like low fluid. I had similar issues when I was down on fluid. When you're braking, the transmission should go from gear to neutral and solenoids do that by moving fluid. If your fluid is low and pressure is low, then solenoids may act up causing the bucking. Same when you slow down then get back on the gas quickly, solenoids have to go from coasting to gear. If it was truly slipping, that would be at full throttle during shifts.
- Car
- 2007 FX35 AWD
You could probably test it yourself by opening the fill plugs. Clean the edges of the opened fill plug with a paper towel and with a level hand dip a cotton bud to see if it makes contact with the fluid level near the overflow line.
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- Car
- 2017 QX70S
- Name
- Andy
Ruben, you mean open the fill plug right? Open the drain plug will drain out the fluid.
The 2nd Gen still have the trans dip stick right? Start the car and let it warm up to operating temp. Shift the gear a couple of time into different gear. With the car parked on level ground, pull the trans dip stick and see if the fluid is proper level or not.
Why change the trans fluid wuth so little mileage? Is that due per maintenance schedule? Personally, I don't like flushing the trans. I prefer drain and fill with trans .
The 2nd Gen still have the trans dip stick right? Start the car and let it warm up to operating temp. Shift the gear a couple of time into different gear. With the car parked on level ground, pull the trans dip stick and see if the fluid is proper level or not.
Why change the trans fluid wuth so little mileage? Is that due per maintenance schedule? Personally, I don't like flushing the trans. I prefer drain and fill with trans .
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- Car
- 2014 qx70s
- Name
- Edwin
I dont like flushing them either due to the fact that when the fluid is dirty is because its accumulated worn clutch bits wich help older transmissions shift & when you remove it & add new clean fluid they start slipping. Id rather just drain & fill aswell.
Yes that is per the maintenance schedule (60,000 miles). I've always read that if you are going to change the tranny fluid that it's always better to do it sooner than later, within reasonable mileage of course. There was another thread on here about it and most people were suggesting it earlier than 56,000.
brammo350z
Member
- Car
- 2008 FX35 RED
- Name
- nakia
You are having one of two issues, either you have low fluid or when your radiator crack, coolant got into your transmission. You gotta remember that the transmission fluid runs through the bottom of your radiator. I've seen a lot of failed transmission because coolant was circulating in the trans fluid.
- Car
- 09 FX50
Mine does the same sort of thing with the shifting - but it is not slipping -after the 42k service.
They swore it was normal. I've been back 3x for them to "lubricate the axles" but that is a temporary fix then it comes back.
it's more of a 'bucking' like a manual car vs slipping. After I got my tune at VTR it made it a bit better because they adjusted the trans shifts...
get a trans reflash and see if that helps. Mine began to do the same thing as you are describing but it's not as much of a "slip" as the gears do catch, it's more like extra engine braking and a weird 2>1 downshift at rolling stops.
Like I said, Ive been to dealer 3x since 10k miles ago for same thing, they say it is normal for ~50k miles. The car drives fine otherwise, shifts fine, no actual "slipping" of gears but when you come to a stop sign or rolling stop there is an awkward 2-> shift......
get a TCU flash and ask them to lubricate the axles as it may help.... stupid 7 speed.. they should have stuck to the 5spd. & speed dont belong in sporty cars unless it's a super car that actually needs them for top speed.
They swore it was normal. I've been back 3x for them to "lubricate the axles" but that is a temporary fix then it comes back.
it's more of a 'bucking' like a manual car vs slipping. After I got my tune at VTR it made it a bit better because they adjusted the trans shifts...
get a trans reflash and see if that helps. Mine began to do the same thing as you are describing but it's not as much of a "slip" as the gears do catch, it's more like extra engine braking and a weird 2>1 downshift at rolling stops.
Like I said, Ive been to dealer 3x since 10k miles ago for same thing, they say it is normal for ~50k miles. The car drives fine otherwise, shifts fine, no actual "slipping" of gears but when you come to a stop sign or rolling stop there is an awkward 2-> shift......
get a TCU flash and ask them to lubricate the axles as it may help.... stupid 7 speed.. they should have stuck to the 5spd. & speed dont belong in sporty cars unless it's a super car that actually needs them for top speed.
- Car
- 09 FX50
That's exactly why I compared it to a manual-type feel. The "bucking" feels like manual engine braking type of thing....
They did a tranny flush right after the radiator change as per my request since I have 56,000 and one is due at 60,000 anyway so I doubt it was coolant in the tranny fluid. That's good info to know though, a radiator change should require a tranny flush as standard protocol if that's the case. Luckily I was due for one anyway or I would probably go get one just because you brought that to my attention.
---------- Post added at 06:18 AM ---------- Previous post was at 06:17 AM ----------
Wow that's crazy.
---------- Post added at 06:32 AM ---------- Previous post was at 06:18 AM ----------
So I went back to the dealer and had them check the fliud level in the tranny and they claim it was definitely low and they topped it off. I'm happy to say......... no more bucking. This certainly wasn't the normal kind of bucking some of you are describing as normal, as a matter of fact the day I was taking back to the dealer, I was leaving a gas station and I slowed to look both ways leaving the driveway and when I got back on the accelerator (I didn't no where near accelerate aggressively) the car paused then bucked forward so hard I felt like if I wasn't paying attention it could have launched me into oncoming traffic. The other thing I noticed that morning was that when I stopped completely, after about 3 seconds of being completely stopped I could see and feel the car try to push forward a little, then settle, seeming something like what shadow191 describes above.
The FX definitely does a fair amount of rough shifting with the 7 speed tranny but this was far beyond normal. Anyway if anybody ever experiences this type of thing as drastic as I did especially after a tranny flush, now they will know where to start trouble shooting. Thanks fellas.
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- Car
- 09 FX50
yaayyyyy
Dude the FX drives like a whole new car now that the tranny fluid is topped off correctly. I've never owned a car long enough to do a tranny flush I used to switch up every few years but if this is the result I don't understand why people are so dead set against at least one flush in a cars lifetime. The transmission is shifting waaaaayyyyyy smoother than it ever did since back when I had low mileage. It's borderline ridiculous.
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- Car
- 09 FX50
I showed my dealer this thread and dropped the car off for fluid check. I just found out my car still has 1yr left on extended warranty too...
The 2nd Gen FX's can not be drained and filled because the transmission is a sealed transmission and therefore can only be be serviced by the dealer using a machine they have which flushes the system. The machine probably automatically fills the tranny with a pre-set amount of fluid also which is probably why it was low, the service tech probably didn't even double check the fluid level after the flush. I'm pretty sure the difference in performance is the new fluid which is what I meant by everything I said in that last post.
---------- Post added at 09:37 AM ---------- Previous post was at 09:33 AM ----------
Yeah, go for it, your probably going to be surprised at the difference in shifting also. I'm hoping the smoothness sticks around for long time. It feels similar to how your car feels after a fresh oil change and you can feel that new fluid difference.
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