TRANSMISSION into Drive Issue?

Guys I notice when I put my truck into drive there’s the usual very small lurch forward while your foots on the brake that we all feel when dropping into drive but then there’s a second small lurch forward about a second after the initial one. Is this normal with the new trucks? Seems to do it every time.

 

ABS self check everytime you drive the truck. It’s normal

 

No, I’m not talking about a clunk or a sound - the vehicle moves like when you back up and stop then put into drive you can feel the vehicles in drive by a forward motion nudge. It does it twice.

 

Well remember when you start it the truck jacks up idle for 2-3 seconds (I have zero idea why) most wear happens at start-up. Next time wait 5 second before putting in drive and I bet there is zero lurch as the idle is low.

 

Got ya my bad. Post below mine had a good idea. Do you give it a few seconds to warm up? I’m sure you’ll hear different opinions but I like to let my vehicles warm up a little before I move them.

 

This is every time. Hot or cold. Not on first start up. 2 slight nudges if you know what I’m trying to say here. You’re right about the fast idle, you can feel the forward drive nudge for sure (normal) but I get 2 of this type nudge, warmed up or not. Almost as if there’s 2 gears it has to go into and engage (I know there’s not 2 gears, I just don’t know how to explain it). I guess I need to mention it to my dealer.

 

Mine does the same thing. More so when going reverse to drive. Feels like the clutch pack engages and then a band engages a second later. It feels like it went into drive but it's not "all there" Sometimes I wonder if something is going on.

 

No problem. I’m one that lets my vehicles warm up a tad too before moving.

 

THIS is what I’m talking about. More so from reverse definitely.

 

When I start the truck, I put the key in, turn it to accessory, wait for the gauges to light up, then I turn it over to start it. This gives the fuel pump a second to start and make full pressure.

When the motor starts, it revs higher as the secondary air pumps are adding air, and the truck is adding fuel. This improves the air quality from the tail pipe. Part of the improved emissions. The down side, the secondary air pumps get water in them and the bearings fail.

https://youtu.be/IS17lydusIE

 

This has nothing to do with what I’m talking about

 

Bring it by the dealer and see what a tech thinks.

 

Hm I’m stumped on this lol. I got a little thump when I go into gear but not what you’re describing. Have a 2020 with less than 5k miles on it. Seems you got a brand new truck also. Keep us updated what comes of this I’m curious

 

Yea it does seem to happen coming from reverse. I’m going to test this out to be sure.

 

It’s just the rear diff deflecting up or down. Normal on leaf sprung vehicles

try it in 4x4 and it should be much less of a lurch, because the front diff won’t move around as much

 

Well hell lookie that! Thanks, that makes the most sense out of everything. Especially coming from reverse makes perfect sense! Thank you!

 

Anytime, we get the question a lot at work. My 01 Tacoma does , 02 Tacoma, 05 tundra. They all do it. The more power the engine has, the more you’ll feel it

 

Negative ghost rider, it is not the diff loading up. It is definitely trans, just don’t know of it is normal or not. The truck attempt some forward motion but it’s not all there almost like when you’re slipping a clutch

 

When you put it in drive, the driveshaft will move a bit. Reason is the brakes are holding it. Nothing else. The brakes are on the axle, which can freely move up or down just a little bit. Every leaf sprung vehicle I’ve owned has done it. When in 4wd it typically won’t jerk

 

There’s no slippage, just 2 slight nudges, none harder or softer than the other. I will get my dealer to check it out just to be on the safe side. It’s done it since day one. I’ve got about 1200 miles on it now.

 

Might be hill start assist. Can feel it when truck goes reverse or drifts back when parked on mine. Definitely 2 slight nudges, brakes release first, driveline slop second.

 

This sounds likely. I haven’t owned one with Hill start. And at work it’s all flat so I’ve never tested that.

 

Only happens coming from reverse. Normal from P to D all day long.

 

^ This. @PonyMan are you on any sort of incline? My driveway has a slight incline and while I don't get a lurch forward, I do get a slight jerk sometimes after taking my foot off the break and hitting the gas to back out.

EDIT: I see you said it was flat... how flat? Hill holder likes to activate at very low angles.

 

How is your idle?

 

Did you ever figure out what the issue was or if it’s normal? I have a 2014 with only 26k on it and it does exactly as you describe. If I have someone go from reverse to drive while I’m looking under the truck I can see the shaft move in the direction it should (1st bump) then it moves in that direction again a second later (second bump). Dealer says it’s gear lash or axle wrap but it’s definitely not.

 

It’s the rear axle shifting. Normal coming from reverse.

 

anything I can do to help that?

 

In another Aisin-Warner transmission that double engagement would mean a low line pressure due to wear in valve body. I've had two valve bodies replaced, both have had double D engagements at the end of their lives.

Don't ignore it, have your dealer writing down an official note in the system that you have a complain about transmission. Transmission doing a double D thump, even barely noticeable, is not good. If it's valve body, it will get worse and worse over time. Low line pressure also means the clutches are underengaging, they will start slipping when the pressure drops even more. Having a remark that the truck had problems early in its life is good from liability point of view, since Toyota could fix it back then, when the mechanical part of the transmission was not destroyed yet.

Of course, it can be something else.