Crossfield

Slow shifting Transmission when cold. Transmission has new fluid and filter. Could this be the Selonoid pack?

bradland

What type of fluid did you use? Toyota T-IV?
New fluid is somewhat meaningless if you didn't use T-IV or if the level is not correct.
If the issue only presents when cold the fluid level may be low.

paulo57509

If by slow shifting you mean it stays in gear for a while before upshifting (delayed shift)? This could be a normal and common occurrence. Typically it's the 2-3 shift that's delayed and only happens after an overnight start-up. Once it upshifts it doesn't happen the rest of the day.

Or are you trying to describe slow/delayed engagement when shifting from P to R or D?

Crossfield

I used Toyota Transmission oil , I believe that the shifting maybe quite normal as it shifts from I st to second when cold but once warmed uo shifts easy to second . More of a delay than a problem than a major issue .
Thanks

GoldStar

Generally, PCMs are programmed to hold lower gears a bit longer after a cold soak to get the engine revs high for a bit. This helps the engine get to operating temps quicker, meaning better emissions quicker. My 2nd gen Avalon does the same thing with it's 4 speed.

Stroock639

did it always behave like this or is it suddenly different after the fluid change? it's totally normal to shift slow when cold, and it'll hold 2nd gear until about 2500 rpm when the coolant is still below 100°F but only on the first run through the gears

CLLEXUSS

My 2000 does the same exact thing, perfectly normal.

crowe

Same on my 1998, normal.

GeenIdee

'99, same ****. Annoys the heck out of me.

What also annoys the crap out of me is the stupid quick shifting. Not a big deal, until you're in traffic. And when you slow down to a 2nd / 3rd gear speed, it decides to trow it back to first to begin with and then go back to 3rd while you haven't even increased speed from that point.

Lately I shift manually when I'm in a traffic jam

Stroock639

yea it can be a bit stumbly in slow moving traffic... a big part of it i think is just how the torque converter is designed to work, it doesn't lock up unless you really step on it or if you're cruising at >45 mph in 5th

the key to minimizing that traffic jerkiness it to be veryyyyyy gentle on the gas until you can feel the "slack" taken out of the drivetrain and you've got some momentum going

Yamae

Don't you have this type of quoted symptom below?
If so, you'd better to read this thread and clean the throttle body and air mix passages.

400fanboy

The smoothness of the shifts is improved, but it doesn't stop the car from the car shifting into 1st gear unnecessarily. In my opinion, the car should stay in second instead of downshifting to first under these very light throttle applications where you don't come to a complete stop.

I actually find myself engaging the SNOW traction control setting during these low-speed situations. The shift logic programming in this mode is much more adept for the 0-15mph stop & go traffic, as the transmission will not shift into first unnecessarily.

Losiracer2

The very first 2-3 shift of the day mine also shifts around 2700RPM and then its fine. I think its a quirk that these A650E transmissions exhibit in the 98-00s. Maybe something programmed into the shift logic to get the fluid flowing from a cold start, idk. But it will seemingly hold at 2500rpm until you reach that 2700RPM threshold then it'll shift fine. I played around with it for a block one time by not going over that engine speed and sure enough it didn't shift until I crossed that point.

But if you have jerkiness, clean the airmix paths in the throttle body, that helps with part throttle air flow and smooths out the low speed, in-traffic shifting. That or your mounts are worn out and causing excess slop in the driveline. Replace with OEM they're under $300 for all three (2 hydraulic engine mounts, and 1 transmission mount) Your car's NVH and smoothness will be restored like brand new again.

Stroock639

definitely something programmed in... using my OBD II adaptor + engine link app to monitor live sensor readings i was able to see that the holding 2nd gear 'quirk' only happens as long as the coolant is still below ≈100°F or so, which is the point at which the physical needle will just start to move off its peg

also even if the coolant is still below the minimum temperature it won't hold 2nd in the same way if it's already done a 2nd to 3rd shift, and it won't again until the next cold start... it's only the first 2nd to 3rd shift of any given drive that it does this

GeenIdee

Ye to me it also feels like it's programmed in. The same as that it holds gear above +/- 60 (100kph), but it releases the clutches below 60 so the engine goes to neutral.

Can't say its jerky, perhaps when cold but that's not weird tbh.

I wonder if anyone ever reprogrammed the TCU