Scotty / An automatic transmission question Recently bought a 2006 Toyota Sienna LE w 110 K miles.…

dg2020

Scotty / An automatic transmission question Recently bought a 2006 Toyota Sienna LE w 110 K miles.

When I shift from PARK to REVERSE there’s a hard THUNK. But if I shift from PARK to DRIVE, then move and inch or two forward first, then shift into REVERSE, there is NO THUNK.

And occasionally when I’m driving and slow down and the car downshifts, there’s a hard thunk.

It also has a problem shifting from 2nd to 3rd… it slips just as it’s supposed to shift into 3rd. To remedy that, I pretend I’m driving a STANDARD ... and lift my foot off the accelerator just about the time it seems appropriate to shift into 3rd, wait a second till I feel the car shift and drop into 3rd, then I resume driving.

Are these two issues connected? Is there some sort of pressure plate that shifting into DRIVE first helps release? Do I need to rebuild the transmission or could it be a shift solenoid or speed sensor ?

Am I doing more harm to the tranny by driving it this way or can I continue driving this way until it completely fails then get it rebuilt...

Comments (10)
No. 1-4
Techsus
Techsus

OBDII scan it professionally. Post Trouble Codes right here. Foolhardy to guess at it...

Techsus
Techsus

OBDII scan it thoroughly, pray it's just a Transmission Solenoid going south. And agree-- check transmission fluid level and that it's clean, not burned, not dirty. When's last time it was changed?

dil 89
dil 89

That's pretty normal to let off the gas for it to shift on some but you could just have low fluid I'd check that first. You could also have a bad trans mount or motor mount

Jackofall
Jackofall

Last resort try Lucas trans fix.