Automatic transmission shifting problem

[tayyib330i]

Alright so last week I noticed my car was having problems on cold starts and car went limp, (that cog of death, but no other lights came on) but was resolved once I turned the car off and started it back up . I then checked my fuses when I got home and realized the secondary air pump fuse was blown. Got myself a new fuse and car was running fine. The next day starting up cold was fine and driving was fine till I hit like 60km (revving at 2100/2400) , the car would lag and make this weird thud. That scared the s*****t outta me. Ever since then I've been waiting till car has warmed up fully before driving.
Car hasn't done that again since but it stills feels laggy.
My idle is perfect on the car tho. Changed my ccv and all tubes (came in a winterized kit from ecs) , new disa, cleaned icv and throttle body. Also changed DR speed sensor and oil level sensor, fcabs (irrelevant haha)

Soooo I really don't know what's wrong. I've read everything from transmission wiring harness, to intake camshaft position sensor, to a whole f****n tranny swap!!!! Please help me if any of you have been through this! Canadian winter is on it's way and in no way am I prepared. All the help will b greatly appreciated!

I am going to get my tranny fluid flushed and filter changed asap cuz that ATF fluid looks really gross .

[WOLFN8TR]

FYI from what I've read do not flush the tranny. Drain it and change the oil and filter. Do it again in approx 3,000 miles to get all the old fluid out.

[tayyib330i]

Thanks for the heads up! Will make sure to do that
Also vehicle is standing at 125k (miles), drove car tonight and no problems , just that same hesitation sometimes when the auto Is down or up shifting from 4 to 5

[WOLFN8TR]

I had an issue with my transmission shifting from 4th to 5th before changing my Trans oil. Doesn't do it hardly at all anymore.

[az3579]

FYI from what I've read do not flush the tranny. Drain it and change the oil and filter. Do it again in approx 3,000 miles to get all the old fluid out.

What exactly is the difference between an oil change and a flush? I thought they were pretty much one in the same?

[Johnmadd]

What exactly is the difference between an oil change and a flush? I thought they were pretty much one in the same?

Flushing takes the viscous material away from the insides.

[az3579]

Flushing takes the viscous material away from the insides.

What exactly is the difference though in process? You have to drain it to flush it, don't you? That would be the same as an oil change.

[ELCID86]

^ I think some shops use a machine to flush. I've heard issues with the filters and particulates. Drain and swap is better.

[TigerTater]

I did the double drain and fill and my tranny is as stout as ever. Nice crisp shifts!!

[tayyib330i]

Alright so plan is to do double drain and swap this weekend.
I have to take the car in to my friends shop to get my rcabs, rear/front swaybar end links, and finish off with alignment.
So I'll get them to drain and swap my ATF (I'll make sure they don't try flushing hahaha) but then I'll have to do it again after a few k right ?