3-5sec Lag On Throttle & Delayed Transmission

Recently I have been noticing my car revving high before changing gears while driving around town. Basically at the moment it's changing gears anywhere between 5-15km/h higher then normal, meaning I could be in 2nd gear cruising at 60km/h @ 3000rpm before it wants to shift to 3rd.

The delayed gear changes are intermittent, one trip fine, next trip crap. While it's shifting fine the gear shifts are smooth. not jerky at all. While it's not shifting fine the gear shifts can sometimes be jerky. Engine light comes on sometimes while this is happening, very rarely.

I've tried servicing the trans fluid, old fluid looked great, wasn't low. Cleaned throttle body with carby cleaner (while off car - butterfly moved freely), replaced TPS, replaced air filter. The air intake hose connected to the throttle body was slightly cracked so I taped it up really well with some gaffa tape.

Today while doing some 110km/h uphill driving, I gave the throttle a fair bit and the car didn't increase revs at all for about 3-5 seconds, it just maintained revs (even with throttle planted) and then all of a sudden starting revving and increasing speed as 'normal'. I believe this happened while going from 3rd to 4th gear. I was able to replicate the issue 2 more times.

 

Checked the maf sensor and it looked clean. Sits at like 700ish warm idle, idles smooth. Plugs replaced at last service (after this started happening), haven't replaced leads yet, they're maybe 1.5 years old.

I was thinking maybe leads or coil pack next but wanted some opinions before I put more money into it.

 

Yep, little black plastic thing that slips over the metal shaft? That went back on with the new TPS.

TPS was the first thing I tried and I actually tried two different TPS, the first one I tried had warped plastic around the plug, tested it and took it back for a replacement just in case. So I don't think it's that, unless it's a wiring/voltage issue, but I don't have a multimeter to test it and the plug and wiring all look ok.

 

Bridged those two terminals, no fault code stored, flashed 0012 three times then repeated itself. Went for a quick drive until the problem started (with the terminals still bridged) and still nothing.

 

So I was able to get my car up on stands today so I could get under it and inspect stuff I could from the bottom easier.

Made sure none of the wires running into or near the trans were damage, unplugged or dirty, all looked fine.

One thing I did find is that the centre bearing has a fair bit of play in it. Could this be causing the issue I'm having at all?

 

Good news, kept looking around yesterday and opening the front fuse box I noticed a fuse that wasn't seated right and was just kind of sat in it's slot. Sure enough it was the trans control fuse.

Seated it properly and went for a lengthy drive. The delayed shifting issue is gone, so that's nice.

Still have the issue where in higher gear (3rd I think) going above 80km/h and trying to accelerate hard upto 100 there is still absolutely no rev increase for a solid 3 seconds or more.

Also started noticing a jerky feelings when slowly backing out of my driveway during cold start.

 

Uh spoke too soon, still have the delayed shift issue thought for sure the fuse would be the issue but it's not.

Might just take it to a mechanic to see if they can figure it out.