Transmission Flush - Do or DON'T??

[mejim707]

Originally Posted by crystalworks

Nice that the o2 solved most your issues. Always important to eliminate other causes for possible trans problems first.

Change the fluid, rubber seals, and service with Valvoline MaxLife multivehicle. DO NOT USE ZF LG6! LG 6 should only be used on a vehicle that has had regular maintenance. I'm one of the few who have experience with LG 6 on high mileage, not serviced, transmissions (multiple vehicles). Do not use ZF fluid. It's a waste of money and is thin resulting in not maintaining pressures.

That said, at your mileage, as others have said, changing fluid (or not changing fluid) may result in blaming a fluid change for trans errors or other erratic behavior. No way of telling. At your mileage with no service history your trans is a time bomb. If keeping the vehicle, prepare for a trans change financially.

Were it mine. Change with Valvoline fluid, not flush, just drain and fill. Replace bridge, tube, pan/filter, and mech seals. Good luck.

Thanks for the reply! Yes I totally agree on the "time bomb" part lol Stupid me I relied on a "reputable" indie shop years ago when it only had 120. I called them and said I want to change the fluid and they told me "DO NOT CHANGE IT IT'S BEYOND THE 100K MARK". He proceeded to say that at that milage there's too much friction material in the fluid and it will ruin the transmission if I change it. In retrospect I should have just gone with my gut. But a trusted friend told me to call, and they were the "experts" so I listened. Never again.

I know at some point I'll need a new transmission. I have no problem doing that job myself and it will give me an excuse to but a car lift for my shop! Transmission + lift would still be cheaper than having a shop do the job and the lift will get countless uses so it's worth it.

For now however, I'll do the change. That's my upcoming project for a not so cold day.

Can you offer any advice on where to get the kit and a possible brand you would recommend? I know "BMW" OE is the desired but I'm sure there are comparable aftermarket brands some may have experience with.

I'll go with your recommendation as well and avoid the ZF fluid. If I end up having any slipping issues there is the "Instant Shudder Fixx" stuff I could try.

Thanks!

[mejim707]

Also, I believe I have the GA6HP19Z transmission. Is that the ZF 6HP?

Again, just trying to find the correct service kit and possibly the mechatronic service pats as well.

Thanks

[mejim707]

These are a few of the items I've found.

Service Kit:
https://www.amazon.com/Bapmic-6HP19-...d=WCZ5VZTKWEJR

Valvebody to Case:
https://www.amazon.com/AUTOKAY-6HP19.../dp/B07LFBWH6G

2 Gallons of Valvoline Maxlife Multi-vehicle Fluid:
https://www.amazon.com/Valvoline-Mul.../dp/B008QDV2JG

Does all of the above look correct?