GM Transmission service

[Gmfm]

I’m a firm believer in just a drop and swap. The filter replacement and pan cleaning are the important things being done here. When I did mine the magnet was slugged over in break in material. A lot of fluid comeS out during a filter change. Just the nature of flushing machines can provide negative results. In the future if you want to change more fluid out you can do so with a fluid pump through the dipstick. There’s lots of info and videos out there. Here’s a good read

http://www.powaytransmissions.com/Home/TransmissionFlush

 

[STORMIN08]

doesnt the dipstick enter the pan ????? maybe i am missing what you are saying...

i would drop pan, remove filter and drain...then use pressure port to evacuate more fluid from convertor...


reinstall new parts and top off, possibly then running for 5-10 sec in each gear...drain pan only and top off again. you could repeat one more time, but the should be adequate for most services.

 

[Jason in DLH]

That’s what I used first...a vacuum pump that I I originally use for brake bleeding. Worked great at sucking up lots from the dipstick. Then detach one of the cooling lines and aim towards a bucket and start the engine for a short bit to pump some out that way (being careful not to run the pump dry). I was able to pull the pan without dropping fluid. Well. I dropped a bit just like a baby does by not paying attention, but I could have accomplished a clean swap!

 

[Jason in DLH]

Oh, and I also stuck the vacuum line in the slightly dropped pan to get most of the fluid out before dropping it fully.

 

[Bob2C]

Gasket puller tool?

I left the filter gasket and just replaced the filter.


Sent from my iPhone using Tapatalk

 

[number9]

Years ago I owned a new 1999 OBS 1500 Z71. I had 2 friends with same gen GM trucks get their trans flushed and BOTH went out within a couple months.

I was at the GM dealer one day in the service dept and asked a guy where to find the "transmission man". He was an older guy, looked like a neat and orderly fella. He replied HE was the "transmission man." So I told him what happened to my friends and I wanted his opinion on what was best for my new truck. He looked around and leaned in and told me "Don't touch it. Leave it alone and just drive it".

I followed his advice on that truck - NEVER touched the trans in any way. Sold that truck with 116K miles to my brother, who drove it to 230K miles before selling it. No tranny issues ever.

I have a 2002 2500HD that I bought used with 27K on it. I've never touched the trans at all. Now has 185K on it with no issues.

My wife has a 2003 Yukon we bought used with 35K on it. I've never touched the trans at all. Now has 247K on it with no issues.

We recently bought her a 2019 Tahoe with 42K on it. Guess what? I'll never touch that trans either.

 

[swathdiver]

Years ago I owned a new 1999 OBS 1500 Z71. I had 2 friends with same gen GM trucks get their trans flushed and BOTH went out within a couple months.

I was at the GM dealer one day in the service dept and asked a guy where to find the "transmission man". He was an older guy, looked like a neat and orderly fella. He replied HE was the "transmission man." So I told him what happened to my friends and I wanted his opinion on what was best for my new truck. He looked around and leaned in and told me "Don't touch it. Leave it alone and just drive it".

I followed his advice on that truck - NEVER touched the trans in any way. Sold that truck with 116K miles to my brother, who drove it to 230K miles before selling it. No tranny issues ever.

I have a 2002 2500HD that I bought used with 27K on it. I've never touched the trans at all. Now has 185K on it with no issues.

My wife has a 2003 Yukon we bought used with 35K on it. I've never touched the trans at all. Now has 247K on it with no issues.

We recently bought her a 2019 Tahoe with 42K on it. Guess what? I'll never touch that trans either.

Do keep us posted on that 2019 Tahoe's transmission, right around 100K report back in...

 

[number9]

Do keep us posted on that 2019 Tahoe's transmission, right around 100K report back in...

That will be about 4-5yr from now (depending on yearly miles) but if I can remember it I will do it.