tranny flush!

[1998 k2500]

Hi guys, just wonder how hard is it to have the tranny flush? is this something can be "DIY" job? any special tool for this job? any instruction? thanks (1998 K2500 7.4L)

[2000CAYukon]

I am not a fan of the tranny flushes, especially when they don't replace the filter. Some chain service centers sell this service and they basically disconnect the tranny cooler lines and hook it up to a flush machine. The filter never gets replaced so in my book this is not good.

Your best bet is to drop the pan, replace the filter and install a drain plug if you don't already have one (this makes it so much easier to drain the fluid). Most parts stores sell a tranny drain plug.

Install the new filter, replace the pan (with drain plug installed), refill the tranny and start the engine. Top off when the tranny is warm to proper level. At this point, if you really want to replace more fluid, drain (using the drain plug) and refill. This will replace most of the fluid and in my opinion is a better way to go.

//2000CAYukon

[567234ta]

i have heard of the quicky stop or jiffy lube machines causing problems with the trans because of the pressure causing damage. i wouldnt let them hook that machine up to my truck. but then i wouldnt go to those places for anything anyways.

[gejandsons]

If you do a "tranny flush" be sure & drop the pan afterwards & change the filter.

[Marsal420]

How hard is it to install a drane plug? I have wanted to do this for some time now but havn't really felt sure enough about it to really go ahead and do it.

[567234ta]

Originally Posted by Marsal420

How hard is it to install a drane plug? I have wanted to do this for some time now but havn't really felt sure enough about it to really go ahead and do it.

unless your racing or hauling heavy loads on hills often where the tranny fluid gets destroyed quick you probably dont need one. you got to drop the pan to change the filter anyways. so normally if your going to change the fluid you should change the filter also.
this link may help you though.
http://www.snowplowing-contractors.c...wing_snow.html

[2000CAYukon]

A drain plug makes changing the filter and fluid so much eaiser that it is worth the install. The ones that I use require you to drill a 1/2 hole in the pan so it is easy to install.

When I change the fluid, I drain the first gallon directly into a funnel and jug. After that, the pan can easily be removed without making a mess.

Most auto parts stores carry these type of drain plugs.

//2000CAYukon

[Marsal420]

Im def going to pick one up , just makes sence to drain out the fluid first like you would while changing your engine oil and just take the trans pan off and go from there.

[REDHEARTBEAT]

The drain plug is the way to go! I refresh my tranny fluid every other engine oil change, it's cheap. I run a 4000 rpm stall convertor and am hard on the transmission so fresh fluid is a must for my application.

[wafrederick]

I am not a big fan of transmission flushes either.When they do a flush with the machine,the fluid is pushed in back wards and the is not good.Where does the dirt and metal shavings and dirt go?In the valve body,the valves inside have a very tight clearance.The valves will stick and cause problems.I know one transmission shop that loves doing valve body cleanings because of a transmission flush with the machine.The machine also uses more fluid.Here is a better transmission flush called a transmission line flush.Remove the bottom line from the radatior,connect a hose to that line pointed to a pan.Start pouring in fluid while running,making sure the transmission does not go dry.Stop when it is clear and you are done.Reinstall the line into the radatior.