2004 yukon xl tranny slipping

[bighaas79]

unless you can find someone who has the special tools to loan you that you need to rebuild it, let someone else rebuild it for you. If you have to buy the special tools to do it yourself it would probably end up costing you more in the long run. trany special tools arent cheap. And as far as tranny fluid you can use dex 6 on nething that used to call for dex 3 EXCEPT transfer cases. (one of the additives in the dex6 will deteriate the nylon parts inside.) However you CANNOT use dex3 in nething that calls for dex6. Besides dex6 is a better trans fluid than the 3 neway. Has better friction modifiers and resists breakdown to higher temperatures. And really whats say $20 more spent on fluid compared to the $3000 spent on replacing a burnt up tranny?

[clinebarger]

Originally Posted by bighaas79

. And really whats say $20 more spent on fluid compared to the $3000 spent on replacing a burnt up tranny?

Wow, now this super fluid keeps transmissions from burning up?

His 3-4 clutch failure is not fluid related. Low fluid level maybe but not the type

If the transmission gets hot enough to break down dexron III its toast anyway I dont care what fluids in it.

[neo297]

Originally Posted by clinebarger

Wow, now this super fluid keeps transmissions from burning up?

His 3-4 clutch failure is not fluid related. Low fluid level maybe but not the type

If the transmission gets hot enough to break down dexron III its toast anyway I dont care what fluids in it.

my fluids are checked regularly and levels were good there was no warning of impending failure in regards to any slippage or shifting issues. I have had a slight noise that no one was able to isolate( wheel bearings, tire ballance/wear patterns were checked and tranny fluid replaced with a new tranny filter just in case and the fluid was red and not burnt then, that was 3- months ago there was no metal found in pan but no change in noise after) that noise was intermitent almost a harmonic that would increase in volume with acceleration and decrease with deceleration but was not there with coasting. Then one day it drove to work fine and upon start up and heading home 3-4 started slipping like hell. 1-2 and reverse work fine.

[lyrikz]

Originally Posted by clinebarger

Wow, now this super fluid keeps transmissions from burning up?

His 3-4 clutch failure is not fluid related. Low fluid level maybe but not the type

If the transmission gets hot enough to break down dexron III its toast anyway I dont care what fluids in it.

I think we are just saying RUN the dex 6. Not saying thats what caused it.. Thats my opinion. But, wouldnt running an inferior fluid speed up the process of the clutches failing>?

[clinebarger]

Originally Posted by neo297

my fluids are checked regularly and levels were good there was no warning of impending failure in regards to any slippage or shifting issues. I have had a slight noise that no one was able to isolate( wheel bearings, tire ballance/wear patterns were checked and tranny fluid replaced with a new tranny filter just in case and the fluid was red and not burnt then, that was 3- months ago there was no metal found in pan but no change in noise after) that noise was intermitent almost a harmonic that would increase in volume with acceleration and decrease with deceleration but was not there with coasting. Then one day it drove to work fine and upon start up and heading home 3-4 started slipping like hell. 1-2 and reverse work fine.

I was just stating low fliud level can cause this

Originally Posted by neo297

I called the shop you reccomended Gregg quoted me 2100 for rebuilt with upgraded 3-4 clutches etc and rebuilt tc, turn key installed with 3 yr 75,000 mile warranty. I just have to limp it to him from here but the cost of rebuilt upgraded trannys with slightly less warranty#s online seem to be running in the 14- 1800$ range with me having to do the labor I think taking it there is the best option for me.

Sounds good

Originally Posted by lyrikz

I think we are just saying RUN the dex 6. Not saying thats what caused it.. Thats my opinion. But, wouldnt running an inferior fluid speed up the process of the clutches failing>?

If he desides to run Dexron VI thats great, but a transmission shop is going to use DexIII because when you buy it in 55 gallon drums the price difference is alot more than 20 bucks. In my opinion DexVI will not make the transmission last longer.

[lyrikz]

Originally Posted by clinebarger

I was just stating low fliud level can cause this



Sounds good




If he desides to run Dexron VI thats great, but a transmission shop is going to use DexIII because when you buy it in 55 gallon drums the price difference is alot more than 20 bucks. In my opinion DexVI will not make the transmission last longer.

Dex 6 is more money.. I just went through this. I found WOLFS HEAD ATF fluid is a match with Dex 6. If your at a shop, have them send you a barrel of that. It works great in TONNSSS of applications. Its only 1.5 more a quart. Something small like that.

[neo297]

I appreciate both of your input. I understand that the fluid was unlikely to be the culprit but just as I want to replace the trans with upgraded parts to reduce the likely hood of early failure it is a small price to pay to upgrade the fluid.