Hi guys i always care about all fluids in my car like engine transmission coolant brake .. so now my car 120k and i am thinking to make maintenance to axel and differential is it ok to change there oils .. does anyone has experience before
Saisal
I just did both diffs and transfer case fluids 2 weeks ago at 142k and t's very simple and straight forward. Assuming you have a 7P, this post below helped me and has everything you need to know.
https://www.clubtouareg.com/threads...-differential-transfer-case-fluid-changes-for-second-generation-touareg.292235/
https://www.clubtouareg.com/threads...-differential-transfer-case-fluid-changes-for-second-generation-touareg.292235/
What year Treg do you have?
Changing fluids is highly recommended to keep your Treg in good running condition.
The link provided above is an awesome thread to follow for some of the fluid swaps. There are others that you can find using the "Search Community" feature at the top center of the page.
Changing fluids is highly recommended to keep your Treg in good running condition.
The link provided above is an awesome thread to follow for some of the fluid swaps. There are others that you can find using the "Search Community" feature at the top center of the page.
Yup. Change your diff fluid every 20k-30k. It's easy!! Over fill it, comes out the vent tube. If you don't... you might be contacting me for a rebuild 😉. I love business but also hate when cars fail fellow gear heads.
Cheers! @the_diffman
Cheers! @the_diffman
Considering I've rebuilt dozens of these, there is clearly an issue with the front diffs on these cars. Changing the oil in them regularly costs maybe $100 over the lifetime of your vehicle.
Got this on my bench last week, I know this guy wishes he changed the oil when he started to hear a distinct humming at 30-50 mph.
![Image]()
![Image]()
Got this on my bench last week, I know this guy wishes he changed the oil when he started to hear a distinct humming at 30-50 mph.
Is it more frequent changing of fluids that's needed to stave off failures or are the components used in the diff just underrated for the function?
With the risk of being internet shot by arm chair mechanics. Just my opinion backed by experience.
1st: VW recommends 80,000 mile diff oil changes. That could be 8 years of freeze thaw, 150 degree to -35 degree over and over again. No fluid will retain its properties for that period of time and with the very natural abuse of life. Every manufacturer wants to tout "life time fluid" and "15k mile oil change intervals"....you do you, but you're just asking for your car to give up the ghost by pushing fluid life, especially if you live in an area where it gets to 100 in the summer and below 0 in the winter.
2nd: The old style diffs are beefier in every way. They use a cup and cone style pinion vs. the double roller bearing style of the 2011+. I believe the cup and cone are the exact same bearing size used in the venerable Dana 60. However, BOTH differentials experience failure around 100k miles. By the time VW recommends changing the fluid, the damage is already done. Why this is, I can only speculate, but I see it all the time. Change your fluid sooner, can't hurt? Who knows...most of these cars have over 50k miles on them now.
3rd: The vent tube is often broken when I get on in. Check it. Water gets in and you are toast. The old ones have a long piece of tubing, the new ones have a pinched rubber end. If that gets broken or lose, it doesn't take long for water to enter the diff. And that's the other thing, if you drive through some water, you will get some in there. Change the fluid. Drive through rainstorms for 8 years...you have water in your diff, guaranteed.
4th: I set the pinion to 29 inch lbs of rotational torque. I have no idea what they crank it down to at the factory. It loosens up quickly after being driven. 29 is recommended for similar style diffs found behind the new Ford Explorer. If VW cranked it to say 50ftlbs, that could be the culprit.
5th: You will be hard pressed to find any mechanic who will say 80k mile fluid changes are a good idea for...any fluid! If you love your car, change the fluid. It's cheap. Especially diffs and transfers, they are so easy. The front diff drain plug is about 8 inches from the oil plug. A liter of high quality 75W-90 is about $20. I say change every 20k on my rebuilt diffs. If you have ever taken one out, spent the money to have it rebuilt, and put it back in....changing it every 2 years should be a no brainer. Good fluid that's old isn't as good as bad fluid that's new.
In closing! Design flaw, yes, why...I'm not sure. Recommended fluid change interval too long, yes. Love your car, change the fluid, it's easier than changing oil and cheaper. Maybe 20k is too short for some, but that's 2 years of freeze thaw and hot summers for me. My fluid is wearing out...so are my fingers.
1st: VW recommends 80,000 mile diff oil changes. That could be 8 years of freeze thaw, 150 degree to -35 degree over and over again. No fluid will retain its properties for that period of time and with the very natural abuse of life. Every manufacturer wants to tout "life time fluid" and "15k mile oil change intervals"....you do you, but you're just asking for your car to give up the ghost by pushing fluid life, especially if you live in an area where it gets to 100 in the summer and below 0 in the winter.
2nd: The old style diffs are beefier in every way. They use a cup and cone style pinion vs. the double roller bearing style of the 2011+. I believe the cup and cone are the exact same bearing size used in the venerable Dana 60. However, BOTH differentials experience failure around 100k miles. By the time VW recommends changing the fluid, the damage is already done. Why this is, I can only speculate, but I see it all the time. Change your fluid sooner, can't hurt? Who knows...most of these cars have over 50k miles on them now.
3rd: The vent tube is often broken when I get on in. Check it. Water gets in and you are toast. The old ones have a long piece of tubing, the new ones have a pinched rubber end. If that gets broken or lose, it doesn't take long for water to enter the diff. And that's the other thing, if you drive through some water, you will get some in there. Change the fluid. Drive through rainstorms for 8 years...you have water in your diff, guaranteed.
4th: I set the pinion to 29 inch lbs of rotational torque. I have no idea what they crank it down to at the factory. It loosens up quickly after being driven. 29 is recommended for similar style diffs found behind the new Ford Explorer. If VW cranked it to say 50ftlbs, that could be the culprit.
5th: You will be hard pressed to find any mechanic who will say 80k mile fluid changes are a good idea for...any fluid! If you love your car, change the fluid. It's cheap. Especially diffs and transfers, they are so easy. The front diff drain plug is about 8 inches from the oil plug. A liter of high quality 75W-90 is about $20. I say change every 20k on my rebuilt diffs. If you have ever taken one out, spent the money to have it rebuilt, and put it back in....changing it every 2 years should be a no brainer. Good fluid that's old isn't as good as bad fluid that's new.
In closing! Design flaw, yes, why...I'm not sure. Recommended fluid change interval too long, yes. Love your car, change the fluid, it's easier than changing oil and cheaper. Maybe 20k is too short for some, but that's 2 years of freeze thaw and hot summers for me. My fluid is wearing out...so are my fingers.
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
