diff lock and the 25mph rule
12-18-2003, 11:21 AM
#1
AudiWorld Super User
Thread Starter
diff lock and the 25mph rule
I am curious why if you lock the diff you can't go over 25mph. will the gears strip or fly apart? The quattro system is the best in the world but I wonder why they limited it to only 25mph, thats not exactly that fast unless you have serious snow conditions. what advantage in deep snow would locking the diff have over letting quattro do its job? curious
thanks
thanks
12-18-2003, 11:52 AM
#2
You need to read up on quattro. You have no idea how quattro works.
The "quattro advantage" is gained at the center differential.....not the rear diff. I've never used my rear diff for anything other than donuts!
12-18-2003, 12:09 PM
#4
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i think we need to appoint a ministry of information.
the rear diff locks in those very few situation where normal quattro operation can't get you unstuck.
as for the 25mph rule... it's not to protect the system, it's to keep you from killing yourself and/or wearing out your tire very quickly.
with the rear diff locked, the wheels spin at the same speed. so if you go a round a corner, your tires will have a very shaky relationship with the road. since in a corner, the inner wheels spin faster than the outers, you don't want it locked over 25mph anyway. and i have only used it for donuts, too. one day, perhaps, it will come in handy.
as for the 25mph rule... it's not to protect the system, it's to keep you from killing yourself and/or wearing out your tire very quickly.
with the rear diff locked, the wheels spin at the same speed. so if you go a round a corner, your tires will have a very shaky relationship with the road. since in a corner, the inner wheels spin faster than the outers, you don't want it locked over 25mph anyway. and i have only used it for donuts, too. one day, perhaps, it will come in handy.
12-18-2003, 12:17 PM
#7
Read my friend.....
Read this and if you have a question after that ask. Your car has an open front differential, a Torsen center differential, and an open but lockable rear differential.
If you're not sure what open or locking differentials are read up on those too!
After you read this you'll see just how "un-answerable" your question was. Believe me, it's not the first time we've seen it!!
Note: This article isn't 100% accurate. Most "older" Audi's come with a center Torsen and OPEN (but lockable) rear differentials like your car has. The newer cars don't have a lockable rear differential but use ABS sensors to do it automatically (up to 40mph).
HTH!<ul><li><a href="http://autozine.kyul.net/technical_school/traction/tech_traction_4wd_2.htm">Reading is FUNdemental!!</a></li></ul>
If you're not sure what open or locking differentials are read up on those too!
After you read this you'll see just how "un-answerable" your question was. Believe me, it's not the first time we've seen it!!
Note: This article isn't 100% accurate. Most "older" Audi's come with a center Torsen and OPEN (but lockable) rear differentials like your car has. The newer cars don't have a lockable rear differential but use ABS sensors to do it automatically (up to 40mph).
HTH!<ul><li><a href="http://autozine.kyul.net/technical_school/traction/tech_traction_4wd_2.htm">Reading is FUNdemental!!</a></li></ul>
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12-18-2003, 12:21 PM
#9
AudiWorld Super User
Thread Starter
i did read it
i didnt recall seeing anything about why 25mph is the maximum you can go with it locked though and that was my original question, plus subjective feedback on if locking the diff in deep snow has any true value compared to letting quattro work independently.