Folks
when I back off the throttle and stay off it for a few seconds at say 50mph and above it feels as if the back of the car is pushing the front along. Is this a problem with the Torsen centre diff or is this just how the RS2 is?
Paul
Torsen Problem?
RE: Torsen Problem?
If you do your constant 50mph down hill with the throttle closed, does it feel as if someone is very slightly dabbing the brakes?
This was the one symptom of my car's poor running that didn't go away after spending a heap on it. I think it's just a four wheel drive thing; I had a really early Range Rover for ten years that had a lot of drive-line shunt when you backed off. When I sold it, with 250,000 miles on it, it was no worse.
The RS2 is nothing like as bad as that - just this slight feeling of it "hunting" on the over-run - so I've decided to live with it, after all there is a lot going on with the four wheel drive.
This was the one symptom of my car's poor running that didn't go away after spending a heap on it. I think it's just a four wheel drive thing; I had a really early Range Rover for ten years that had a lot of drive-line shunt when you backed off. When I sold it, with 250,000 miles on it, it was no worse.
The RS2 is nothing like as bad as that - just this slight feeling of it "hunting" on the over-run - so I've decided to live with it, after all there is a lot going on with the four wheel drive.
Volcano Black 1995 RS2. Standard.
Gone - but understood to be alive and well and living in Cornwall.
Gone - but understood to be alive and well and living in Cornwall.
RE: Torsen Problem?
scillyisles and the other long term owners will be along any minute with their wise counsel.
Volcano Black 1995 RS2. Standard.
Gone - but understood to be alive and well and living in Cornwall.
Gone - but understood to be alive and well and living in Cornwall.
-
scillyisles
- 3rd Gear
- Posts: 328
- Joined: Tue Feb 11, 2003 9:31 pm
- Location: uk
I cannot say I have ever experienced the sensation of the back of the car pushing the front when you back off the throttle. In general terms the 4wd system on the RS2 is not intrusive.
I have heard of the locking diff button sticking on due to the system rarely being used (don't think I have ever used mine) but the symptoms of this would be different and turning would generate tyre scrubbing noises particularly on tight turns.
Are your engine mounts worn?
I have heard of the locking diff button sticking on due to the system rarely being used (don't think I have ever used mine) but the symptoms of this would be different and turning would generate tyre scrubbing noises particularly on tight turns.
Are your engine mounts worn?
Audi RS2 - the original
Not busy again at work, so I've been reading up on the Torsen differential. It seems paulsf's problems are unlikely to be the Torsen.
The Torsen differential was invented in the US in the 50's by Vernon Gleason who patented it in 1958. It is simplicity itself but costly to manufacture, using worm drive instead of bevel gears. The characteristic of the worm and worm wheel that Vern Gleason was interested in is one-way drive. Where a conventional diff allows drive to be both added and subtracted, which will allow an unloaded wheel to spin, the worm drive prevents this; the worm will turn the worm wheel but not vice versa.
Because it is so simple it acts instantly, unlike the electronic, hydraulic or viscous coupling arrangements some manufacturers fit which are cheaper and easier to install than the full-house Torsen set up that Audi use.
I also discovered that the Audi TT quattro, despite being called a quattro, is not a traditional quattro at all but uses a variation of the VW 4motion shemozzle with a viscous coupling Haldex diff. The Haldex diff relies on fluid in the diff heating up when one side starts to thrash about when traction is lost to become almost instantly denser to lock the outputs together.
"Almost instantly" is the key. The viscous coupling and electrickery systems react slower than old Vern Gleason's Torsen.
Despite sounding vaguely Scandinavian, the name Torsen is an abbreviation of Torque Sensing. The Internet - I love it!
The Torsen differential was invented in the US in the 50's by Vernon Gleason who patented it in 1958. It is simplicity itself but costly to manufacture, using worm drive instead of bevel gears. The characteristic of the worm and worm wheel that Vern Gleason was interested in is one-way drive. Where a conventional diff allows drive to be both added and subtracted, which will allow an unloaded wheel to spin, the worm drive prevents this; the worm will turn the worm wheel but not vice versa.
Because it is so simple it acts instantly, unlike the electronic, hydraulic or viscous coupling arrangements some manufacturers fit which are cheaper and easier to install than the full-house Torsen set up that Audi use.
I also discovered that the Audi TT quattro, despite being called a quattro, is not a traditional quattro at all but uses a variation of the VW 4motion shemozzle with a viscous coupling Haldex diff. The Haldex diff relies on fluid in the diff heating up when one side starts to thrash about when traction is lost to become almost instantly denser to lock the outputs together.
"Almost instantly" is the key. The viscous coupling and electrickery systems react slower than old Vern Gleason's Torsen.
Despite sounding vaguely Scandinavian, the name Torsen is an abbreviation of Torque Sensing. The Internet - I love it!
Volcano Black 1995 RS2. Standard.
Gone - but understood to be alive and well and living in Cornwall.
Gone - but understood to be alive and well and living in Cornwall.
Thanks for the replies folks. I have a clutch change coming up soon so I guess some new engine mounts and a check/replace of the rest of the transmission couplings and mounts (and engine mounts too) should probably tighten everything up again.
Just how hard is a clutch change if I get my mechanic friend involved and have access to a ramp and tools? Can it be done without removing the engine?
Paul
Just how hard is a clutch change if I get my mechanic friend involved and have access to a ramp and tools? Can it be done without removing the engine?
Paul
if you want a cheap OEM clutch disc and pressure plate let me know.I have my old one for grabs
email me: vasilis3690@gmail.com
email me: vasilis3690@gmail.com
Well that clutch change is required a bit sooner than I had hoped!! Was out delivering my son to Cubs and the clutch pedal started to squeak. Curious I though but anyway parked up and dropped the boy. Got back in 5 minutes later pushed the clutch in to start it and it banged to the floor once I'd pushed it the first inch! Bollocks thought I. Two AA trucks later, the first broke it's front suspension with my car on the back, and I have a dead car on my drive.
So, what to do. I take it a DIY clutch repair is going to get messy? What is the dealer price for a clutch change? Any independent specialist anyone knows in Lothians? I have a friendly garage who could try and do it but he doesn't have a slot for about 3 weeks.
So, what to do. I take it a DIY clutch repair is going to get messy? What is the dealer price for a clutch change? Any independent specialist anyone knows in Lothians? I have a friendly garage who could try and do it but he doesn't have a slot for about 3 weeks.
Got a main dealer quote for £1020 this morning. Almost delighted with that?!!? Also an Audi repair centre quoting £930. Waiting for my 'independent' quote before getting the work done. Only problem will be parts availability as the clutch isn't available currently even on back order. On the positive side I will just have to pedal my bikes for more miles over the next few weeks!!
as i said previously i have the clutch disc and pressure plate nearly new.I can have them sent to you all costs paid for 200GBP. The only thing you will need to buy would be the release bearing to buy which is part number: b 012 141 165 E (around 25GBP i believe from the dealers).
My clutch disc and pressure plate are OEM bought from audi Greece and used only 1500Kms and that is because i then went to carbon clutch due to an engine upgrade.I can ask my brother who is in Greece to make a package and have it sent to you anytime.
Let me know
Vasilis
My clutch disc and pressure plate are OEM bought from audi Greece and used only 1500Kms and that is because i then went to carbon clutch due to an engine upgrade.I can ask my brother who is in Greece to make a package and have it sent to you anytime.
Let me know
Vasilis
Thanks for the offer Vas but if I end up at a dealers I want the work fully warranted which would only happen with parts that have sourced themselves I believe.
Next question. When my mate was looking at some other stuff under the car recently he did comment on the fact the exhaust would have to come off for the clutch change when it did happen but he thought it might not go back on again as some of the joints were badly corroded and would just crumble on demounting. So, is it worth upgrading to a Milltek cat back if i can find one?
Next question. When my mate was looking at some other stuff under the car recently he did comment on the fact the exhaust would have to come off for the clutch change when it did happen but he thought it might not go back on again as some of the joints were badly corroded and would just crumble on demounting. So, is it worth upgrading to a Milltek cat back if i can find one?
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