looking at purchasing a 98 sh with 140k miles (good deal) but i am starting to get nervous about the atts. i know they cost an arm and a leg to replace, are expensive to work on, and don't like FI. but how long do they last? if the car is relatively stock, how many miles can i expect to get out of it with agressive daily driving? and when it does go out, will it be just like a toasted clutch, slipping completely? or will it freeze up and act like a base model lude? somebody enlighten me.

 

bump! somebody knows...

 

Well if the "atts" light is on, on the dashboard, the "car functions normally, but without the Active Torque Transfer System." - according to the owner's manual.

I dunno about how much to replace it. I do like having it though. Plus there's something about the term "base model" that turns me off. Sorry...

 

ok, that i kinda knew, thanks for the reply. i'm more asking about what happens when the unit physically wears out?

 

I dunno. It's a Honda so things usually don't break.

 

Tell that to my crank pulley when it ripped off my H22.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RudeLude95 &raquo;</TD></TR><TR><TD CLASS="quote">I dunno. It's a Honda so things usually don't break.</TD></TR></TABLE>

that's the main reason i'm willing to buy a 140k mile car in the first place.

 

Well everything you think about atts is true (expensive to replace, disengages at approximately 250whp, and makes things harder to work on).

I have a 99 SH with 130k on it, for the first 3-4k I drove it pretty hard (got it at 123k) and I don't know how the other drivers did before me. So far I haven't had any problems with it though. If it does break I believe you have nothing to replace unless you want it back, you could just leave it on and deal with the 50lb's more it weighs.

ATTS is a great thing though. In 97 C&D did a test, best handling car under 30k, the SH won without ATTS functioning, and then brought it along with them on the best handling car period test, ATTS working and it held it's own against the viper, nsx, corvette, seeing that it's a stock fwd economy car. Oh and ATTS made a difference of 2 seconds on the 1 and 1/2 minute track, which is really good for that short of a track.

Bottom line, you should be fine. If your'e skeptical and it's from a dealer, see if you can get a warranty. Good luck and have fun with the SH, it's an all around wonderful car

 

He wasn't asking what it does, he asked what happens when it fails.

Without being entirely informative, one of two things would happen. From what I can tell (I own a 4th gen, not a 5th), the clutches inside the ATTS unit are what wear out, especially from higher-powered cars. To fix it, you'd have to have the unit rebuilt with new clutches.

If the clutches wore out, either you'd get slip in the ATTS unit similar to clutch slip, where you'd lose power to the wheels, or some sort of failsafe kind of thing would disable the ATTS unit and it'd function like an ordinary open differential. Someone with a 5th gen will hopefully clear that part up.

 

thanks, that's more along the lines of what i was looking for

 

you are right phil it does just that
i opened up one day on a strat street and for so reason the atts kicked out and the light came on the dash board. lose of a lot of power. but i shut off the car and turned it back on fixed i think the cluch in the atts slipped

 

Well parts are always expensive from the dealer. But I have seen may complete ATTS units selling on here for $300-400. You could replace the whole unit if it were to fail.

 

that sounds better to me.

 

mine did that around turns on jumping on the throttle, i just reset and all was fine. i dont like how the atts makes it a bitch to work on and since i dont autocross much i have gone obd-1.

 

what does obd1 do to the atts? does it still work? and i doubt that would be smog legal in ca, lol

 

Atts wont work at all if you change your ECU out.. i'm not entirely sure but I think most piggyback systems wont even work. I know Hondata wont not sure about AEM or Greddy. Thats what I have been told.. ECU must remain stock for ATTS to work. So we get to make HP other ways.. bump comp headwork n stuff

 

i see. i was hoping to score the car before he replaced the clutch so i could put a lightened flywheel in but he already had the clutch replaced. i was supposed to go get the car today but he flaked.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chuckles99SH &raquo;</TD></TR><TR><TD CLASS="quote">Atts wont work at all if you change your ECU out.. i'm not entirely sure but I think most piggyback systems wont even work. I know Hondata wont not sure about AEM or Greddy. Thats what I have been told.. ECU must remain stock for ATTS to work. So we get to make HP other ways.. bump comp headwork n stuff</TD></TR></TABLE>

ATTS will only work with something like the emanage, the VAFC, or EFI PMS. you must retain the OBD2 ecu.

 

interesting stuff. i guess what i was originally wondering is what it takes to fry an ATTS unit if the car is still making stock horsepower. i mean they must wear out eventually right?

 

So Greddy Emanage could be used and still retain the ATTS?

 

Bump, I wanna know too. Can some enlighten us?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chuckles99SH &raquo;</TD></TR><TR><TD CLASS="quote">So Greddy Emanage could be used and still retain the ATTS? </TD></TR></TABLE>

yup, the emanage can be used to tune fuel while keeping ATTS.

since it uses the stock ECU and alters A/F in the same way a VAFC does, you can keep all the ATTS related controls. it also has a few more features beyond the VAFC, though it's not as fully featured as a hondata.

 

When your ATTS system has any problem, it disables itself and the car drives like a Base model with a more aggressive suspension and 50lb's more weight. In fact, even if other systems in the car have a problem [for instance if for any reason the check engine light comes on], the ATTS system automatically disables itself as a 'safe mode' type of thing. It will not cause a problem, and the car will still drive fine.

 

im selling a a ATTS unit for 250+shipping.
it only has 75k miles on it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hondalude &raquo;</TD></TR><TR><TD CLASS="quote">im selling a a ATTS unit for 250+shipping.
it only has 75k miles on it.</TD></TR></TABLE>

Is there any problems with it?