Do cars with and without traction control have the thumping issue??
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AudiWorld Super User
Joined: Sep 2005
Posts: 2,666
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Do cars with and without traction control have the thumping issue??
I ask as there is another retard request from the ASR/ABS unit that potentially could cause confusion for the trans if it went haywire.
This sort of thing could cause surging in rpm if the ecu gets a badly timed request for retard and this in turn may cause the trans to go hunting.
Has anyone here logged all measuring blocks while their car is actually hunting???
If so it may be worth finding someone with a similar car that doesnt hunt and running the blocks against the car that does
This sort of thing could cause surging in rpm if the ecu gets a badly timed request for retard and this in turn may cause the trans to go hunting.
Has anyone here logged all measuring blocks while their car is actually hunting???
If so it may be worth finding someone with a similar car that doesnt hunt and running the blocks against the car that does
Junior Member
Joined: Feb 2004
Posts: 816
Likes: 1
Or do the transmissions behave differently when in Cruise Control?
In reading some of the excellent literature available on the ZF 5HP24 transmissions and Bosch controls from our friends with BMWs, it is noted that the program for the TCU is modified to
not shift as frequently, and not drop the TCC so readily as when the Cruise Control is not activated.
Hmm Disconnect the hardware, and activate the CC electricals, then drive "normally without touching the brake pedal. Will that do it?
I know, tough to try in real world road conditions, but..
Random thoughts.
I would try, but my CC is non-op at this time. If the non-op condition is hardware related, I didn't observe modified behavior during the last test drive. Unfortunately, I was not considering this aspect at the time, and could have easily missed something.
Regards
CalG
CalG
not shift as frequently, and not drop the TCC so readily as when the Cruise Control is not activated.
Hmm Disconnect the hardware, and activate the CC electricals, then drive "normally without touching the brake pedal. Will that do it?
I know, tough to try in real world road conditions, but..
Random thoughts.
I would try, but my CC is non-op at this time. If the non-op condition is hardware related, I didn't observe modified behavior during the last test drive. Unfortunately, I was not considering this aspect at the time, and could have easily missed something.
Regards
CalG
CalG
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