Thread: Auto Box question ? Can you program the box ECU ?

IMO first of all better put new oil and filter in it to be ruled out and run a stall test to rule out a mechanical issue then if it passes the test think to ECU things, afaik the only thing you can do to the EAT ECU is to reset addaptive settings not to alter them, an engine management remap would be the good move if you want "cojones"

The other thing to check is the condition and output of the airflow meter. This helps calculate an engine load signal to the trans ecu basically. Shift points can be all over the show if it is out to lunch...

Jc ☺

It is a stupid box, it really needs an extra gear or 2 to keep in the correct rev range. You eventually learn how to drive it to get it to behave, but it's unlike any auto I've ever driven, definitely not as good as a Jap box.

Funny you should not mention the fact that on hills at 60 kph plus the trans will lock up in third after a short time and not drop out until under 50.

On the flat it will lock up over 70kmh in third and drop out at 60kmh.

Even if you are in D it will do this. Maybe you are not allowing it the few seconds it needs.

If anything I find while towing my camper that it holds 3 lock too long causing speed loss, then it has to drop to second.
All in all I now find it as good a box as you could have with only 4 speeds as the locks provide 2 extra gear ratios.
It took me a long time to fully understand how it works but now that I know I find it adequate .
Regards Philip A

new box new filter new oil ,,

Originally Posted by CU55TM Disco

It is a stupid box, it really needs an extra gear or 2 to keep in the correct rev range. You eventually learn how to drive it to get it to behave, but it's unlike any auto I've ever driven, definitely not as good as a Jap box.

Our Tickford fairlane has the ZF4-HB22 and its crap also ,,,, up down ,,never knows what gear to be in ,,,

even a TH350 or a 727 toque flight 727 would have been a better box from the 70`s .
i had a 727 in a 245 ci inter scout was the smoothest box i have driven ,

I hope when i do a ECU remap it will help things out a bit ,,, yesterday went up the same hill 4 times at the same speed ,,
never the same gear

I remember seeing a gearbox aftermarker ECU some where ,,just cant remember where ,, maybe an ashcroft ??

Originally Posted by PhilipA

Funny you should not mention the fact that on hills at 60 kph plus the trans will lock up in third after a short time and not drop out until under 50.

On the flat it will lock up over 70kmh in third and drop out at 60kmh.

Even if you are in D it will do this. Maybe you are not allowing it the few seconds it needs.

If anything I find while towing my camper that it holds 3 lock too long causing speed loss, then it has to drop to second.
All in all I now find it as good a box as you could have with only 4 speeds as the locks provide 2 extra gear ratios.
It took me a long time to fully understand how it works but now that I know I find it adequate .
Regards Philip A

"Even if you are in D it will do this" I'm not sure whether this is true but certainly you get lock up in third when the gear shift is in third as you say. I agree it's a good box once you get to know it but I think it is important that all sensors etc are working correctly for it to perform well.
Nick

Since fitting the Ashcroft HD torque converter I find the automatic transmission on my TD5 to be great.