Thread: L322 TORQUE CONVERTER

I'm not sure on what speed, but you can reset your gearbox ECU and most times people find it makes a good improvement.

Get in, and press the accelerator to the floor and keep it down
key in the ignition
turn the ignition to stage 2 ( all the dash lights up )
DONT START IT ... just leave it there whilst you have the pedal to the floor
wait a while ( 60 seconds )
ignition off
key out
pedal up.

come back to it in a few minutes and see if it drives better.l

Laurie

Laurie,

where did you get this routine from? Never heard it before...

Cheers

When I was researching info on the GM 5L40E gearbox and it's problems, I found references to it on Fullfatrr.com and RangeRovers.net. When I find tit-bits like that, I save them to a reference folder on my computer.


Laurie

Ahh it's for the GM TD6 box. I have the ZF V8 box. Probably why I hadn't read it before....

It should work for either the ZF or the GM box according to what I've read. RangeRovers.net has many references to it and they only have the V8 in the 02-06 Rangies in the USA.

Laurie

Thanks all. The trick about resetting gearbox computer seems to work ok on my TD6, but the original question still remains. At approx. what speed should the torque converter lock up and is this programable? Mine locks up at 80k/h but trying to drive at 60k/h is painful as the box constantly kicks back to 3rd and the engine revs unnecessarily. It wont pull in top under about 80k/h. Any thoughts? Jim

That's about what mine does. If I'm driving it around town, I will generally put it in sports mode, as it seems to find a more appropriate gear like that.

As best I can determine the TC does lock up at about 60kmh with only a light load on the transmission. For example, heading along a straight, flat section of road.

We have a very steep hill close to home here and while the transmission will sit in third, TC unlocked, and reasonably high rpm (2500+) while climbing as soon as I level out it shifts up to fifth and locks up the TC. It's a 60kmh zone that drops fairly soon to a 40kmh school zone depending on time of day. Even in manual mode it doesn't seem to be coerced into behaving differently.

I find on the highway it locks the TC at around 80kmh (or perhaps a smidge over) and is reluctant to unlock unless provoked i.e. hard throttle press - kickdown scenario.

Between 60kmh and 80kmh seems to be a grey area. The TC can lock but may not depending on style/activity. Beyond 80kmh it definitely locks up. Below 60kmh it will not lock up.

I haven't found anything that suggests that this can be programmed differently. This, like lots of transmission stuff, is influenced by inputs from lots of other ECUs about the car so is setup that way to provide the most generic solution IMHO.

Hope that helps some Jim.

Cheers,
Iain