Zf Slipping

[JETURBO]

Good stuff mate

What method did u use to flush the box out ?

In the past ive used the full 20ltrs doing drop,fill,drop,fill etc etc

[TER80D]

Good stuff mate

What method did u use to flush the box out ?

In the past ive used the full 20ltrs doing drop,fill,drop,fill etc etc

We had access to a hoist that made the process a hell of alot easier but the method we used was:

1. Drop the pan and dump all the oil into a bucket (messy as hell)

2. Install new filter and gasget. Clean the pan and wipe off excess clutch material from the two magnets in the bottom and replace the pan by torquing up the bolts in a specific sequence to 12nm +- 1nm (Need a small torque wrench as most big ones don't go this low)

3. Disconnect the outlet oil pipe going from the gearbox to the heat exchanger at the heat exchanger end and connect it a long piece of clear tubing going into a bucket

3. Pump as much Syntrans in through the filler hole until it starts coming out the filler hole

4. One person then starts the car and puts it through the gears while the other person is pumping trans fluid in at about the same rate as it's coming out. Buckets that are at least partially transparent help here. We also had a pump unit that screwed directly onto the cap thread of the Syntans bottle making it easy

5. Once the oil flowing out of the outlet through the clear pipe is a constant red colour the same as the Syntrans, stop the car, reconnect the oil outlet pipe from the ZF back into the heat exchanger and then pump a little more oil in

6. Depending if the oil temp is still below 40 degrees you can then proceed to run through the filling procedure in the PDF from the link at the bottom and do a final level check. If the temp is too high, wait for a while to allow oil to cool down and then do final level check

Doing it this way I pretty much used up the entire 20L drum and had all of a litre to a litre and a half left over but I did let it run for a couple of litres after the fluid coming out was a constant red to ensure a good flush. For the temp sensing I borrowed a laser thermometer from my old man and it made the final level check easy.

All up it took about 5 hours to dump the coolant, flush the box, replace the heat exchanger, fill coolant system again and then take it for a test run. One ridiculous thing was that the steel pan fitted to my car has no drain plug so the only way to drop the oil at the start is to drop the pan full of oil and unless you have a huge catch pan, oil goes everywhere.

https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&ved=0CD8QFjAB&url=http%3A%2F%2Fwww.xoutpost.com%2Fattachments%2Fx5-e53-forum%2F35525d1249245178-help-fluid-fill-tranny-04-4-4i-index-zf-traans.pdf&ei=9pIXUYr-NOWfiAfPx4A4&usg=AFQjCNEi9bzS8u6pLM1kSih1DmFDz0E_AQ&bvm=bv.42080656,d.aGc

[JETURBO]

Yeh mate the steel pans do not have drain plugs so its messy work dropping the pan two people minimum job hey

Good work u done it perfict , hows the " issue " u had all gone now ?

[rednose]

Yeh mate the steel pans do not have drain plugs so its messy work dropping the pan two people minimum job hey

I think the BMW ones may have a drain plug, so this may be of interest to anyone swapping out from a plastic pan to a metal pan.

Edited 10/02/13 11:48 PM by rednose

[TER80D]

Good work u done it perfict , hows the " issue " u had all gone now ?

I've only driven it twice since and it's much better. Ride is smooth and the shifts are barely even noticeable now whereas before they were getting harsher and harsher. The rocking feeling is gone and time will tell if the lurch that I experienced once is now gone too.

[JETURBO]

The lurch into first gear is a " typical" zf characteristic u cant shake that issue it factory even in jaguar and bmw zf's

[TER80D]

Yeah, I've learnt to live with that one. What I had was driving at about 30km/h and it started almost bunny hopping as though I was pushing the clutch in and out really quick causing it to drop about 10km/h in speed each time.

As a side note, BMW did issue a software update to resolve the harsh 2 - 1 shift but apparently makes the 2 - 3 shift sloppy lol. Such genius German engineering but they just can't get the software right. Must be running Windows or something

[JETURBO]

Hahaha MS DOS zf lol

[SCTC]

Hey Guys,

finally tested a new torque converter for the ZF in a G6 (Bruce Heinrich) I have one for sale in the classafides,

similer mod I did for Gilly's BA , so will perform extremly well.

VStrong

Super Charged Torque Converters ™

[AirStrike]

What does this have to do with the thread? Maybe talk to site admin about sponsorship rather then spamming your crap everywhere.