Puede que tengas fastidiado uno de los multiples embragues....DEsde luego no es normal...bajar si que baja a 2ª ...si seleccionas la D que pasa que no sale el coche o que sale como si estuviera en 2ª???

vamos a ver...llevo 2 dias investigando en las webs..........

y creo q algo he encontrado..pero yo soy de la escuela clasica........"français" lo del ingles pa ligar y pedir copas y poca cosa mas.....

We have recently (now July 05) made 2 considerable advances in our ZF autoboxes.

A common problem with all ZF 4HP22/24 boxes is the failure of the one way 'sprag' clutch. Once the cams in this one way sprag clutch 'flip' the unit will slip both ways resulting in the vehicle only pulling off with the shifter in position '1' not 'D' and driving OK when shifted up to position 2,3 and D until you stop then you need to pull it back to '1' to start off again. It is not feasible to change this unit in each rebuild as this one part is approx £ 400. By disassembling the 'sealed unit' we were able to examine the profile of the cams and understand how they work, from here the challenge was to find another cam from another type of autobox that would fit and had the correct profile to make the unit stronger by not allowing the cams to flip. After quite a lot of searching we found one, 're-cammed' some of these clutches and thoroughly tested them, we have not had one fail since. This is an example of how we are able to use our engineering background to understand a problem and cost effectively make the unit stronger without having to raise our prices.

We have also recently invested £ 20,000 in a 'Hydra-Test' machine. This machine allows us to do 2 things. Firstly once the valve body has been rebuilt we are able to fit it to a plate on the test rig and run the valve body through its cycle with 45 deg pre-heated oil to simulate as close as we can get to 'real world conditions' The hydraulic valve bodies are run through manually by winding a valve to simulate the governor increasing in speed and various pressure gauges are monitored to see that the valve body is applying the correct clutches at the correct pressures. When testing the electronic ZF valve bodies once the solenoids are all tested this cycling procedure can initially be run through manually to check all is well then the computer can run up to 100 full run cycles going from 1st, 2nd, 3rd, 4th and lock up down to 1st again to ensure no valve are sticking and the solenoids are not failing when hot and working hard.

We are also able to fit a test plate to the autobox in place of the valve body and apply heated oil at pressure to check we have no leakage or pressure drop on any of the clutch packs.

This machine has enabled us to improve the quality of our boxes by identifying any potential faults or problems before the box reaches the customer.

If you are running a high performance engine it is possible to upgrade the internals of the 4HP22 to the 4HP24, please note the box will be 15mm longer due to the thicker pump assembly. The price of these boxes is £ 1150 + VAT exchange.

Alguien me saco algo en claro???

cuanto me va a costar la broma? que tengo q hacer???

Gracias por the traslation service y sobre todo por las instrucciones pa burros.......

se me puede contactar por mail para lanzarme un cable o bien por telf prara aclararmelo. NEcesito el coche pa irme al valle de Aran a pisar nieveeeeeeeeeeeeeeee!!!!!!!! seis seis 7 seis 7 siete 7 dos 5

Pq. no pruebas con un traductor on-line.......... 😈

ya lo hice pero la lectura es compleja y no me queda claro nada.......

hay q enviar la caja a UK? envian la pieza aqui para q yo la cambie? cuanto cuesta? es mas barato comprar una caja de intercambio? cuanto?
etc etc

sigo clavado.........pleaseeeeeeee

Hola SuricataBcn
Lo que te pasa me suena a problema con los discos de friccion de la trasmision, si es asi, no te queda mas remedio que desmontar la trasmision completamente y mi recomendacion es que no se lo dejes desmontar a cualquiera tiene que ser alguien que sepa donde mete las manos, en madrid hay un taller especializado en cambios automaticos, pero no me acuerdo del nombre, quizas alguien del foro te pueda ayudar, (tambien hacen intercambio de trasmisiones).

Espero haberte sido de ayuda
Un saludo 😉

Yo apostaria a que ha muerto el convertidor de par.
Desmonta la caja y llevala a reparar.

hola,

La caja lleva un filtro de aceite en el interior, debe sacarse el carter de la misma para acceder a el y cambiarlo, cuando ese filtro se obstruye suele dar el problema que dices.

saludos

Joan

Gracias a todos, lo del filtro toca este fin de semana........cruzo los dedos!!!!! pq la ostia sino puede ser considerable.

Ando liadisimo de curro y cin un mono de 4x4 extremo que ni os imaginais......

En cualquier caso, hemos comprobado a priori el nivel del liquido hidraulico y la presion de trabajo segun indica el workbook y todo parece correcto, el finde desmontaré el carter y cambiaré el filtro

Seguiré informando

hola,

La caja lleva un filtro de aceite en el interior, debe sacarse el carter de la misma para acceder a el y cambiarlo, cuando ese filtro se obstruye suele dar el problema que dices.

saludos

Joan

Este chico es un crack, todos pensando ya en "tirar" la caja y mira...

Si no estuviese mas solicitado que un ministro en elecciones, le pedia que fuese moderador... 😀