Transfail safe still engages ?

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philip pickard

philip pickard

Active Member
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239
Location
doncaster
hi there and thanks for any replies.. well after a bad weekend and a long slow drive in failsafe mode.i have now changed the stepper motor on the advice of the people who reconed my gearbox. it still goes into trans failsafe mode after driving a few miles!! im at a loss to what it could be im going to take the car to the gearbox people in the morning but i would like an idea of what it could be so i can think of what to fire back at the guys who reconed my box i did tell them last month that the box didnt like going back down into fist as i stopped at the junction it jerked a little going down the first as i stopped. then one day the jerking stopped and the trans fail safe started coming on. now i took it to the gearbox people and they put it on the diagnostic machine and said it needs a stepper motor and they also said they had reset the valve body in the gearbox so. here i am its still going into failsafe? i chaged the stepper motor could the problem still be the stepper cause it is a reconed motor could the motor be no good im at a loss. could the problem be the trasfur box maybe the chain needs changing cause its streched any advice would be a help thanks phil
 
philip pickard said:
hi there and thanks for any replies.. well after a bad weekend and a long slow drive in failsafe mode.i have now changed the stepper motor on the advice of the people who reconed my gearbox. it still goes into trans failsafe mode after driving a few miles!! im at a loss to what it could be im going to take the car to the gearbox people in the morning but i would like an idea of what it could be so i can think of what to fire back at the guys who reconed my box i did tell them last month that the box didnt like going back down into fist as i stopped at the junction it jerked a little going down the first as i stopped. then one day the jerking stopped and the trans fail safe started coming on. now i took it to the gearbox people and they put it on the diagnostic machine and said it needs a stepper motor and they also said they had reset the valve body in the gearbox so. here i am its still going into failsafe? i chaged the stepper motor could the problem still be the stepper cause it is a reconed motor could the motor be no good im at a loss. could the problem be the trasfur box maybe the chain needs changing cause its streched any advice would be a help thanks phil
Click to expand...
i have changed the battery and the stepper motor so i now think its a seal in the gear box although i have been told the seal and drum on the clutch A has been changed when they reconed the box in august. i dont wish to argue with my gearbox garage. but other than this problem being a sensor in the box. it has got to be a seal because i drive for about 10 mins and it goes into limp mode every time so i think the oil is thick when cold but when it goes to temp it goes thinner forcing oil past a seal some where. or could this be a oil cooler problem??
 
Take it back to them. Tell them the gearbox isn't right. It need's to be fixed. Also explain to them that after a certain time, three or four days you will be hiring a vehicle that they will be paying for.
 
I had exactly the same problem with a gearbox that had been reconditioned. It had only done about 3500 miles and started putting up 'trans fail safe prog' and locking into a high gear. I sent it back and the company admitted that they had nicked a seal when they re-assembled the 'box. I am in the process of taking legal action to recover the cost of removing the 'box, sending it to them, getting it back and re-fitting it, so I don't want to disclose who they are at the moment but they are not a million miles from you. Who did your 'box?
 
Unless you have some form of telepathy going with your RR I would plug it back into some diagnostics before you replace the whole vehicle a bit at a time :)
 
I took the RR back to the lads who re-coned my box. when it went into trans fail safe, they plugged it in and told me what was wrong and the codes. i changed the stepper cause it was showing a noise on it. the code then went after the change.but a low electricfault showed so i changed the battery. now thats clear to.if it still does it darren the gear box fixer said bring it back weds tomorrow and he will deal with it then. i trust darren and his workers, as he recons hundreds of boxes a month. i do have my own little garage that my mechanic repairs vehicles so i dont have the same costs as most people. but still have to think of money when finding faults.. Darren said its unlikely to be the A clutch as he has changed it for a new type not the same as the old type what was in it. but i i myself think hes wrong and i think there is a seal popped some where? or could the box cooler be the problem not the gearbox it self?.i have come across allsorts of problems with RR but these gear box problems can be very costly for alot of people. im lucky i can take things apart most of the time plus im in the trade so i get things cheaper but as i said if you havent got a workshop or my contacts its alot of money thrown at the RR so if i can save people moneyand explain this type of problem out to others with a cure. it may help save money for some one and they can cut out loads of time getting straight to the problem so ill keep you all posted.Thanks for replies.
 
Is the high low shift working ok with the new stepper motor ?

I wouldn't suspect the transfer box, chain or otherwise.

Could be a worn valve block / solenoid as this is often overlooked when reconditioning the transmission.
If you want to search RRPhil or Bemble and ZF5HP24 then there is a world of information out on the interweb, if you can contact him he actually runs a business reconditioning the transmissions and can check the valve bodies.
 
I don't know what it is with these L322 gearbox's. These are the weak point on this model range rover. They don't seem to repair very well or there's a serious lack of knowledge in the industry. My own 322 had three gearbox's by the time it hit 100k miles.
 
My ZF transmission in my 04 petrol had a rumbling torque converter and a leaking rear seal and a friend and I gave it a refresh with refurbished torque converter around 12k miles ago and it is still going strong and we did it under the supervision of Bemble / RRphil and he also tested the valve body. The GM in the diesel suffers from a weak valve block causing the torque converter to lose pressure which then rapidly wears but unlike the ZF when the TC fails it sends metallic debris through the transmission killing it and quite often when the transmission is rebuilt the valve body isnt and then the low pressure causes the Tc to wear out again quickly killing the complete transmission again.
The shift motor in the NV transfer box is another weak link as when that starts to fail it feeds all sorts of weird message into the canbus system.
The other problem with the ZF certainly is the general industry will fill the transmission with the incorrect fluid which just doesn't work correctly rendering a potentially satisfactory refurbishment useless.

i am only recalling the work and knowledge of bemble / saintv8
 
philip pickard said:
Darren said its unlikely to be the A clutch as he has changed it for a new type not the same as the old type what was in it.
Click to expand...

Something not quite right there. The stiffened/strengthened A-clutch drum was introduced across the whole 5HP24 model range in November 2000 at transmission serial number 355863. The first ‘032’ (i.e. L322 Range Rover) model of the 5HP24 rolled off ZF’s production line in Saarbrucken on 17th January 2001, serial number 370261.

All Range Rover ZF 5HP24 transmissions were therefore fitted with the upgraded A-clutch drum from the factory.

Phil
 
well i sorted it. it was a loose connection on the plug to the stepper motor. so i bought a new sleeve bit that turns round and locks the plug in place and its fine now. it was showing low volts on the red wire so when i pushed the plug upwords it got a stronger voltage. so i taped the wires up tight and the trans fail safe stayed off longer this time and i tested the voltage it was stronger so i put new coller onto plug and it fits tight onw its fine. so gearbox was ok in this instance. but it could of been some thing else quite easy. thanks for replies people. phil
 
That sounds like a bit of a relief , not the doom and gloom you were expecting, a result:):)
always worth checking the simply things first, wonder how many people just send it in to garage and get a big bill for work not needed .
 
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