2.9 v6 Scorpio Estate , Gearbox problem ?!?!?
Discussion
My dad owns a 2.9 granada scorpio estate and he told me to go gt sme advice on his car , so i found this site , anyway when he is traveling at about 80 mph he's doing about 3500-4000rpm and this is costing allot of petrol because its not going into final gear (4th) could you lend me and my dad a hand if u have any ideas !
cheers
cheers
kona2112 said:
My dad owns a 2.9 granada scorpio estate and he told me to go gt sme advice on his car , so i found this site , anyway when he is traveling at about 80 mph he's doing about 3500-4000rpm and this is costing allot of petrol because its not going into final gear (4th) could you lend me and my dad a hand if u have any ideas !
cheers
cheers
Has he checked the fluid levels in the auto box? I would imagine that if it isn't that then it will be a garage job to see why the lock-up isn't working.
The fact that the vehicle moves indicates the oil level is about right. However use the dipstick to see a sample of oil, if it is black and smells like cat pee then you are in trouble - a friction element has burnt out and a rebuild is needed.
Assuming that the oil is just a dark reddy brown the best thing to do is have the Ford dealer check to see that the signal to shift into overdrive gets to the gearbox, and then to see what the gearbox does. It may well be the case that the gearbox saw excesive slip engaging overdrive and just doesn't command it anymore as part of the self protection strategy. Resetting the codes will then enable the dealer to measure pressures and see what is going on.
It may well be the case that a simple repair external to the gearbox is needed - don't jump to conclusions because that's expensive.
I would caution you to use a dealer, not an independent, you're paying for diagnosis at this stage, when the dealer shows the gearbox is bad and the economical fix is a rebuilt unit is the time to look at who offers the best deal on replacement units..
Assuming that the oil is just a dark reddy brown the best thing to do is have the Ford dealer check to see that the signal to shift into overdrive gets to the gearbox, and then to see what the gearbox does. It may well be the case that the gearbox saw excesive slip engaging overdrive and just doesn't command it anymore as part of the self protection strategy. Resetting the codes will then enable the dealer to measure pressures and see what is going on.
It may well be the case that a simple repair external to the gearbox is needed - don't jump to conclusions because that's expensive.
I would caution you to use a dealer, not an independent, you're paying for diagnosis at this stage, when the dealer shows the gearbox is bad and the economical fix is a rebuilt unit is the time to look at who offers the best deal on replacement units..
Gavin is correct as always, torque converter lock-up is going to be an electronic signal and nothing really to do with trans fluid levels. The transmission will have an input shaft speed sensor and an output shaft speed sensor that the dealership can monitor with their diagnostic equipment and be able to tell if to much slippage is occurring inside the trans and if the torque converter lock-up is occurring.
Hi Again , thanks for the advice i will tell my dad once he gets back from watching the football ! i have read up and would it be somthing to do with the brake band adjustment? just a thought ? Also the procedure you have advised me to take is it expencive to get a diagnosis done at a ford dealer and for them to reset the codes?
By the way i have checked the fluids and the auto transmission fluid is higher than it is supposed to be? would this have an effect as to why its not going into 4th?
Thanks again , Dan
By the way i have checked the fluids and the auto transmission fluid is higher than it is supposed to be? would this have an effect as to why its not going into 4th?
Thanks again , Dan
the vehicle speed sensor (vss) at the rear of the box is the problem and is a very common fault
it will cost you about £35 to buy from ford.
it will take approx 30mins to fit, its a one bolt item with a multi plug on it.
you will also notice that the fuel computer isnt working correctly either.... it runs off the same sensor
hope this helps
it will cost you about £35 to buy from ford.
it will take approx 30mins to fit, its a one bolt item with a multi plug on it.
you will also notice that the fuel computer isnt working correctly either.... it runs off the same sensor
hope this helps
kona2112 said:
Hi Again , thanks for the advice i will tell my dad once he gets back from watching the football ! i have read up and would it be somthing to do with the brake band adjustment? just a thought ? Also the procedure you have advised me to take is it expencive to get a diagnosis done at a ford dealer and for them to reset the codes?
By the way i have checked the fluids and the auto transmission fluid is higher than it is supposed to be? would this have an effect as to why its not going into 4th?
Thanks again , Dan
By the way i have checked the fluids and the auto transmission fluid is higher than it is supposed to be? would this have an effect as to why its not going into 4th?
Thanks again , Dan
It isn't expensive - to do the work will take under an hour for most dealers but the thing to stress is that if the problem is the harness (and believe me I have seen plenty of harness problems) then all the gearbox replacement in the world won't fix the problem. Plus it will be expensive.
As regards checking the fluid the levels on the dipstick rely on checking at a certain temperature with the engine running, having engaged each gear for several seconds and checking in Park. It isn't uncommon to misunderstand how to check fluid levels and many people get it wrong.
When you have a very low fluid level the pump cannot suck fluid in to activate any clutches, so the vehicle won't move.
If the fluid level is very high the fluid rises by expansion then gets churned up and froths. It cannot generate enough line pressure to keep the clutches engaged and you get slip. But in all other respects function is normal, so you would get 4th gear.
As for the issue being a vehicle speed sensor, many cars will use a surrogate signal from the ABS sensors from the driven wheels, so it is unlikely that this is what is causing the issue.
To my mind it is potentially a burnt overdrive band or clutch, an electronic signal fault preventing the O/D from working or the solenoid in the valve body isn't getting fluid to the O/D.
The above is simple to diagnose with main dealer kit and a lot cheaper than transmission replacement.
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