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[Field Marshal Dr. Opti]

OK....so she changes up smoothly and quickly through the AF40 ZF6 before selecting top gear (6th)

Roundabout approaching so she drops down smoothly and silently through the gears to 3rd. Perfect.

Gathering speed again she refuses to change up, steadfastly remaining in 3rd gear.....even using the box manually she will not shift gear.

I know some mention an AFT change but the gearbox is otherwise so smooth I have my doubts that this is the problem especially as I recently found documentation that the ATF was replaced just before I bought her....around 40,000 miles ago.

Software problems?....something else perhaps.

Thing is, I don't want to spend a fortune trying this and that because despite being a 'future classic'    she is probably worth less than a large Mars bar and family sized bottle of coke.

[ronnyd]

Just part of a 'classic' meal deal then.  Jokes aside hope you sort it soon.

[Field Marshal Dr. Opti]

Just part of a 'classic' meal deal then.  Jokes aside hope you sort it soon.

Last time she did it was about 6 months ago, Ronny.

MOT this week.

[cam.in.head]

is it like the omega ,where you can just swap the gearbox ecu without any programming as such ?
or does the current one have any codes ?

[Field Marshal Dr. Opti]

is it like the omega ,where you can just swap the gearbox ecu without any programming as such ?
or does the current one have any codes ?

No warning lights, and no codes using a Maxiscan MS509......although I'm not sure if this detects gearbox faults.

Engine gets very hot when stuck in 3rd gear.

[Migv6 le Frog Fan]

£100 including delivery. Your first offer is often your best offer. 

[dave the builder]

£100 including delivery. Your first offer is often your best offer. 

2nd offer £75 including delivery*

* as long as you cover the Signum up with dust sheets to hide the ugliness once delivered, until i can rob it of parts and scrap it 

[Sir Tigger KC]

£100 including delivery. Your first offer is often your best offer. 

2nd offer £75 including delivery*

* as long as you cover the Signum up with dust sheets to hide the ugliness once delivered, until i can rob it of parts and scrap it 

So cruel.... 

[amba]

Sounds like a sticking shift solenoid or similar.
Always worth ATF and filter change as given the few miles you obviously cover the gearbox will thank you and may well be the fix given nothing else has changed.

[cam.in.head]

is it like the omega ,where you can just swap the gearbox ecu without any programming as such ?
or does the current one have any codes ?

No warning lights, and no codes using a Maxiscan MS509......although I'm not sure if this detects gearbox codes

i use the same scanner and it shows gearbox codes on the omega so should on yours ?
looking on ebay there are a few ecu's for around £30 if they can be plug and play ?
just a thought

[Rangie]

If it were mine I'd definitely go for ATF & filter change as the first option, many folk on the RR site have experienced similar problems & it seems that in the majority of cases it does the trick.

[BazaJT]

Don't know anything of the Signum[other than they're ugly ]but I'm not so sure a gearbox filter change is possible without pulling the 'box and stripping it down? A change of ATF is of course doable with the 'box in place either by flushing it through in one go or as many think is the better option several "sump dumps" over several hundred or so miles.

[Field Marshal Dr. Opti]

£100 including delivery. Your first offer is often your best offer. 

Far cough.

[dave the builder]

£100 including delivery. Your first offer is often your best offer. 

Far cough.

I'm removing my offer of £75 from the table   
try webuyanyuglycar.com 

[Doctor Gollum]

£100 including delivery. Your first offer is often your best offer. 

Far cough.

I'm removing my offer of £75 from the table   
try webuyanyuglycar.com 

They only buy cars that they can sell...