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Omega Help Area => Omega General Help => Topic started by: CBH on 07 April 2009, 21:55:14

Title: auto box problem
Post by: CBH on 07 April 2009, 21:55:14
Started the car to come home after work and put it in 'R'
The box took a long time to engage the gear
Put it drive and again it took sometime to engage.
On the drive home the gears were not engaging and the RPM short off the scale twice.
Got home 40 miles in manual mode with the "Automatic Gearbox" on the display.
Just spent an hour getting the car level on stands and check the level.
It needed 200ml to bring to the filler plug.
Took the car for a quick drive 5 miles and the gears changed no problem.
being short of 200ml does not explain the problem on the drive home.
Any ideas
cbh
Title: Re: auto box problem
Post by: unlucky alf on 07 April 2009, 21:58:23
perhaps its time to give it a complete fluid change & filter clean, has worked for others in the past :y
Title: Re: auto box problem
Post by: feeutfo on 07 April 2009, 22:01:07
Quote
Started the car to come home after work and put it in 'R'
The box took a long time to engage the gear
Put it drive and again it took sometime to engage.
On the drive home the gears were not engaging and the RPM short off the scale twice.
Got home 40 miles in manual mode with the "Automatic Gearbox" on the display.
Just spent an hour getting the car level on stands and check the level.
It needed 200ml to bring to the filler plug.
Took the car for a quick drive 5 miles and the gears changed no problem.
being short of 200ml does not explain the problem on the drive home.
Any ideas
cbh
I would say it does mate, its fixed.

would suggest servicing the box to be safe, ie change the atf and clean or swap filter. It will probablly  have over heated the fluid. any leaks?
Title: Re: auto box problem
Post by: CBH on 07 April 2009, 22:05:00
No leaks
The fluid was changed about 20k ago when I changed the front seal and bush, but I must admit I did not change of clean the filters.
How much approx are new filters?
I assume I can just drop the Gearbox sump to change them
cbh
Title: Re: auto box problem
Post by: unlucky alf on 07 April 2009, 23:20:55
i dont know how much the filters are but could contact JPAT as i think they do them, what colour was the atf when you checked the level? & i trust you used dexron III, i say this because some hand books [like mine] lists dexronII but in fact should be dexronIII, i hope that makes sense :y
Title: Re: auto box problem
Post by: Darth Loo-knee on 07 April 2009, 23:47:48
Depends where you get the filters from to how much they are I suppose. I get mine from a guy on ABS (autobahnstormers) for £40 thats for sump gaskets and gearbox filter. You will then nneed about 7.5 litres of DexIII gearbox oil :y
Title: Re: auto box problem
Post by: feeutfo on 08 April 2009, 00:06:41
Quote
No leaks
The fluid was changed about 20k ago when I changed the front seal and bush, but I must admit I did not change of clean the filters.
How much approx are new filters?
I assume I can just drop the Gearbox sump to change them
cbh
Have you seen the top up procedure in maintenance guide section? link below, do you think the level was correct after the work done? just trying to explane the missing 200mill. But fairly sure that would explane the symptoms tbh

vx filters are almost £70 luckily i got several parts at the same time so having spent a wedge they where happy to llet ma take it back if i didnt need it. When removed it was in good nick so i just cleaned the old one and took the new one back. two sumps with gaskits, filter is in the big one with level plug.

Edit to add; its a bit of a gamble which yhou do, other suppliers are cheaper but will they take it back if not needed
Title: Re: auto box problem
Post by: CBH on 08 April 2009, 11:23:51
I drove the car to work today (40 miles) and as I got towards the end of the trip I had problems pulling away. The auto appears to be slipping in 1st but once on the move the box worked ok and I could use kick down. Is this a low fluid problem, I may have lost some on the way to work or could it be temp related, not working when hot?
cbh
Title: Re: auto box problem
Post by: Marks DTM Calib on 08 April 2009, 11:42:12
It woulr be worth re-setting the brake abnd....but thats a sump off job.
Title: Re: auto box problem
Post by: CBH on 08 April 2009, 11:48:48
I am going to take the sump off over the weekend to do the filter.
How do you do brake band ajustment on the old BW35/65 boxes it was done using a torque wrench.
cbh
Title: Re: auto box problem
Post by: Jimbob on 08 April 2009, 12:10:57
Mine is suffering very similar problems.

Top ups just cause mucky fluid to run out.

Havent yet tried adjusting brake band, need 5nm torque wrench.

Not sure I am accurate enough for the job.

could also be thrust washer.

Mine drops out every few days now.


Seriously thinking about getting a new box.

Think I have access to someone who has swapped many boxes and has a lift  :D
Title: Re: auto box problem
Post by: CBH on 08 April 2009, 13:15:06
I assume I just take the sump off as there is no drain plug, and get a lap full of Trans fluid.
 ;D
Title: Re: auto box problem
Post by: Jimbob on 08 April 2009, 13:20:46
Quote
I assume I just take the sump off as there is no drain plug, and get a lap full of Trans fluid.
 ;D


If you undo one side, but loosen the other, you can sort of slosh most of it out
Title: Re: auto box problem
Post by: CBH on 08 April 2009, 13:36:50
Is there a "how to" for brake band ajustment, I have a  torque wrench
that can go to 5nm. looks like I am going to have a fun easter weekend, because it's almost undrivable at the moment.
Title: Re: auto box problem
Post by: Jimbob on 08 April 2009, 13:40:05
Quote
Is there a "how to" for brake band ajustment, I have a  torque wrench
that can go to 5nm. looks like I am going to have a fun easter weekend, because it's almost undrivable at the moment.


No, but I have received this advice :


http://www.omegaowners.com/forum/YaBB.pl?num=1237563888


I shall await your results with interest  :y

and will look forward to readnig your how2 ;)
Title: Re: auto box problem
Post by: CBH on 08 April 2009, 13:45:25
Thanks Jimbob I will give it a go, and if I can find my old digital camera I will post some photos.
cbh
Title: Re: auto box problem
Post by: CBH on 10 April 2009, 14:51:13
It's dead
The Gearbox die on the way home from work yesterday, there is no forward drive but it still has reverse.
Having look into the working of the box, there is two sets of clutches one for forward and one for reverse,
so it appears the the forward set of clutches have failed and I will have to replace the box as cleaning the filter and new fluid is not going to fix this.
Any tips on changing the box gratefully received.
cbh
Title: Re: auto box problem
Post by: CBH on 10 April 2009, 22:28:19
Ok got most of the bits off and the next thing is to unbolt the box and drop it down but before I do that how heavy is it.
I have a trolley jack under it but once it's under the car I need to move it into the garage, is it two man lift?
Title: Re: auto box problem
Post by: bbacon on 11 April 2009, 03:28:09
I am very interested to hear your results as I have had the same problem with my 3.0 V6.  I have been given the advise that it may be a solenoid as well as the band adjustment.  
We can both keep our fingers crossed it is not the bearing.

Cheers,

BB
Title: Re: auto box problem
Post by: albitz on 11 April 2009, 07:03:13
Quote
Ok got most of the bits off and the next thing is to unbolt the box and drop it down but before I do that how heavy is it.
I have a trolley jack under it but once it's under the car I need to move it into the garage, is it two man lift?
It is VERY heavy,you need 2 of you mate,I would estimate at least 50kgs.I tried it with a trolley jack,it fell off the jack before it was fully lowered and landed on my hand.Still got the scar but was very lucky not to have broken bones.
someone needs to hold it steady while you slowly maneouvre the trolley jack and slowly lower it. :y
P.S. presumably you have removed the torque converter bolts? ;)
Title: Re: auto box problem
Post by: Tonka. on 11 April 2009, 09:41:52
I strapped mine to the jack with luggage straps and wooden blocks to keep it level. Then brought it out through the front of the car.

The AR35 went back in the same way. :y

Yes it is bloody heavy.  :o
Title: Re: auto box problem
Post by: CBH on 11 April 2009, 21:18:17
Got the sump off to drain the fluid and found it full of bits of metal and metal dust as if someone had used a grinding wheel.
So this gearbox is no more and I need a good 2nd hand unit, I will start looking after Easter.
cbh