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Omega Help Area => Omega General Help => Topic started by: prestigesec on 28 April 2008, 14:27:06

Title: Gear box or diff?????
Post by: prestigesec on 28 April 2008, 14:27:06
Hi when pulling off from a junction car occasionally gives a bit of a thud from the back and sometimes revs but doesnt move then all of a sudden feels like it catches a cog and thuds and moves off again all other gears are fine not sure whether this would be diff or gearbox. What you guys think and how much to fix and how hard is the job? Many thanks in advance for help.
Title: Re: Gear box or diff?????
Post by: Jimbob on 28 April 2008, 14:28:23
Not brakes sticking is it?
Title: Re: Gear box or diff?????
Post by: prestigesec on 28 April 2008, 14:30:37
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Not brakes sticking is it?

Doesnt feel like it no but when it kicks in tc light does flicker but thought this prob down to catching at high revs and its wet here at the moment.
Title: Re: Gear box or diff?????
Post by: Ironingboard on 28 April 2008, 14:47:38
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Hi when pulling off from a junction car occasionally gives a bit of a thud from the back and sometimes revs but doesnt move then all of a sudden feels like it catches a cog and thuds and moves off again all other gears are fine not sure whether this would be diff or gearbox. What you guys think and how much to fix and how hard is the job? Many thanks in advance for help.

I get the thump when I boot my car when I move it out of reverse. I'm waiting for some good weather so I can take off my exhaust heat shield and see if my prop mount is away. I heard from someone else on oof that their prop mount was away, same age and engine as my one. Its my only option since I had everything else checked out.
Title: Re: Gear box or diff?????
Post by: Kevin Wood on 28 April 2008, 14:48:48
Sounds like classic symptoms of the traction control kicking in to me. Try it with it turned off.  ;)

Kevin
Title: Re: Gear box or diff?????
Post by: prestigesec on 28 April 2008, 14:51:40
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Sounds like classic symptoms of the traction control kicking in to me. Try it with it turned off.  ;)

Kevin

It wouldnt let the revs climb though would it?
Title: Re: Gear box or diff?????
Post by: Kevin Wood on 28 April 2008, 15:00:36
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Sounds like classic symptoms of the traction control kicking in to me. Try it with it turned off.  ;)

Kevin

It wouldnt let the revs climb though would it?

No, it wouldn't. Didn't spot that.  :-[

My first check would be tha auto gearbox fluid level. If it's sucking air due to low fluid level I guess it could be dropping out of gear briefly.

Kevin
Title: Re: Gear box or diff?????
Post by: prestigesec on 28 April 2008, 15:10:45
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Sounds like classic symptoms of the traction control kicking in to me. Try it with it turned off.  ;)

Kevin

It wouldnt let the revs climb though would it?

No, it wouldn't. Didn't spot that.  :-[

My first check would be tha auto gearbox fluid level. If it's sucking air due to low fluid level I guess it could be dropping out of gear briefly.

Kevin

Am sure i remember reading on here somewhere that its a pig to check that? It is going in for rocker covers soon  so can sort it then hopefully. Watch i will be on tomorrow sellin for parts as box blew up  ;D
Title: Re: Gear box or diff?????
Post by: markey mark on 28 April 2008, 15:13:10
change oil and filters bud makes loads of difference and get tech2 gearbox upgrade !! :y
Title: Re: Gear box or diff?????
Post by: prestigesec on 28 April 2008, 15:36:32
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change oil and filters bud makes loads of difference and get tech2 gearbox upgrade !! :y

Whats the best oil for the gearbox?
Title: Re: Gear box or diff?????
Post by: Kevin Wood on 28 April 2008, 18:29:20
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Whats the best oil for the gearbox?

Fuchs Titan 4000 from Opie. You'll need 7 litres or so.

Probably worth changing fluid if the history is unknown although if you're not going to get round to it soon I would check the level ASAP.

Level change involves filling to the bottom of the level plug on the driver's side of the car, while the car is level and the engine is running. Similar setup to a manual gearbox / diff filler / level plug.

Kevin
Title: Re: Gear box or diff?????
Post by: TheBoy on 28 April 2008, 20:23:24
Gearbox most likely.  Any gearbox codes on MID?

Replace fluid, see what happens. Don't drive for too long like it, you'll bugger the box.
Title: Re: Gear box or diff?????
Post by: prestigesec on 28 April 2008, 22:00:33
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Gearbox most likely.  Any gearbox codes on MID?

Replace fluid, see what happens. Don't drive for too long like it, you'll bugger the box.

No warnings or anything strange, could it be a leak as rocker covers are getting changed as they ar eleaking and as you would no when quite a bit of oil under car its hard to tell where its come from.
Title: Re: Gear box or diff?????
Post by: osealy on 28 April 2008, 22:10:06
I had a td that did that for 40k mls . Changing from rev to fwd. Or booting it after standing on brakes for roundabout. V annoying but worked around it. never figured the cause.
Title: Re: Gear box or diff?????
Post by: Kevin Wood on 28 April 2008, 23:15:07
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I had a td that did that for 40k mls . Changing from rev to fwd. Or booting it after standing on brakes for roundabout. V annoying but worked around it. never figured the cause.

Probably low fluid level. If you stand on the brakes all the fluid gets thrown to the front of the box and leaves the pump intake high and dry. Fluid pressure falls and the box drops out of gear.

Kevin
Title: Re: Gear box or diff?????
Post by: prestigesec on 29 April 2008, 00:09:36
Will do the fluid tomorrow thanks a lot guys.  :y
Title: Re: Gear box or diff?????
Post by: hotel21 on 29 April 2008, 00:12:11
Would also consider the handbrake shoes dislodged from the backing plate.  possible that they are jamming on the inner part of the disc and need a rev or several to overcome it as you move off....
Title: Re: Gear box or diff?????
Post by: prestigesec on 29 April 2008, 00:13:32
Cheers only had the thing a couple of weeks and already loads of things need doing  >:(
Title: Re: Gear box or diff?????
Post by: hotel21 on 29 April 2008, 00:14:43
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Cheers only had the thing a couple of weeks and already loads of things need doing  >:(

Or routine/preventative maintenance thats not been done before you owned it...   :y
Title: Re: Gear box or diff?????
Post by: FRE07962128 on 29 April 2008, 05:20:08
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Cheers only had the thing a couple of weeks and already loads of things need doing  >:(

When was it last fully serviced?  Any fsh?  :-?  

It all sounds to me as though a full service is required of the engine as well as gearbox, and brakes.  That would certainly be my first objective with this car. :y  It could save you a load of bother and money in the long run.


Title: Re: Gear box or diff?????
Post by: TheBoy on 29 April 2008, 09:02:24
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Cheers only had the thing a couple of weeks and already loads of things need doing  >:(

When was it last fully serviced?  Any fsh?  :-?  

It all sounds to me as though a full service is required of the engine as well as gearbox, and brakes.  That would certainly be my first objective with this car. :y  It could save you a load of bother and money in the long run.


Though do it yourself, as sadly, many garages don't always seem to do what you expect them to, as I found out at my favourite dealers (yup, Evans Halshaw in MK, the useless, incompitent liars  >:() nearly 3 yrs ago when they supposedly serviced my car.
Title: Re: Gear box or diff?????
Post by: prestigesec on 29 April 2008, 09:47:48
Car had full service history and its last service was done just over 1000miles ago and it came with 12 months MOT. Things that need doing so far Rocker covers, Water leak as rust down side of block, Crank shaft seal, another seal somewhere cant remember that many, Wishbones, Drop links, Off side top mount the list goes on fookin great hey!! Luckily enough my best mate is a top mechanic and does most of work for next to nothing for us and i just do bits for him when he wants its a good understanding, just have to pay for parts but i get them for what he pays for them so not to bad its just the bloody inconvenience of it all. I bought it as a work horse and i aint doin any work with it in the garage!!!
Title: Re: Gear box or diff?????
Post by: prestigesec on 01 May 2008, 10:05:44
Isnt the gearbox baffled though so oil surge wouldnt be an issue??
Title: Re: Gear box or diff?????
Post by: Kevin Wood on 01 May 2008, 12:33:11
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Isnt the gearbox baffled though so oil surge wouldnt be an issue??

There's no baffling in the gearbox sump, and if the level's low, all bets are off anyway.

Kevin