300Tdi Auto box dip stick tube - 'o' ring?

ANDY-C · May 4, 2010

Hi all,
I have a slight leak from the auto box on my 1997 300Tdi - it appears to be coming from where the dip stick tube enters the box - i've not attempted to disturb anything yet as before i do i'd like to know if there is an 'o' ring that makes the seal (and obviously get a new one) or is it just a press fit with the large nut?

Cheers
Andy

discool · May 4, 2010

The tube just pushes in to the spigot and held by that gland nut

ANDY-C · May 5, 2010

Cheers Discool,

Had a proper look last night and at some time in the past someone has over tightened the large dipstick tube nut and fractured the sump where the neck of the tube comes out. Didn't notice this when i bought it as it wasn't dripping and stupidly i didn't dip the auto box. Doh! - I've now located a second hand sump so that should hopefully sort the problem - my olnly concern now is how long has it been run with about half a litre short of ATF and what damage this may have done. The box was changing fine - perhaps holding gear a little bit longer (only noticed the change when i filled the box up to the level) - but no loss of drive or burning smell - so may not have done anything other than shortened the life of the box a bit. Here's hoping cos at £675 +vat they anint cheap.
Cheers
Andy

discool · May 5, 2010

The problem has be up before where the weld breaks, You should get your old sump repaired and sell it and then get your money back. You will have wait and see with the gearbox but you should be ok, after all it's box made for a Land Rover and these things happen to them some times.

Regards
Peter

kindwarf · May 5, 2010

Try some liquid metal, there is some on the market now that is stronger than the origional part and can be drilled and taped ect.

ANDY-C · May 7, 2010

Hi guys,
Quick update - removed sump today and had it welded up as the second hand one i had sourced was also cracked in the same place - dry as a bone now and gear box filter replaced.
Quick question though - after re-filling the box, going through the gears and checking the level when cold - it was fine and on the mark.
Got home and checked the level again but now obviously everything is warm the gear oil level was way up the dip stick (ticking over in 'P') car on a level surface. Cleaned and checked dip stick numerous times and level was about an inch and a half over max - Is this normal when fluid is warm? I'm going to check the level again in the morning when its cold but i'd just like to know if the change in level is just down to the temperature of the oil.
Cheers
Andy

discool · May 8, 2010

That's easy to answer YES it's same as the engine oil level, lower on the dipstick when the engine is hot.

thebiglad · May 8, 2010

discool said:
That's easy to answer YES it's same as the engine oil level, lower on the dipstick when the engine is hot.

You sure about that Discool ?

discool · May 8, 2010

Yes, less oil in the sump as it's on the working parts just look for your self. No need to go through the selector routine, just pull the dipstick both gearbox and engine sump

thebiglad · May 8, 2010

discool said:
Yes, less oil in the sump as it's on the working parts just look for your self. No need to go through the selector routine, just pull the dipstick both gearbox and engine sump

Assuming we are talking about a cold engine and a cold auto gearbox I have always been to believe that the readings will be lowest when cold.

The idea behind the instruction to 'test when cold' is to ensure that the assembly in question will have enough oil if it's within the stick margins when cold.

With an autobox to establish the accurate oil level it is essential to load the box with oil by going through the 'engage all positions then back to Park' advice. If you don't go through the procedure in order to set the oil to the correct level, it will not have enough oil in and could result in damage to the auto 'box.

Matillda 300tdi · May 9, 2010

thebiglad said:
Assuming we are talking about a cold engine and a cold auto gearbox I have always been to believe that the readings will be lowest when cold.

The idea behind the instruction to 'test when cold' is to ensure that the assembly in question will have enough oil if it's within the stick margins when cold.

With an autobox to establish the accurate oil level it is essential to load the box with oil by going through the 'engage all positions then back to Park' advice. If you don't go through the procedure in order to set the oil to the correct level, it will not have enough oil in and could result in damage to the auto 'box.

Yep, I always do my Transmission fluid check with engine running and in park, thats for true reading. When turned off it shows as over but not the case.

300Tdi Auto box dip stick tube - 'o' ring?

ANDY-C

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discool

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ANDY-C

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discool

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kindwarf

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ANDY-C

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discool

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thebiglad

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Matillda 300tdi

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