Gearbox oil

Submitted: Friday, Nov 07, 2003 at 08:53
ThreadID: 8357 Views:1299 Replies:6 FollowUps:3
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Can changing the motor oil have any effect on the gearbox oil or is the following just a co-incedence? I changed the motor oil (perhaps it's too thin 15/40on motor) and I have noticed a drop or two of oil on the road each morning. Directly above where the drop was I noticed some dirty old oil pooling on the bottom of the gearbox ready to drop. I guess I can have the gearbox oil changed too now, but I am perplexed as to why it started happening straight after the motor oil change? The vehicle is an early 80's l300
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Reply By: Matt M - Friday, Nov 07, 2003 at 09:47

Friday, Nov 07, 2003 at 09:47
Could be spillage or a leak from the motor dripping down onto the gearbox, you will be surprised how far oil will travel from the source!!

But apart from that, no changing the engine oil will not make the gearbox leak!

Matt.
AnswerID: 36506

Reply By: Duke-Attie - Friday, Nov 07, 2003 at 13:55

Friday, Nov 07, 2003 at 13:55
sounds like you spilt oil in that area from when you removed the oil filter...
AnswerID: 36523

Reply By: Member - Bradley- Friday, Nov 07, 2003 at 14:13

Friday, Nov 07, 2003 at 14:13
If its a manual then you may have a leak past the rear main seal on the crank which is leaking out of the drain hole in the bellhousing. Yes a thinner oil will accentuate the leak. Otherwise you are just a grub and leaked oil everywhere :-) LOL.....Cheers BradLife is short- but there's always time for a yarda.
AnswerID: 36524

Follow Up By: wizzard - Friday, Nov 07, 2003 at 16:59

Friday, Nov 07, 2003 at 16:59
The only oil spilt was the old down my arm when the filter & plug was undone, otherwise yes it is a manual and yes thank for that info because the oil leaking is old and black in comparison to the new stuff
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FollowupID: 26366

Reply By: Nav 80 - Friday, Nov 07, 2003 at 15:07

Friday, Nov 07, 2003 at 15:07
As well as all the above, if you changed the filter make sure you havent left the filter rubber seal stuck to the filter sealing face and screwed the new filter on top of it. If this happens the pressure will blow the old seal out and you can lose all your oil. For anybody who do there own services always check you havent left the old seal stuck on as I have seen a couple of seized engines because of it.
AnswerID: 36527

Follow Up By: wizzard - Friday, Nov 07, 2003 at 17:08

Friday, Nov 07, 2003 at 17:08
Thanks for that, but it doesn't seem to be the situation here, but i will always check this as a ritual from now on, thx again
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FollowupID: 26368

Follow Up By: Member - Royce- Friday, Nov 07, 2003 at 21:56

Friday, Nov 07, 2003 at 21:56
Been there.. done that.... I'm always careful.... and damn if I didn't do it again last time! Trying to get things done too quickly. Hey it's good to know others do the same dumb thing!Royce www.funshow.com.au
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FollowupID: 26393

Reply By: howesy - Friday, Nov 07, 2003 at 17:33

Friday, Nov 07, 2003 at 17:33
gearbox oil has a distinct smell about it. I suggest you get some on your figer and get it right up ya nose. Maybe it is not even gearbox oil, you would be surprised how far it will travel along a driveline.
AnswerID: 36542

Reply By: diamond(bendigo) - Saturday, Nov 08, 2003 at 12:36

Saturday, Nov 08, 2003 at 12:36
gday wizzard.
i did the same thing a few weeks ago i did an oil change on the gq and pulled over in a town 70ks from home went to the shop came out and noticed oil patch under the gear box.it had just run down from the diff got blown back a bit while driving then dripped of the gearbox.back by popular demand
:-)
AnswerID: 36604

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