urgent help holden 253 gearbox

Submitted: Monday, Jun 24, 2013 at 20:49
ThreadID: 102937 Views:1455 Replies:4 FollowUps:1
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Hi guys.

Some people I know are entering the variety charity bash and are fitting a holden 253 and box to an old merc. The motor is fitted but every time the box is fitted it leaks trans oil from near the torque converter.

Have tried a new seal but it still pours out oil.

The box was not tested before fitting but was told it was fine.

Any ideas would be appreciated.

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Reply By: Member - William B (The Shire) - Monday, Jun 24, 2013 at 21:49

Monday, Jun 24, 2013 at 21:49
The torque converter needs to be mated up the the pump in the box.
place the the converter onto the box and rotate the converter with some pressure applied until you feel the converter slot into the pump.
I cant remember if it is just the once or twice it needs to happen.
my apologies if you have done this,
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AnswerID: 513757

Follow Up By: 4 runner - Monday, Jun 24, 2013 at 22:07

Monday, Jun 24, 2013 at 22:07
As far as I know the convertor was just put and bolted up to the plate without any turning except to line up with the plate for bolting..

Didn't know this would cause a leak..more of a manual box person..
FollowupID: 792521

Reply By: shanegu6 - Monday, Jun 24, 2013 at 22:12

Monday, Jun 24, 2013 at 22:12
It shouldn't leak oil if the torque converter isn't slotted in correctly to the transmission. But if it isn't slotted in correctly you won't have any drive.
AnswerID: 513760

Reply By: Ross M - Monday, Jun 24, 2013 at 22:32

Monday, Jun 24, 2013 at 22:32
Maybe it is the large diameter "O" ring which seals the pump housing is leaking and not the input seal on the torque converter.
AnswerID: 513764

Reply By: Mark&Sue - Tuesday, Jun 25, 2013 at 08:55

Tuesday, Jun 25, 2013 at 08:55
What you will need to do if you have mated converter to transmission correctly before installing is take tranny to Transmission specialist for them to install new front pump bush and new seal and ask them to install converter to trans, then refit to engine and all should be good.The bush does wear causing seal to leak, also converter does have to be installed correctly to trans, otherwise bell housing can crack when bolting trans to engine. I done my apprenticeship on these many years ago and did crack a bellhousing a long time ago.
Cheers & good luck in the bash.
AnswerID: 513778

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