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Unread 04-07-2014, 06:22 PM   #1
SDine09
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T150 trans leak. input oil seal or gasket?

Well fix one thing another goes wrong. Changed my trans gear oil and found out why it only had a quart in it it has a leak between the transmission itself and the flywheel housing. My question is before I go and drop this trans is it a gasket or the old seal?

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Unread 04-07-2014, 07:39 PM   #2
GB3440
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Is it dripping between the trans and the bell housing or from the inspection cover in front of the bell housing?
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Unread 04-07-2014, 07:49 PM   #3
SDine09
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Between the trans and the bell housing
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Unread 04-07-2014, 08:33 PM   #4
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Between the trans and the bell housing
Hmm... Someone might correct me but if it was leaking from the input seal it should be dripping at the front of the bell housing as the oil would have to flow "uphill" to come out between the trans and bell housing. I just happen to be putting my T150 back together and took a couple pictures to help me figure this out. If your housing is like mine, there is no way for the oil to flow except out of the front of the bell housing if it leaks from the input seal. Now if you look at the picture of the front of the T150, it could leak from the input bearing retainer gasket or from the cluster gear shaft next to it. The shaft has a light press fit so it seems doubtful it's coming from there. My guess is the gasket is leaking from the input bearing retainer.
img_0239.jpg

img_0240.jpg

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Unread 04-07-2014, 08:44 PM   #5
SDine09
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I never work on a manual trans before but I would assume your right there is no way it could be leaking up hill I've had it parked in my garage for about three days now it's probably the gasket. So in your opinion how much of a pain in the but is it going to be to replace that. Am I looking at a good solid day worth of work or is it a weekend job?
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Unread 04-07-2014, 08:57 PM   #6
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My T15 in my 73 leaked around that shaft-in-bore interference-fit hole where the countershaft rides in the case. You can see it in your pic showing the front of your transmission below the bearing retainer. Some fix it with a light coating of RTV. I replaced my case with a NOS one. That fit is supposed to be tight.
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Unread 04-07-2014, 08:57 PM   #7
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Quote:
Originally Posted by SDine09 View Post
I never work on a manual trans before but I would assume your right there is no way it could be leaking up hill I've had it parked in my garage for about three days now it's probably the gasket. So in your opinion how much of a pain in the but is it going to be to replace that. Am I looking at a good solid day worth of work or is it a weekend job?
I would say a good solid day. But I've got real good dropping my transfer case and transmission lately.
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Unread 04-07-2014, 09:10 PM   #8
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Well this will be my first time in this jeep so I'm going to say it will take me from sun up to sun down to get this done. Thanks for the info and the pictures help alot
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Unread 04-07-2014, 09:16 PM   #9
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Quote:
Originally Posted by SDine09 View Post
Well this will be my first time in this jeep so I'm going to say it will take me from sun up to sun down to get this done. Thanks for the info and the pictures help alot
PM sent.
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Unread 04-08-2014, 08:12 AM   #10
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After a few times it will go quick.
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Unread 04-17-2014, 09:31 PM   #11
SDine09
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Well finally got the time to pull the heavy son of a gun out and the gasket looked good but still replaced it. The only thing it could have been was the counter shaft plug was missing and the previous owner just caked silicone in the hole which didn't seal anything so I made a gasket around the hole with some black liquid gasket and that seemed to work.. I hope because I never want to drop that trans again! But thanks again everyone for the help.
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