43 replies to this topic

[hanra]

Whilst replacing my rear extension housing seal again last night, I noticed some oil around the front of the gear box. Had me thinking about the front input shaft seal....

Now apparently there are two type of input bearing retainers? One with a seal, and another as an oil slinger?

The bearing retainer that I have on the input shaft is the early oil slinger P/N: 7436171



However... I think my input shaft is not the oil slinger type and requires a neoprene seal???????





This is how the gearbox was when I pulled it apart... so someone has got it wrong.. F uck I wish I knew what I was doing with this stuff.

Its going to mean gearbox removal..... Would it be easier to detach the box from the bellhousing instead of trying to remove the bellhousing from the block?



Ive stolen these pics from HQSS hope you dont mind mate...

He lists this as the early oil slinger type:




And this as the later oil seal type....(which I reckon I have)




Here he lists the bearing retainers

Neoprene seal type:




And this as the oil slinger type (same p/n as mine)



This problem has pretty much pushed me over the edge. Where will I find the correct bearing retainer and seal?

Edited by hanra, 21 December 2012 - 08:10 AM.

[yel327]

Easy, any approx 1974 onwards V8 3 or 4spd. The one you have is much harder to find, not that you'd ever want one! I've got most of the p/n's on my website. Haven't uppdated it for a while - there is some info to fix, but the numbers are right.

http://www.monaropar.../aussie4spd.htm

If you can't find one locally i've probably got a few in the shed somewhere.

[hanra]

I think this box is dated coded as a 72 box. Do you agree that I have the incorrect type fitted????

[76lxhatch]

It is definitely a different type, but I've had them with a seal shaft in a slinger retainer and they don't leak (unless you park on a really steep downhill slope in which case the slinger will leak anyway).

What you don't want is the reverse, you'll notice the hole in the bottom of the retainer bearing slide which is normally in front of the seal.

Being a V8 with the long input shaft and bearing slide makes it longer for the oil to travel too.

[hanra]

Perhaps Ive induced the leak, as when I did the rear extension seal, I jacked the rear of the car way up, so I didnt have oil leaking out the back of the box when I took the tailshaft out?

But come to think of it, the oil I found appeared to be between the bottom of the bellhousing and the box itself. If it leaked out the input shaft it would be leaking oil from the bottom of the clutch inspection cover.

I cant for the life of me remember if I fitted it with that hole lined up on the bearing retainer with the hole in the box. I do remember seeing the cut out in the gasket though. I guess I could remove the clutch inspection cover and see which way its fitted by comparing it with my initial pic I took when I removed the box from the engine.

Edited by hanra, 21 December 2012 - 10:30 AM.

[yel327]

You defintely need to change the input shaft cover. They can also leak if some idiot has driven a shotened layshaft out through the front of the case rather than use a proper smaller diameter dummy shaft when rebuilding the box. In that case you need to put some sealant like loctite around the engine end of the layshaft which means pulling the box apart.

[hanra]

Is it easier to remove the box from the bellhousing and pull it out that way? Rather then remove the bellhousing from the block?

Seems a tight fit to get to the bellhousing to block bolts......

[hanra]

What a bugger... not a job I want to have to do.

[308 Sunbird]

Definately box out only Brad, leave bellhousing and clutch set up in place.

You defintely need to change the input shaft cover. They can also leak if some idiot has driven a shotened layshaft out through the front of the case rather than use a proper smaller diameter dummy shaft when rebuilding the box. In that case you need to put some sealant like loctite around the engine end of the layshaft which means pulling the box apart.

I always put some sealant around that lay shaft opening anyway- the bastards frequently leak there.

[hanra]

.
I always put some sealant around that lay shaft opening anyway- the bastards frequently leak there.

I don't quite understand where this area is?

[308 Sunbird]

Looking at the second last photo- just beneath the bearing retainer, you can see the layshaft just poking out of the case.
They can leak between the box & bellhousing. I just make a circle of silastic around the layshaft & let it go off before refiting
the box.

[yel327]

Is it easier to remove the box from the bellhousing and pull it out that way? Rather then remove the bellhousing from the block?

Seems a tight fit to get to the bellhousing to block bolts......

Pretty easy job. Remove the shifter and tailshaft, undo speedo cable, disconnect 4th gear pollution switch (if there) and reverse switch. Drop the crossmember and lower the engine with a trolley jack under the sump with wood on top. Then you can get to the 4 x bolts. Slide the box out.

[hanra]

I'll have to dump the exhaust also. Ill get to it during my sober moments I guess.

I do thank you all for your educated comments however. As I'm flying blind.

Edited by hanra, 21 December 2012 - 06:29 PM.

[hanra]

Is the neoprene seal replaceable? Where would I buy a new one from?

[S pack]

Is the neoprene seal replaceable? Where would I buy a new one from?

Brad the seal is replaceable and you should be able to get one from a bearing supplies.
I should have a few new ones laying around, I'll have a look later and let you know.

[hanra]

Thanks Dave. Ill have to source the correct bearing retainer also, would you have a spare or swap for this oil slinger one I've got?

[S pack]

Thanks Dave. Ill have to source the correct bearing retainer also, would you have a spare or swap for this oil slinger one I've got?

Sorry mate, don't have any V8 specific gearbox parts. See if you can source an old V8 3spd with the oil seal cover. Sholud be cheap as chips to get a complete V8 3 spd box. Or try a local gearbox repairer.

[yel327]

V8 3spd's are worth more than 4spd's nowadays! Especially HT ones.

[S pack]

Brad, I've got 3 input shaft seals, two loose seals (brand???) and one in a GMH packet. The three of them look identical so might all be the same brand.

[hanra]

I'm happy to pay cash for the right one!

[LJGTR6]

Brad.
I bought one of these myself for a different reason. Where the thrust bearing runs was worn badly.
Stopped into CBC bearings on the way home and picked up the correct seal. Bolted it on and all done.
Bit pricey but the finish was good and the fit was perfect.

http://www.ebay.com....1#ht_889wt_1163

Looking at the second last photo- just beneath the bearing retainer, you can see the layshaft just poking out of the case.
They can leak between the box & bellhousing. I just make a circle of silastic around the layshaft & let it go off before refiting
the box.

That is good advise. I wondered that when looking at mine. It is a good tight fit but what stops oil getting by the
lay shaft in the case. Would not leak much but easy to do this while it is out of the car.

On another note can anyone explain what this hole is for. When finished it lines up with the one
in the candle stick and is on the leaking side of the seal. It would be nice to know the reason for it being there.

 9970CA7C-D3F4-4488-B7F6-3D41E533F671-2470-000002AE6ABC07C0 (1).jpg   64.6K   4 downloads
 !BWwrBmQ!2k~$(KGrHgoOKjsEjlLmVqugBKY7NM5UP!~~_12.jpg   108.51K   2 downloads

Don't envy you having to take the box back out. That is my biggest fear building mine. getting it all together and
then having an annoying little leak somewhere.

[hanra]

Just got online to get some quotes for the correct input shaft cover P/N: 9930910

New $250
2nd Hand: $140

Yikes.. sounds like someones out to rip me off just in time for Xmas?

Edited by hanra, 24 December 2012 - 02:14 PM.

[hanra]

Dave has kindly advised that the P/N for the input shaft seal is P/N: 3987936.

Ill try and contact the local GMH Dealer here and see if they stock them.

Had a hit on eBay for that P/N: http://www.ebay.com....=item27cd649601