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LT77 front oil seal advice please!

Posted: 08 Jan 2013 17:14
by TR Tony
I suspect a leak from the front seal of the 5 speed box in my TR8. It's got quite bad so I need to sort it.

Apart from the obvious matter of removing the box (this will be done with the help of a garage with a lift etc), are there any things to watch out for when changing the seal? I am assuming I need to remove the front cover to get at the seal. I will be changing the clutch while the box is out, and probably the pivot arm.

Any advice from those who have tacked this before is very welcome [:)]

Tony
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<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">

Posted: 08 Jan 2013 17:50
by john 215
Hi Tony,

Easy enough job once box out, un-bolt the front cover, be careful as there are a couple of shims for adjusting the bearings, I have seen a couple of boxes where these have broken up but that is unusal and not the norm,the seal lives inside this housing, dont forget to order a gasket for the front cover.

I would also change the oil and check things like gearchange housing bushes etc.

Cheers John

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LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6,ON THE ROAD NOW KICKING AR5E !!!!

Posted: 08 Jan 2013 20:18
by Beans
As tolerances or pretty tight on the bearings prepare for fitting a new shim to get the correct tension/play on the front bearings ...

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<center>Image
<font color="blue"><i>1980 TR7 DHC (my first car, now restored and back on the road)
1981 TR7 FHC Sprint (better known as 't Kreng)</font id="blue">
<b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="3"><font color="red">My full Weblog</font id="red"></font id="size3"></b></u>[/url]</b></i></center>

Posted: 08 Jan 2013 20:34
by Workshop Help
About that little pre-load issue on the shims. Please bear in mind that wear over the miles can result in a looseness with the shims. This wear comes from the bearings and races melding into themselves. As such, a resetting of the shim pack may be necessary. I set mine up a tad on the tight side and put up with the noise as it wore in. After some 20,000 miles now, the box is quiet and very smooth in shifting and in operation.

Had I been a typical unaware driver, the noise would have been unacceptable. This is why shops set the shim distance a bit on the loose side to prevent customer complaints with the result being the gearbox does not last as long as it could.

Mildred Hargis

Posted: 08 Jan 2013 21:44
by DNK
Somebody splain that tool to a lay man

Don
Stick a Wedge In It
80 TR7 V8 Kick in the pants
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Posted: 08 Jan 2013 22:48
by FI Spyder
It is a dial gauge to measure the in/out play in the input shaft (adjusted by talked about shims). The base of the arm is magnetic so it attaches to metal surface. The magnetic base is turned on and off (deactivated) by knob on the base for easy removal.

They are not particularly expensive and really handy for a plethora of jobs.



- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT
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Posted: 08 Jan 2013 23:41
by DNK
So do you lift up on the input shaft to see play?

Don
Stick a Wedge In It
80 TR7 V8 Kick in the pants
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Posted: 09 Jan 2013 00:30
by Hasbeen
Beans I love your workshop, & the quality of your tools.

You would hate mine.

Hasbeen

Posted: 09 Jan 2013 07:33
by Beans
I borrowed the dial gauge from a friend and "that" workshop is the (rear)cellar,
which was the only place in the house which I could secure so that no one would stumble over,
or interfere with the 'box parts lying around for the time it took me to get the 'box back together again.

Especially sourcing the correct shims was a bit of a pain,
as a result that part of the cellar was forbidden territory for a couple of weeks [}:)]

<center>Image
<font color="blue"><i>1980 TR7 DHC (my first car, now restored and back on the road)
1981 TR7 FHC Sprint (better known as 't Kreng)</font id="blue">
<b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="3"><font color="red">My full Weblog</font id="red"></font id="size3"></b></u>[/url]</b></i></center>

Posted: 09 Jan 2013 10:55
by TR Tony
Thank you everyone, all tips gratefully received. I'll let you know how it goes ......

Tony
ImageImage
<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">