Gearbox gasket

[tdcsuffolk]

Hi, my Sprint gearbox appears to be leaking - possibly from the gasket. Is it possible to change the gasket with the gearbox in situ, by draining and removing the bolts which hold the two sections together? I won't be trying this unless I am sure it will all go back together ok and springs and teeth are not going to fly out all over the floor and into my eyes and I crouch beneath. Removing the gearbox not possible at the mo.<br>
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Apologies as always if this has already been convered in previous threads - couldn't find anything. <br>
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Cheers. <!--EZCODE EMOTICON START ;) --><img src=http://www.ezboard.com/intl/aenglish/im ... s/wink.gif ALT=";)"><!--EZCODE EMOTICON END-->

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[tdcsuffolk]

No-one wanting to give some words of advice...? <br>
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Ya boo sucks <!--EZCODE EMOTICON START :( --><img src=http://www.ezboard.com/intl/aenglish/im ... /frown.gif ALT=":("><!--EZCODE EMOTICON END-->

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[paulgeering]

You don't appear 100% sure where it is leaking from. Clean thoroughly and go for a short drive and check carefully to find exactly where it is coming from. A little oil can go a very long way so be certain.<br>
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An oft overlooked gasket is the one at the front end of the box - within the bell-housing - where the main shaft enters the box. You will need to remove box and cross shaft to do this one and as far as I am aware no pre-cut gasket exists for it. Affraid you will have to nick the kitchen scissors and attack a sheet of gasket material.

<p></p><i>Edited by: <A HREF=http://pub52.ezboard.com/bthetriumphdol ... geering</A> at: 1/4/04 9:35 pm<br></i>

[paulgeering]

Do you mean the seal between the box and the O/D? If you do....I have changed the O/D with the box in situ but I had the use of a pit. It was not at all easy as the O/D is extremely heavy at chest level with limited arm leverage. I will never do it again - I would take the engine and box out every time! I reckon I could do the job in half a day..but I'm not going to! <!--EZCODE EMOTICON START :smokin --><img src=http://www.ezboard.com/intl/aenglish/im ... smokin.gif ALT=":smokin"><!--EZCODE EMOTICON END-->

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[Jon Tilson]

There are a few places oil can leak on a Sprint bix and I'm afraid the only way to diagnose is to give it a good clean and then fill it up and run it....<br>
Its then that you gopefully find its running out of the back of the rocker cover and it isnt gear oil at all....<br>
If it is box oil then you have some options. If its the o/d to adapter plate gasket you can chage it in situ but its a bitch. Its also extremel unlikely....but you can slide the o/d back off the mainshaft and then back on if you must. Its not an easy job and sometimes the splines can be a real git to line up...<br>
The plate at the bottom of the o/d can leak and this is an easy fix. Make sure various plungers and valves dont drop out and go walkies...<br>
If its the o/d tailshaft seal then its o/d off to fix really...<br>
If its the adaptor to gearbox seal it may respond to a tighten but its unlikely. Full box rebuild. On the single rail and 3 rail dolly boxes the exhaust mounting sometimes make these bolts work loose and then they leak. Ive sealed them with hylomar and a good tighten. I cant remember what a Sprint one looks like here.<br>
If its coming from the top selector area you can change the gasket here with the tunnel out.<br>
Obviously tighten the drain plug.<br>
If its at the engine to box joint then its the front seal and you have to have the box out.<br>
Any more advice and I'm charging you...<br>
<br>
Jonners<br>


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[tdcsuffolk]

... thanks lots for all the info. Sadly car not MOT'd so can't really go for a good run, but I will give the box a good clean and run sitting and re-check. It seems to leak even when stationary. More investigations needed methinks. Cheers. <!--EZCODE EMOTICON START : --><img src=http://www.ezboard.com/intl/aenglish/im ... ohwell.gif ALT=":"><!--EZCODE EMOTICON END-->

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[george]

if you run the car rear wheels off the ground and select 3/4 engage o/d and switch off the engine and let it stop still in gear and o/d selected it comes off very easy and is easy to reinstall this method locks the o/d unit and its only the plunger collar u need to worry about when reinstalling the o/d

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[alun n]

George, I think you need to write a book of top tips and I think I just gave you the title!<br>
<br>
Leastwise a bit of contribution to the magazine......?

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[george]

forgot to say if you do have to strip the o/d unit <br>
we used to have a main shaft to hand to line it up <br>
prior to refitting it very handy

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[triumphdolomiteuk]

Although a large number of our members do read the forums,quite a few members don't have computers.We're always on the lookout for technical articles for Dolly Mixture....

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