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Gearbox with o/d fitting time scale?


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Hi All.

I'm considering replacing my existing gearbox, with a re conditioned one which has an overdrive unit on.

I could probably manage the removal of the interior myself, prior to taking it somewhere for the swap, and wondered how mammoth a task is it to do the exchange?

 

Tia

Peter

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Make sure you take it to a TR specialist, the gearbox removal has to be lifted, pulled rearwards, lifted again and swivelled and jiggled ! to remove it from out of the interior. A normal everyday garage of today is likely to struggle and possibly damage some of the interior even though it sounds like you are going to strip (good idea) a lot of it out.

Replacing the same unit is obviously a reversal but normally with a lot more in red faces and colourful language, and that's just getting it in position ! The actual feeding in of the first motion shaft (the sticky out shaft of the gearbox that goes through the clutch) is part art part science and even experienced mechanics are known to wonder outside with a tea muttering whilst they contemplate another go. Conversely if you have the "knack" it just slides together with a little jiggle and a manual turn of the overdrive flange to engage it, why didn't it do that before ?

As for the time taken, with a fully stripped interior and either a gearbox lift (posted on here, excellent) or an overhead crane device to take much of the load; gearbox and overdrive removal and replace with prior built unit and a favourable engagement of the gearbox to clutch would take about 2 hours. Rebolting gearbox to engine and driveshafts etc extra to the above.

 

Mick Richards

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You can do it in a day on your own at a push.. I spread it over a couple of days one Christmas..

Most important is that to take breaks with a cuppa if you get stuck.. more damage is done by ploughing on without thinking..

Cheers

Tim

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Crossed post..a winch to lift it out would be good. Otherwise just manouvering a bit at a time is a good approach.

Alignment is important when replacing. Bottle jack under the back of the engine to manouver it and wooden levers and wedges to manouver the gearbox. Also make sure you fit the clutch with an alignment tool.. as you slide it onto the gearbox shaft turn the drive shaft out put with the box in gear until the splines align..

Cheers

Tim

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Ahhh, but this aint a strait forads swap

its a non OD box to a OD box

 

 

and a few other different things thenst come into play,

And, for piece of mind, some minor tweeks to clutch cross shaft an its lever

this so they dont brek off,!!!, easy done.

 

If got a non TR box, { saloon,or Dolly S, Stag, } then the input will be wrong

so will need a TR input shaft fitted.

 

the resident Gurus will keep ye right,

 

M

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Ahhh, but this aint a strait forads swap

its a non OD box to a OD box.

 

Thanks for that, wasn't exactly made clear there and I certainly missed it, bets are off.

 

Mick Richards

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"I'm considering replacing my existing NON OVERDRIVE gearbox, with a re conditioned one which has an overdrive unit on."

 

Now it does, ????

 

To much assuming that people know what you have fitted and what you intend fitting...we don't. Well done Neil for "reading the runes" and getting it right...by osmosis I think.

 

Mick Richards

Edited by Motorsport Mickey
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"I'm considering replacing my existing NON OVERDRIVE gearbox, with a re conditioned one which has an overdrive unit on."

 

Now it does,

 

To much assuming that people know what you have fitted and what you intend fitting...we don't. Well done Neil for "reading the runes" and getting it right...by osmosis I think.

 

Mick Richards

;) All he needs to work out J type or A type :P

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Thanks once again guys for everyone's good advice!

 

The reason for inquiring about the timescale was two fold.

A. To give me some idea of labour charges.

B. Much more importantly, I don't want my car hanging around in a worshop for days on end, and being manually pushed in and out of the way,of their other jobs...

I'd just like to have the work carried out by someone that treats the vehicle with respect.

I'm not in any immediate rush to have this done, and wouldn't put anyone under pressure to 'turn it around' quickly, nor am I looking for a cheap job - I just need to know that my pride & joy is being looked after...

Too much to ask?

Anyone fancy a winter project?

Cheers!

 

Peter

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Hi Peter,

 

to answer your original question;-

 

Gearbox in and out as a straight say clutch job - a day

If there is bracket fabrication to be done - a couple of hours

Plus adding the wiring - say three hours,

 

All the above less your stripping the interior - proboby an hour,

 

So A day and a half tops.

 

 

John.

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It depends on if you are working alone or with help and whether either or both of you are experienced spanner operators!

 

Have had the box in and out (for a clutch change) with experienced help and air tools within 6 hours.

 

However you will need to do some wiring so would spread it over 2 days.

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