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Hamish

TR3a gearbox and clutch

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Hi all

thought I would share a few pics of my attempt to remove the gearbox/od so peter cox could  stop leaks, service, and upgrade it. 

I have only had the box out once before. 

So I had to strip out the seats etc. to get the gearbox out. A full synchro Tr6 box with A type OD

I also removed the flywheel as peter was drilling and tapping it to accept the Tr6 type diaphragm clutch. Rather than the weaker Tr3 version.

i have a lightened flywheel at 8.6kg

 

i am now at the point of fitting it all back in. 

I need to work that out as - as a one man job getting it out was hard but it needs more finesse to put it all back  

 

fingers crossed for me !!

H

 

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Oh, such fun......

A bolt with a 4" (approx.) unthreaded shank and the head cut off, screwed into that top hole, makes a great guide for holding the bell housing end at the right height and line for refitting.  Possible to use studding also but the thread tends to chew up the hole in the bellhousing.

Proper alignment of the clutch driven plate (old input shaft is perfect) saves cussing too.

Nick

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Thanks Nick

i have bought the plastic alignment tool for the clutch. 

I have also got a 3” bolt as a gearbox guide. Need to take the bolt head off tho. 

Trolley jack positioned fore and afte I hope will help. 

1st job will be flywheel and clutch,

Not sure when I’ll be doing the refit but I’ll let you know. 

H

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17 minutes ago, Hamish said:

Thanks Nick

i have bought the plastic alignment tool for the clutch. 

I have also got a 3” bolt as a gearbox guide. Need to take the bolt head off tho. 

Trolley jack positioned fore and afte I hope will help. 

1st job will be flywheel and clutch,

Not sure when I’ll be doing the refit but I’ll let you know. 

H

Hi Hamish

I am interested to know what gearbox oil Peter recommended to you as when he rebuilt my gearbox (3 times) he recommended Penrite GB40 but I’ve heard that he’s recommending something different lately. Of course what I heard may be completely wrong.

Did you have the uprated layshaft with extra bearings?

Cheers Kev.

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Hi Kev

yes uprated layshaft etc. 

And yes still SAE40 gearbox oil 

I was using EP80/90. 

But will go with peters recommendation. 

He says it’s the least foaming which is better for the OD especially the quick shift upgrade. 

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Hi Hamish.

Thanks I’ll carry on with the GB40 then. I have taken my gearbox in and out seven times in the last 4 years (Sticky clutch and various Gearbox, Overdrive issues) on my own but I found it useful to have a ratchet strap from the roof truss via 5’ scaffold pole and around the prop end of the gearbox just to support the weight slightly when pushing the gearbox to the engine.

Cheers Kev.

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