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Help- How do i rebuild a gearbox. (3SGTE)
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TOPIC: Help- How do i rebuild a gearbox. (3SGTE)
#62630
Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 72
Hi,
Im gonna attempt to rebuild the gearbox from my 3SGTE rev3 engine, i think its LSD not sure though,
Ive never opened up a gearbox before so its new to me, any help would be great.
It pops out of fifth gear and leaks gearbox oil like mad,
So ill be ordering all the rubber seals, and im not sure what else i need.
What parts do gearbox rebuilds usually require?
Started opening it today, got this far, what now??? lol

_KUNENA_BBCODE_HIDEIMG

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#62631
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 108

_KUNENA_BBCODE_HIDEIMG[/quote]

Thats the fifth gear there if you don't have the tool don't do it. It would be cheaper (safer) to pay someone else to do it.
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#62632
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 88
Cant be that difficult ... I am sure you will figure it out
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#62633
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 72
what tools do i need because ive got another gearbox that need all seals to be replaced.
If thats the fifth gear it looks fine to me what could possibly be causing it to pop out of fifth?
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#62637
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 154
It's usually worn syncros that cause problems like this.
Fair play for having a go but tbh I wouldn't tackle a gearbox myself and I'd have a go at most things.
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#62645
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 4
Ul need a pullers and some cir clip plyers for taking the gears off. You should be able to buy a gearbox pullers kit but probably fairly expensive, I'd agree with the worn bulk rings as you fault. Make sure to take afew pis along the way so you can set yourself a reference when your going back together .... Fair play to you doing good work
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#62646
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 72
Thanks guys.
I should have most of the tools i need anyway,
I suppose ill just keep trying to take off whatever is loose lol
Should i watch out for anything while taking it apart?
It cant be more difficult than an engine rebuild.
im surprised im not finding much useful info on the internet...
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#62647
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 27
Did you check the selector pin, that is the allen head on the side if the gearbox.

Did you check your gearbox mounting?

If the input shaft is leaking you will need to strip the whole gearbox anyway.

Remember, you will need a press to put the gearbox back together, be very vigilant of spacings, positions and orientation of spacers.

Best of luck if you go down the road of rebuildining, it can be done.

Keep us posted.


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#62653
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 25
No offence to yourself what so ever, but the best thing to do is put that cover back on and give it to someone who has done this before. tolerances in boxes are tricky things, if you dont have the Toyota specs for shims and backlash then its a job for an experienced hand/eye.

Shit thing is, you dont truly know if its right until you put it back on and drive the car, on a duece thats not as easy as with other motor.
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#62655
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 314
WOW! nothing like a challenge eh?

I took my MR2 to Cherry Orchard gearboxes as I'd be terrible at repairing something so tricky. Anyways, as you seem determined to give it a go, take a squizz at the BGB section on how to dissasemble/reassemble a 3stge gearbox. Down the bottom of this page under 'E153 Transaxle/SW20 series':

mr2.ie/mr2/bgb/mk2/mechanical/manual_transaxle.html

I sent you a couple of karma clicks for luck also
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#62656
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 328
Braver man than me, brass synco's most likely worn. I would consider a gearbox job to be more involved than an engine build.

Sometimes its worth paying the man especially that you have it out and all.
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#62660
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 72
Awesome thanks Quandry, handy link
The only reason im rebuilding it is because im too lazy to sand blast and paint another one,
also i like taking things apart anyway.
Here are some pics from today:

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Having a hard time getting this nut loose.

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Also found a very helpful video :)
http://youtu.be/hjnoIg1m6rk
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#62692
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 72
Got that big nut off the top, it didnt wanna come off, i tried a big socket and breaker bar then i tried a big impact gun, both failed, but where everything fails the grinder succeeds

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It didnt wanna come off in one piece

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Minor damage to the threads

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Got this piece out too, whatever its called....

_KUNENA_BBCODE_HIDEIMG
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#62693
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 154
Do you not have a torque wrench?
I'm starting to squeamish looking at your grinder results... :|
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#62701
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 88
I cant watch this anymore ... this is even worse than 1 man 1 jar ...

Spla please make it stop ...
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#62705
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 72
@infamous
torque wrenches are for tightening to a specific torque,
I do have one but how would that have helped to loosen the nut?
Ill order another nut from toyota when putting it back together and tighten it to the correct torque.
I barely scraped the threads, its not as bad as it looks in the pic.
Pictures always make things look bad.

@japohara
If this is worse than 1 man 1 jar then you will defo be into this lol.
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#62710
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 6 Months ago Karma: 88
LOL you know me 2 well ...
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#63051
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 5 Months ago Karma: 72
Finally a little progress on the gearbox, pulled one of the gears off the top with a pulley, now struggling with the second one lol

_KUNENA_BBCODE_HIDEIMG

_KUNENA_BBCODE_HIDEIMG

_KUNENA_BBCODE_HIDEIMG
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#63071
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 5 Months ago Karma: 29
oh god!!! you are a man that likes torture....
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#63077
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 5 Months ago Karma: 72
well someone has to fix it lol
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#63122
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 5 Months ago Karma: 102
I fitted an lsd in my gearbox on the v6 using Paul woods guide over on TwoBrutal. It might be worth a look before you go much further
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#63127
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 5 Months ago Karma: 15
should have bought the gearbox i have for 80 euro LSD version... but sure it looks like your having fun .. continue on....
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#64845
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 2 Months ago Karma: 72
Now to continue where i left off
Finally got pulleys but had to drill holes because the original ones were too far out, messed up a couple of drill bits in the process...

_KUNENA_BBCODE_HIDEIMG

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Now i need a tool to remove them star shaped screws...

_KUNENA_BBCODE_HIDEIMG
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#64849
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 2 Months ago Karma: 27
So Far, So good.

Keep it going!

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#64870
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 2 Months ago Karma: 72
Finally ripped that gearbox apart
Now can anyone tell me what it is i have to replace to stop it from popping out of 5th gear?

_KUNENA_BBCODE_HIDEIMG
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#64931
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 2 Months ago Karma: 72
Im guessing 2 of the bottom parts on this pic have to be replaced...
can anyone confirm and where to get replacements?
Ill check in toyota but they will probably charge an arm a leg and a nut

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#65636
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 1 Month ago Karma: 72
Pulled apart the second gearbox, it looks a little different inside..

_KUNENA_BBCODE_HIDEIMG

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#65643
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 1 Month ago Karma: 11
I mean fair play for having a go at it it's defo not something I'd even consider taking apart and I used to be a mechanic lol I have to say though the sight of a grinder near a gearbox makes me cringe what about all the metal filings going into the box :0
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#65651
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 1 Month ago Karma: 72
I wouldnt worry about the filings, i managed to wipe off most of them and blow them out with an air compressor, and before putting everything together ill wash each part separately in a bucket of diesel with a brush.
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#65652
Re: Help- How do i rebuild a gearbox. (3SGTE) 6 Years, 1 Month ago Karma: 72
I finally pulled both gearboxes apart.

_KUNENA_BBCODE_HIDEIMG
Can anyone tell me which is LSD?

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_KUNENA_BBCODE_HIDEIMG
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