Building a strong gearbox with 95% OEM parts

[benozoval56]

[bigwormskidoo]

[benozoval56]

[bigwormskidoo]

Is there a direct install coarse tooth synchro hub and gear sets?

[vincenzolorenzo]

[jim martin]

I was always surprised how much abuse a stk swingaxle could take ,in the good old days we plain abused the hell out of those poor things in every form possible on the dirt and street and they still just kept going .
it was not until we started dropped the hammer at the track things broke .and it seamed to always be the ring and pinion as most common failure.
all the other mods in the world really did not make much difference .
when we started just slipped the hell out of the clutch before dumping it or made our own arm dampers failures dropped .
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[Bruce]

When you pressed on the 3-4 hub with slider, you pressed it on too far. If you measure your endplay on 3rd gear, it won't be enough. VW says 3rd gear endplay needs to be .10-.25mm.
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[vincenzolorenzo]

I'm rebuilding a stock late style transmission with the splined main shaft. When I assemble the mainshaft i'm getting way too much clearance at the 4th gear thrust washer, 0.50mm. I've tried a few different combinations of 3-4 slider hubs and different 4th gears in case one of those parts was wrong but getting same clearance everytime. Can see with your eye that the 4th gear bearing race journal on the shaft is sitting noticeably proud of 4th gear.

Have never had this issue before, if anything the clearance is too tight and a light linish on the gear is needed to get it to the 0.10 - 0.25 mm range.

I'm stumped on this one, can anyone shed some light on what the issue might be and what I could do to resolve?

[Arc Eye]

Great post here, really helpful inputs from all

Do you have a list of parts that are needed from Weddle as finding it difficult to work out what is needed exactly so i can mail order them without any problems

Im looking at a master rebuild kit from Rancho and the rest from Weddle for a comprehensive rebuild to a stronger transaxle

Would be great to see a parts list needed to complete a really solid build using the ideas here. I only started to look as i picked up a Bugpack Super Diff for my swing axle and thought i could do more...down the rabbit hole i go!

[rodgersbadassbus64]

“B e careful swapping the 3.88 r/p. Sure that will drop your rpm but also decrease the hp at the wheel by 11%.”.

Why?
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[ngobet]

[Millionmph]

This is real good stuff, i just finished my new motor and the gearbox in the car has a bad 3rd synchro and someone i think swapped 4.375 into it (early IRS) and it revs like 3200 at 60 with a 205 65 15; I just scored a late single cover IRS with 3.88s in it and this is going to help address any concerns that that one might have; Question for OP though, what is the difference in an IRS ring/pinion setup compared to the swingaxle fixes you did? ie the spider gears, is there such a thing as 15 and 10 spiders for an IRS??? or are we stuck with 11 tooth spiders? Can older spiders be made to work or are they a different creature?

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[Stocknazi]

I've got a few questions about using a Type 1 or Type 3 IRS transmission to build for a split window bus (61-67 tunnel mount unit). This thread seemed like a good place to ask.

No lowering, stock height with reduction boxes.


I've got a few transmissions that I may decide to use as a core to rebuild for this bus.
I have:

Type 3 IRS
Type 1 IRS
Type 3 swing axle

Are any of these units good to use as a base for a stock height bus?
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[rustybug1990]

Thank you very much, put just how I can understand it.

[Clatter]

How long is a fish?

I’d say a transaxle built like shown here could pretty much handle anything you could throw at it if you’re running street radials.

If you’ve got slicks and are hitting the water box and doing a burnout at the strip,
Then you might be pushing your luck.

Or if you’re on the throttle bouncing off the rev limiter while airborne in a desert car..
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[rustybug1990]

So any idea what kind of launching punishment could this handle?

[benozoval56]

[rustybug1990]

Bump

[rustybug1990]

What kind of power numbers should this be able to handle? I'm not sure what exactly I want to build yet but I know it will be close to 2.0L and turbo charged. Is this something that would be worth my time or should I just but another unit?