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Stronger Transaxle Required
13B TLE - March 29th, 2013 at 07:14 PM

Hiya All, I purchased a 1968 Vw Beetle with a 13BT recently, I live in Perth, this vehicle has done the rounds. I am currently running a Rancho Pro street Irs box and need something stronger as this is this cars Achilles Heel. So far it seems to have had a Superdiff from states fitted, a 2nd hand transaxle - unknown fitted, and a new Pro Street Irs fitted. I am taking it in to have a highflow turbo fitted, bigger injectors, tune and new clutch. I am preparing for when the box decides to let go. Does anyone know of a straight fit box/transaxle that will be suitable for about 300HP atw. I am hoping this box will last but im having my doubts.

Thank you.

psimitar - March 29th, 2013 at 08:56 PM

have you considered the Subaru WRX box? With the reversed CW&P parts available it should easily handle your 300bhp :)

Sides - March 29th, 2013 at 09:54 PM

I've got a nice solid box "spare" down in the shed... dangerous would be the guy to say if its up to 300 rwhp or not....

http://forums.aussieveedubbers.com/viewtopic.php?tid=85287 

13B TLE - April 3rd, 2013 at 08:58 PM

Hiya psimitar, what is involved in getting the gearbox to fit, do you know? Do you know someone that has fitted the wrx box to a beetle? Also, I would have to mate it to a rx7 motor. Do you know how much will be involed in this? Is the wrx gearbox straight fit with CW&P parts. THank you,

coletrickle - April 3rd, 2013 at 09:11 PM

Manual vw transmission-dave buttler,auto vw transmission-arron roberts,The ZF renault gear boxs would be worth a look as they have a 10-5 inch crown wheel.

psimitar - April 3rd, 2013 at 10:54 PM

Quote:
Originally posted by 13B TLE
Hiya psimitar, what is involved in getting the gearbox to fit, do you know? Do you know someone that has fitted the wrx box to a beetle? Also, I would have to mate it to a rx7 motor. Do you know how much will be involed in this? Is the wrx gearbox straight fit with CW&P parts. THank you,


Here's the website of the guy that makes the reversed CW&P.
Subaru Gears

It shows everything you'll need to make the box fit and would know if a subie to wankle adapter exists.

He even rents out for free the subie tool to align the pinion shaft if you do the work yourself. He can also sell you a complete rebuilt box with the reversed gear already installed.

I'm doing it as I have an EJ22 to go in my bug but have a word with dangerous on the cost of a 2L kombi built box and then compare this to the subie conversion remembering that you get five gears with the subie box for good motorway cruising. That my opinion but I know lots of VW peeps like to stay more original :)

13B TLE - April 4th, 2013 at 08:31 PM

Hiya Psimitar, thanks for this, will look into it, i have a pro street series box from states at the moment, i dont think it is going to hold up as has been through 2 boxes already at 220hp. I would rather 5 speed, if the subie one holds up better might be an option. Subie boxes i thought were not that strong though, 2nd gear pretty weak, is this right. Bear in mind the 13bt would be a bit more aggressive that a subie motor.

psimitar - April 4th, 2013 at 10:08 PM

Well the std subie can take 250bhp quite easily and the later TY754 is probably stronger than the TY752. I've heard of 2nd gear issues but in pretty big output motors tho full throttle shifting is known for killing 2nd aswell just cos it ain't designed for this sort of abuse.

A stronger 2nd will be available from a subie performance company.