gearbox choice (swing axle)

70BAJA Casual Dubber

28 posts · joined Jul 2006 · 3 Aug 2006, 6:47 pm

#518586

can anyone help me with the box to run?
the engine is a single port 1600 (ratio rockers fitted very soon)
the problem is the car seems to struggle on a few highway hills. with the stock box
the tyres i run are 265/75 15 road patern
so in other words what swing axle box has the shortest 4th gear

thanks

VWCOOL 23 Windows of Awesome

5,158 posts · joined Jun 2003 · 3 Aug 2006, 6:50 pm

#518589

do you have four (1970s) or five stud (1960s) wheels?

Pay your debts, CxxT

70BAJA Casual Dubber

28 posts · joined Jul 2006 · 3 Aug 2006, 7:12 pm

#518595

its a 70 model four stud ie(70BAJA)

Baja Wes V6 Baja Pioneer

3,119 posts · joined Aug 2002 · 4 Aug 2006, 8:48 am

#518768

The far better option would be to put a 1600 twin port in there, maybe some slightly bigger pistons too. Then you'll be able to pull the tall 4th gear.

I'd rather spend the money on more power to take advantage of the nice tall highway gearing than to spend the money to put in an older model gearbox with short gearing.

Wes - www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control... 🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.

pete wood 23 Windows of Awesome

6,828 posts · joined Jan 2004 · 5 Aug 2006, 7:00 pm

#519022

I'm with wes. By the time you put in the early box in a reasonable nic you could just as easily put on a set of 1640 pistons and pots to go with your ratio rockers. Besides, a stock 1600 will destroy some early swingaxle boxes so it's a short term gain anyway.

"stoopid is stronger than axles"
http://drivingnotpolishing.blogspot.com.au/

70BAJA Casual Dubber

28 posts · joined Jul 2006 · 6 Aug 2006, 8:22 pm

#519153

thanks guys ill save some bucks and put some larger pots in
hopefully the ratios make a difference

tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 · 7 Aug 2006, 8:25 pm

#519417

Well, to answer you original question, a 1200 barrel box. (4.3 diff. and 0.89:1 4th gear)
Available at most rubbish tips and bush dumps!!!
L8tr
E

Im not a complete idiot, quite a few parts are missing....

VWCOOL 23 Windows of Awesome

5,158 posts · joined Jun 2003 · 7 Aug 2006, 9:30 pm

#519452

closely follwed by a late 1300 box (1971-73?) cos it has a 4.3 diff too, with four-stud wheels. Do you need tyres that big?

Pay your debts, CxxT

70BAJA Casual Dubber

28 posts · joined Jul 2006 · 10 Aug 2006, 8:29 pm

#521005

265/75 15 i have are roughly an inch smaller than 31 10.5Rs
i do believe that most bajas around are running the 31s
so to answere the question do i need them that big
their not that big

Baja Wes V6 Baja Pioneer

3,119 posts · joined Aug 2002 · 11 Aug 2006, 9:02 am

#521141

correct, they are not that big. I run 31's and used to have a 3.88:1 R&P box, it was good. The smallest engine I ran with that box was a 1776. It had enough power to pull top gear, and was nice on the highway. I drove my baja with that box and a 1915 from brisbane to canberra and back for the summernats one year. It was good.

Wes - www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control... 🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 11 Aug 2006, 11:11 am

#521157

VWCOOL wrote:Do you need tyres that big?

Yep, because its going offroad and it :jesusis a Baja