Outer Limits 4x4 Board

hey guys,
ive read that these sierra transfer cases arnt 1:1 ratios?? i am building a dune buggy, and i am running a v6 commodoe motor with the standard TH700 auto box, and going to run it into the tcase then back to the diff. so i can run the commodore motor as rear engined, also how much could i expect to pay for a sierra tcase

1l transfer case is about $450. dont know about 1.3

Last two I bought cost $350 from SUZI FOUR at dunheved , SYDNEY for late model 1.3 transfer cases , which don't have the handbrake mechanism , Cheers Paul

Correct, Most run 1.409 (1.3) or 1.55 (1.0 litre) high range.

I guess if you're running rear engined you'll be using the transfer case as a "V drive" driving into the case normally (but with the input of the case facing rearwards) and then driving the rear axle with the front output.

In a buggy, I think it will be OK, but I would look into a heavy duty front output shaft. It's not really for the strength, but the stock item can disengage under high load. The HD part has deeper teeth that hold in better.

Steve.

thanks heaps guys, yea i will be using the transfer as a v drive, i have worked out that the reduction is actually going to be perfect when i run 31inch tyres, i wil be runing the motor in through the input shaft, then back out the front input shaft to he diff.. i will think about gettin a stronger front output shaft, ive been told these tcase are easy to rebuild. is this true?

Yes, they're pretty straightforward. I think it will take the power ok, once you have the HD output shaft mod done.

Steve.

hey guys, a thought has come to my head, because im using the tcase as a V drive, i will be running the motor at the rear of the buggy, so basically the front of the motor will be pointing out the back of the buggy and the gearbox closest to the front, if i stand at the back of the buggy which is the front of the motor, in drive the driveshaft turns anti clock wise. and because it runs back into to the diff from the front output shaft, does that mean that the buggy is actually gunna drive towards the front of the motor instead the front. and id have to drive in reverse to go forwards? i wanna work that out before i go making it, for the buggy to move the correct way, the front shaft out of the tcase would have to spin clockwise. which is you were looking at the front of the diff with the pinion pointing you would be anti clockwise. is this correct

Flip your diff centre and run it in reverse , Cheers Paul.

thanks for the quick reply. this is a commodore diff outa a vn, is it possible to flip the diff center? i didnt know that

Two ways , if the diff backing plate is stepped it needs to be cut of and rewelded , then flip the centre in the housing , or flip the whole diff and remount suspension bracket on top , Cheers paul.

cheers mate, by stepped do you mean, the actual inspection plate stepped or something else, so just flipping the diff upside down will flip the direction, cause thats no problem at all i gotta make custom suspension mounts anyway.

Yes , the inspection plate , if you swap the crown gear to the oposite side by flipping it over so original suspension mounts are on the bottom , it will drive the other way , also diff breather will need to be moved to top of diff , and you might want to swap the back plate so hand brake is back in original position , Cheers Paul.

cheers mate