Supra 5 speed with LSD??

[Kirk]

Ok forgive me if i just seem dumb, but with all this talk about diffs, and gearboxes....ive been thinking about mine, as when we went to get the van up the driveway again (different more experienced driver) he also had trouble with the drive wheel comming way up off the ground (remember its a narrow 1 way street so no turn ability when comming in) now we are talking close to a foot of the ground here....

So based on my research (browse the net) I think LSD is best, and to take into acct the fact that i want to be able to drive to adelaide (a couple of times a year) My mechanic dad said that the Supra 5 speed would be great in combatting the rev problem (he is retired and travelling around in a caravan, wont see him till chrisy 2009 at earliest...so no physical help there).

Now ive looked on ebay and ive noticed that you can buy the centre part of the diff (advertised as LSD) reasonably cheap (couple of hundred), i am curious as to know whether i could just put one in my current diff so that i dont need to change the stud pattern and thus keep my Dragways???

Also with my stock red 202 can i just fit the supra 5 speed to it with limited problems, and what are rough costs associated (assuming my mechanic friend cant find the time)...

At worst what would it cost me to get the 5 speed and an LSD installed and keep my current stud pattern?


Cheers,

Kirk

[ShaneJ]

Kirk, It would be a very difficult/expensive mission fitting an LSD centre to the standard bedford diff. It would be cheaper to do a 9 inch or borg warner conversion.

As for the Supra box, you will be a conversion kit to do the job. Also remember that there are many different versions of the supra box with different ratios and shifter positions. W57, W58, W59 etc

[Warren]

Kirk

Do you know what type of diff you have in the van ? and what ratio it is ?

I used to love the holden Banjo diffs because a ratio change took about an hour to do, as the crown wheel and pinion are all in one piece, pull the axles out a bit, unbolt the old diff centre and bolt in the new one easy as. I think the 8-1/2 &  9 inch ford diffs are similar.

This thread on Gear boxes gives some good options for gear boxes as well.

the thing to remember about gear boxes is that (unless they are an overdrive box) the final gear ratio is always 1:1 so wether you have 3,4,5 or 6 gears, the final speed is going to be the same, determined by the diff ratio, and the revs the motor can do.

Warren

[ShaneJ]

Actually 4th gear is normally 1:1 on a 5 speed box.

5th gear on the supra box could be either of the following: 0.853:1, 0.850:1, 0.861:1, 0.783:1, 0.850:1, 0.753:1.

[ben]

oh so the 9inch diff centres are just as easy as the banjo's to change warren??

cool!!

cant wait to put my 9 inch in.. then i can have a low ratio centre ready if i need to go drag a bedford home../ sounds greeat!!

ben

[ShaneJ]

oh so the 9inch diff centres are just as easy as the banjo's to change warren??

Roger that.

[Kirk]

Kirk, It would be a very difficult/expensive mission fitting an LSD centre to the standard bedford diff. It would be cheaper to do a 9 inch or borg warner conversion.

As for the Supra box, you will be a conversion kit to do the job. Also remember that there are many different versions of the supra box with different ratios and shifter positions. W57, W58, W59 etc

What does that entail? a borg warner conversion..?

My theory is surely a diff works in that the thingy turns the wheels, but a non slip has teeth on both sides? thus turns both wheels? surely someone has a simple thing where they can lock the the normally non-turning teeth on the non spinning side? there must be an easy replacement centre you can just put in that locks both sides when the centre thingy (tailshaft) spins?

(Excuse the lamen speak).

[ShaneJ]

You could could attack the ring and pinion gears with a welder and provide yourself with a locker This would be the cheapest way 

[Kirk]

You could could attack the ring and pinion gears with a welder and provide yourself with a locker This would be the cheapest way 

Obviously this isnt a good idea? cause otherwise everyone would do it? so tell me....what is wrong with the idea (besides the fact i dont know what either of the 2 things are that im meant to weld...and add the fact i dont know how to weld:) lol

[ShaneJ]

Lots of people do weld the diff gears, it just makes turning corners harder.

The reason there are no drop in LSD centres is because you couldn't make any money on it. I mean how many bedfords are out there and how many of the owners do you think would for out the dollars for one?