Differential

[maxtor]

I have a 73 240Z with a ZZ3 engine, TH700R4 trans, and R200 diff. I have raced it at the Silverstate Challenge, and now want to do some drag racing. It does not have posi, it is a 3.50 ratio. I am worried that if I put drag slicks on it, it might break the half shafts or differential. Plus without posi, it is not going to hook up very well. What do most of you do to remedy this problem?

 

Thanks

 

Maxtor

[DavyZ]

I have a 73 240Z with a ZZ3 engine' date=' TH700R4 trans, and R200 diff. I have raced it at the Silverstate Challenge, and now want to do some drag racing. It does not have posi, it is a 3.50 ratio. I am worried that if I put drag slicks on it, it might break the half shafts or differential. Plus without posi, it is not going to hook up very well. What do most of you do to remedy this problem?

 

Thanks

 

Maxtor[/quote']

 

I would first do a search in the chassis or drivetrain forum. There is a lot of good info there.

 

Davy

[getZ]

The way I see it from what others have done. You have several options.

 

Weld the spider gears together which is like running a home made spool (I'm not a big fan of this, although I've heard of a few people with this setup.) I also don't like a spool on a street car.

 

Find a r200 lsd. They are hard to find and pricey if you can find them.

 

Find a later model r200 off an 86 300xz with the bigger ring gear bolts, I think they were 12mm, with that you can find a new limited slip from DTS that will work (this is what I did). This gives you a bit of flexibility with gear selection. I landed up putting in a 3.9 gear set.

 

Pay the bucks for a Quaiffe diff for an r200 with the 10mm bolts.

 

Adapt a limited slip from DTS to your diff with ring gear spacers. This I know nothing about. I almost went this route, but later decided against it. I make references to DTS because I only know of two limited slips made for the r200.

 

Adapt a VLSD from a Q45 onto you car. There are adapters available or you can make your own adapter.

 

I'm sure I missed some options, but that is what I could come up with. By the way, the DTS unit is packaged by somebody else, but I couldn't remember who it was. Rumor is that it is actualy made by Nissan.

[grumpyvette]

ok lets look at it logically

the weak links are the rear diff. and the 700r4 trans once the rears strengthened

you could weld the gears but thats ALWAYS a BAD idea as it tends to both weaken the gears thru anealling and un-even heat treatment durring the welding and makes the car wear out rear tires fast if your street driving as theres no differance in the rear tires rpms in turns meaning both tires get worn fast or you ad a SPOOL, but the same rear tire problems remain, its just much stronger.and your still stuck with a weaker than ideal rear diff.

 

you could swap to a corvette REAR, DANA 44 IRS which solves both problems, and its a BIG improvement, but its not the strongest route

 

you could install a ford 9" or DANA 60 rear with a 4 link,rather than the INDEPENDENT REAR SUSPENSION its ALOT MORE work but its basically unbrakeable in a light car like a (Z) if its instaled correctly

 

http://www.turbobuicks.com/members/scottiegnz/vette-irs-swap.htm

 

the route you sellect depends mostly on your skill level and goals