Stronger Uj / Diff Flange For R200 Longnose?

[Dan260Z]

Hey guys,finally back on here after a rough time dealing with my daughter's health last year.

 

Doing an RB25DET conv in my 74 2+2, and was about to get a custom tailshaft made using my original zed shaft and an R33 one that came with my R33 turbo box. Only I've noticed the zed UJ at the diff end looks tiny with equally small 8mm bolts... are there any larger flanges that bolt staight onto longnose R200's to allow me to run a bigger UJ?

Would the flange off a modern short nose R200 fit? Eg. An R33 one?

 

Or is the old zed item deceptively strong and therefore ok to deal with the new engine's torque?

[PB260Z]

Hi Mate

 

I don't recall reading any threads about people with RB powered Z's having problems with factory ones.

So guessing they are OK, assuming they are in good condition.

 

 

Anyone else got a comment ?

 

Cheers

 

PB

Edited March 1, 2017 by PB260Z

[KatoKid]

Later R200's have bigger flanges and bolts and you can swap them easy enough.

 

http://forums.hybridz.org/topic/75675-r180-to-r200-pinion-flange-question/

 

 

Edited March 1, 2017 by KatoKid

[Dan260Z]

Awesome thanks.  So to confirm - are the input shaft size and spline count the same on old longnose R200s as they are on newer short nose ones?  

Read through the link and couldn't ascertain that (and I stupidly threw out an old gutted S15 R200 shortnose I had laying around a few months ago, or else AI could have just tried the flange on my long nose!)

[KatoKid]

Yep, input shaft size and spline count are the same

[44014]

Yep, input shaft size and spline count are the same

 

Really? I posted a topic asking this not 3 months ago and no one could answer me? So i could get a 1 piece r33 tail shaft. it will slide straight into my factory box and them if i use the short-nose flange i can just have the tail shaft shortened to my spec?

[KatoKid]

I swapped flanges from what I was told was a later model viscous LSD R200 to an earlier one with no problems. Just my experience, but cant be 100% guaranteed because I'm only going off what I was told by the sellers.

[Dan260Z]

Awesome guys, Jeff at knox driveshaft also said not to worry about checking input shaft size and spline count so from that I gather they're mostly the same?

Reckons he can supply a complete new shaft, all new bits inc. Slip yoke and a bigger diff flange for somewhere around $500 (TBC).

[KatoKid]

Haha....small world, Jeff did my hybrid BMW/Datsun drive shaft!

 

He has some pics of his blue 240/260 on the wall in his workshop 

[Dan260Z]

Nice!  Good to know he's a zed guy too!

 

Didn't get time to take the measurements he wanted last night but will hopefully email it all to him over the weekend.

Will keep the thread updated on how it turns out and which diff flange and UJ's he uses.

[Dan260Z]

So the order was placed last week, hopefully within a week or so Jeff has a new tailshaft for me!

 

He reckons that the stock rectangular diff input flange can remain, and he'll use a bigger UJ and end bit on the tailshaft (whatever it's called) that will mate to the stock input flange.  Apparently the 8mm bolts wont be a problem (I'll replace my damaged old bolts with high tensile new ones however).

Opted for the "all new" option.  Jeff said I could save a couple hundred by reusing the skyline slip yoke and UJ, and I believe the end of the stock zed tailshaft... however since the UJ isn't replaceable (and mine already has signs of notchiness) I preferred to go with a new, serviceable yoke and the bigger diff-end UJ.