RB25DET Throw out Bearing Sleeve - Which do I need?

[Bxcliff]

I'm currently swapping an RB25DET Series 2 into my z32 chassis and I'm working on putting the transmission together and it was missing quite a few components. One of the things that I'm missing is the throw out bearing sleeve and to my knowledge, i know there are different types of sleeves in terms of bearing height (I.e 18mm vs 20mm). Since I am swapping this engine into a z32 chassis, I had to separate both the VG30DE trans and RB25DET trans and swap bellhousings in order for it to work in my car (The Vg transmission being used with the Rb bellhousing bolted to it).

 

My question is what throw out bearing sleeve would I need to order that would fit my transmission? If not, is there a way for me to measure something on the trans to get an idea which one would fit, or find a casting number on the original Rb trans I could take a look at?  The person I bought the engine/trans from says its from a 1993 Skyline GTS-T but that may or may not be true, I don't know 100%. I've asked a few websites, that sell different types for the RB, for their opinion and they couldn't really help.

Could anyone help point me in the right direction with this? Thanks in advance; any help is appreciated.

 

~ Here are links to two that may or may not fit my trans that I had already looked at ~

18mm: https://www.efisolutions.com.au/thrust-bearing-carrier-sleeve-18mm-r32-r33-r34-z33

20mm: https://www.efisolutions.com.au/thrust-bearing-carrier-sleeve-20mm-r31-r32-r33-r34

 

 

[GTSBoy]

Just get the one that says it suits RB25DET.