Tailshaft Mod For Rb25 Box Into R32?

[mr_rbman]

Now everyone i know thats put a 25 box in there 32 has had to weld the 25 tailshaft yoke onto the 20 tailshaft right?!?

Well i received my 25 yoke in the post and it just came with one half of the uni joint and i thought great now i have to find the other half of the uni joint and tailshaft. but now that i've pulled out my 20 tailshaft the uni joints look identical and measure up to be identical.

So what i'm wondering is seeing as though my car was a factory manual and i don't need to modify the length of my tailshaft could i get away without welding the yoke to the tailshaft and just connect the rb20 uni joint to the rb25 uni joint, so that i basically end up with the 25 tailshaft yoke and one half of the uni joint connected to the 20 tailshaft and other half of the 20 uni joint?

Cheers!

[45ULT]

yeah im keen to find this out too as im about to do the conversion..

[bubba]

Makes no difference whether you swap the uni or weld after the uni.. I think the deal is that those uni's are not rebuildable (or so the guy at VEEM told me) as such they require some abuse to get out and you would need to source a brand new uni.. aslong as the uni isn't rooted it's usually easier to get it cut/welded and rebalanced.

[BigC1988]

I'm about to swap my RB20de witha RB25det. I'm still going to use my Rb20 gearbox. Will I still have to "change" my drift shaft or can I use my old drive shaft since it the same gearbox??se s

[rinmak]

Same tailshaft can be used BigC ^^^

[BigC1988]

Same tailshaft can be used BigC ^^^

À friend of mine just told me that the gearbox wont hold the HP of the engine (planning on boosting 20psi). So I will use the RB25 gearbox. What should I do??

Thanks for the help

[bubba]

Search for all the RB25 into R32 threads and read them, you'll need to modify your tailshaft and speedo drive along with the gearbox mounts.