Questions Regarding RB26DETT Tranny

[KaosMan]

What Skyline tranny is needed for a RWD RB26DETT swap into a 280z? I've searched as best as I could, and am unclear on which tranny I can use. The places I've found online have the RB26DETT & tranny from the same car, but don't say if its AWD, RWD, etc.

I'm assuming I will need the RB25DETT RWD tranny to go with the engine. There is a shop up in Canada that sells this hybrid setup for $4900 USD, is this too steep or about right?

Also, isn't the front diff built into the engine oil pan? Is there any aftermarket pan replacements if thats the case? Or can I use a pan off of the RB25DETT?

Thanks for any help anyone can provide!

[Cuong Nguyen]

Hi All,

there is lots of info on RB engine swaps into zeds on www.hybridz.org so try doing a search there.

You will need either a RB20DET or RB25DET gearbox, both of these are RWD and there isnt such an engine as a RB25DETT.

The RB25DET gearbox is much wider/larger/stronger than the RB20DET one, but as such you will need to modify the "ears" in the zeds transmission tunnel to be able to mount the gearbox.

The oil sump needs to be from a RWD RB series engine. This will need to be modified (cut and shut etc) to clear the zeds steering rack and also the oil pick up mounting point on the RB26DETT block. As the RB26DETT block is double drilled, there is no problem to bolting on the RWD metal sump!

Hope that helps,

Cuong

[280zx Fever]

the rb25det box is the same as the rb26dett just no transfer case

[mull]

the rb25det box is the same as the rb26dett just no transfer case

So how come the 26 is 6-speed and the 25 is 5-speed... ? :surprised

[Alfadog]

I guess he could be referring to the older RB26 gearboxes, which were 5-speed too?

[Gav240z]

Isn't the S14 Sr20 Silvia gearbox fairly easy to adapt to the Z? Just a bell housing change I think. I am wondering if the S15 6 Speed would work just as well. That would be really good in a Z and strong