Rb25 Box In Ceff

[daisu]

I just put an RB25 box in my ceff behind the RB20.

Didn't realise it was going to push the shifter back that far. I had to cut a chunk out of the floor pan for the shift to come up.

My crossmember I had on the RB20 box (S13 manual crossmember, stamped B) was going to require drilling/extra brackets etc to make it fit. I used a crossmember stamped A and it fit perfect.

Getting the gearbox mounted up against the engine was a real pain in the arse, would definitely remove the engine and do it on the floor then lift it back in as 1.

[brada31ke70]

that is strange you said your shifter had to move back, my 25 gear box shifter is actually infront of where the 20 shifter was and actually had to lengthen the drive shaft, it is behind a rb30 but am running a rb20 engine mounts. if you remove your intercooler hoses and tilt your motor back stightly it goes in easy.

[daisu]

Yeah I ended up having to loosen my engine mounts and had the engine tilted up against the firewall.

If it makes a difference, mine was factory auto.

I'm assuming different engine/engine mount combos would change the position of the motor?

[Nic_A31]

When converting to RB25 (engine), sometimes the crossmembers "needs slight adjusting" - so I guess factory auto/manual dictates where the shifter comes up ?