z33 trans behind rb25 (Yes i know what you all are going to say) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

chris952jz · 05-28-2013, 07:28 PM

Has anyone seen the actual adapter plate made to run a z33 trans behind a rb25. Yes I know about the gear ratios and all that bs. My rear will be switched out to a 3.54 and it will have a fair sized turbo. now theoretically the 5 speed on that rear will have a low rpm and feel more sluggish in regular driving. now on the other hand the z33 should feel like it will pick up easier and still have that low rpm cruising gear for long distances. I run at decent highway speeds a lot and it gets old sitting at 3k rpm+. Now also Ive felt the ratio of the rb trans just doesn't seem right when making pulls to me but whenever I drive a z the rpm band always stays within its hardest pulling range throughout the gears, something I feel like my rb lacks. So where as the rb trans falls out of its pull the z trans wouldn't. Yes I know it has its costs but I also want to make this different and almost one of a kind. anyone who knows gearing and specifics of my idea please chime in. Id like to hear the opinions. I know its been gone over and I know everyone wants to just say stay with rb trans....but that's not the idea here. I know what the rb can take so I don't need that input.

nyc240sx · 05-29-2013, 02:40 AM

i have this setup with a z32 n/a gear box rb26 bellhousing mated to a rb25 s2
q45 rear diff 3.54 ratio...dont know about the z33 tranny if it will work

LooK · 05-29-2013, 02:51 AM

Make sure you get a later z33 Trans.. The first few years were garbage

chris952jz · 05-29-2013, 08:09 AM

yeah my buddies had both a 03 na z and now a twin turbo 06. the 03 was had mad gear grind issues after it hit 130k, the 06+ is the strongest and best ratioed in my opinion. pulls much better and has a lower rpm 6th for longer trips and highway driving which we all do a lot. I was going to find a 06-08 trans. and I know the speed sensors are sifferent but I will be running a speedhut cluster with the gps speedo so im not worried about al that plug n play bs.

05-28-2013, 07:28 PM	#1
chris952jz Join Date: Nov 2011 Location: calvert county MD Age: 29 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	z33 trans behind rb25 (Yes i know what you all are going to say) Has anyone seen the actual adapter plate made to run a z33 trans behind a rb25. Yes I know about the gear ratios and all that bs. My rear will be switched out to a 3.54 and it will have a fair sized turbo. now theoretically the 5 speed on that rear will have a low rpm and feel more sluggish in regular driving. now on the other hand the z33 should feel like it will pick up easier and still have that low rpm cruising gear for long distances. I run at decent highway speeds a lot and it gets old sitting at 3k rpm+. Now also Ive felt the ratio of the rb trans just doesn't seem right when making pulls to me but whenever I drive a z the rpm band always stays within its hardest pulling range throughout the gears, something I feel like my rb lacks. So where as the rb trans falls out of its pull the z trans wouldn't. Yes I know it has its costs but I also want to make this different and almost one of a kind. anyone who knows gearing and specifics of my idea please chime in. Id like to hear the opinions. I know its been gone over and I know everyone wants to just say stay with rb trans....but that's not the idea here. I know what the rb can take so I don't need that input.

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05-29-2013, 02:40 AM	#2
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	i have this setup with a z32 n/a gear box rb26 bellhousing mated to a rb25 s2 q45 rear diff 3.54 ratio...dont know about the z33 tranny if it will work

05-29-2013, 02:51 AM	#3
LooK Join Date: May 2013 Location: Chicago Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	Make sure you get a later z33 Trans.. The first few years were garbage

05-29-2013, 08:09 AM	#4
chris952jz Join Date: Nov 2011 Location: calvert county MD Age: 29 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	yeah my buddies had both a 03 na z and now a twin turbo 06. the 03 was had mad gear grind issues after it hit 130k, the 06+ is the strongest and best ratioed in my opinion. pulls much better and has a lower rpm 6th for longer trips and highway driving which we all do a lot. I was going to find a 06-08 trans. and I know the speed sensors are sifferent but I will be running a speedhut cluster with the gps speedo so im not worried about al that plug n play bs.