is there much or any difference

Internally, no.

 

Fitment, yes. In regards to the Bellhousing and Prop splines.

 

Its not difficult to retrofit though.

 

Which are you looking at doing ...fitting NA box to a TT or TT box to an NA ?

Na box to tt engine cheers

ok, the NA bellhousing is thicker than the TT bellhousing. Bascially Nissan altered the bellhousing for the TT to accommodate the TT Flywheel & clutch, and this is something you would have to do if you wanted to fit a NA box and use TT clutch and flywheel.

 

You only need to grind out a few mm from around the inside, mostly around the starter motor opening to prevent the larger TT flywheel from fouling.

 

You will then need to shim out the starter motor by a few mm , and use the Front half of an NA manual propshaft, which can be mated up to your existing rear prop half.

 

You would also require a TT Speedsensor geared cog for the speedo to read correctly (if you have TT rear diff still)

 

Ultimately its extra work and hassle, so it all depends on how cheap you can get a NA box compared to a TT box.

Edited September 8, 201114 yr by Yowser

Ok got the na box from the current set up on the hillclimb car...plan to put tt lump in this closed season already been running the tt clutch and fly so have that clearance and was going to use one of Jeffs single piece props

Ok got the na box from the current set up on the hillclimb car...plan to put tt lump in this closed season already been running the tt clutch and fly so have that clearance and was going to use one of Jeffs single piece props

 

ok, in that case you presumably have the NA rear diff?, If so then you just need a NA Single Piece prop from Jeff.

 

Here is a pic, courtesy of Slick Pete of the what needs to be ground away a little within the NA bellhousing.

 

 

it doesn't require much, I didn't take any measurements when i did mine just ground it down a little and have had no clearance issues.

 

The TT flywheel has a 4mm larger diameter (2mm radius), which you'll need to shim the starter out too with a 2mm washer on each stud.

Edited September 8, 201114 yr by Yowser

Nice one cheers will post pics as I progress through

good thread this as it goy me thinking ..so if fitting a NA diff to a TT or Diff leader gear set in my case , would i need to change the speed sensor also ?.......

Haven't found a zed speedo that accurate anyway would it matter :)