5 speed in a NK

[alumanorm]

I'm wanting to install a 5 speed in my 2000cs.  The quibo is on the rear of the drive shaft.  Is there a write-up on how to do this conversion?

 

Thank you

 

Norm

[mich02]

Hi Norm, 

 

I assume that you have a long neck diff. It's a pain I think. I just did it on my nk. 

 

I had to fabricate a disc to convert a 4 piece drive shaft to the 3 piec diff. I am using a drive shaft from a e21.

 

 

[NickVyse]

The NK transmission tunnel got larger later in life, no idea how this relates to the coupes. But the early NK tunnel is VERY tight for a 5 speed and you can only fit the getrag 245 as the 240 has more bulk higher up and simply won't go in. 

 

What year is your car and does it has the short neck as Mich says or a side loader diff? If it's a side loader with a 4 bolt flange it will be much easier. I actually found an e21 prop that fitted with a small amount of cutting to make the sliding joint slide a little closer, so no balancing required and a DIY job (make sure you mark how they slide together so you can put it back on the same splines). Then it's simply a matter of a making up a bracket for the gearbox and relocating the centre support bearing (probably - my car didn't have one to begin with). Oh, and shorten the gear selector. 

 

Few pics of what I did here: http://www.m2bmw.com/derbyNKresto.htm

[NickVyse]

On 3/14/2017 at 8:53 PM, alumanorm said:

The quibo is on the rear of the drive shaft. 

 

Just re-read your post - sounds like you have long neck 3 bolt diff if you have a gumbo at that end, but check everything. Lots of variables. 

[alumanorm]

Thanks guys for responding back to me.   Yes I do have a long neck with a guibo on the rear.   Would it be possible to use a guibo on both ends?   

 

Norm

[NickVyse]

5 hours ago, alumanorm said:

Thanks guys for responding back to me.   Yes I do have a long neck with a guibo on the rear.   Would it be possible to use a guibo on both ends?   

 

Norm

 

no reason why not. my '67 1600-2 came with 3 of them!

[alumanorm]

Is a 6 bolt guibo better for the front?   And then just use the stock center bearing?

 

Norm

[Hans]

See what is on the back of the transmission, and go from there. You can have a 4 bolt front on a three bolt rear. A 5 speed CR fits in CS with minimal hammering as I recall