engine and drivetrain Still looking for long neck diff 3:64:1

[Brandyn Andrews]

Ok! Haven't got any idea how much a long neck diff 3:64:1 goes for. But I need one.  So get back to me guy's. I can't commit if the diff don't fit. I'm in central California i can drive to bay area and other places. Thanks again.

[TobyB]

Well, I don't have one.

 

Try Gordon, in northern Oregon.

He goes by Gracer here.

 

Or swap your rear subframe and go shortneck.  Most of the kids did that back in the 70's.

 

t

 

[Brandyn Andrews]

Nice! I appreciate it. Will try Gracer. Actually had given complete swap some thought. I have a pre import 1800 and some things seem to be different. Need more info. Still possible though. Thanks for info.

[e21]

I have one but I am in NH. I suppose if you really need it we could look into shipping but I'm not sure it would be worth it for you. Let me know. Mike

[ClayW]

You could have one built. It won't be cheap, but the gear sizes are the same for all diffs up through the 4 cylinder E36 cars. If you can find a diff builder familiar with the longnecks, you could swap in any gear ratio you want.

[arminyack]

I have one ..I'm in Socal. Let me confirm its a 3.64 however.....

[Mark92131]

Mine is a 4:11, sorry!

 

Mark92131

 

 

 

 

[NickVyse]

presume this is for an NK? a 3.64 is quite long for an NK, esp with an 1800. sorry if I'm telling you something you already know. 

[Brandyn Andrews]

Hello Nick,tell me what you really think. The original owner seized the stock 1800 motor, then he installed a 2002ti motor with all 1800 motors external components like( intake and exhaust,) and I installed a lynks single side draft and a Top End header. (Less restriction).  At the same time he installed a 320i automatic 3 speed. The original trans has disappeared. Though I have the origanal 1800 block(seized). Wasn't part of origanal purchase of vehicle. But managed find it baried in the hanger!   Long\short  this girl has short legs.   Was my thought that a diff closer to a 320i would drop the RPM enough to stop  my whinsing. Thanks for you opinion.  Its a damb eighteenfrankin. Thanks.LMK

,

[gracer]

I do have a 3:64.  $100.00 you pay the shipping.  Do you want it with the 1800 input flange? You can E-mail me

@ gracer25@msn.com  G

[Brandyn Andrews]

OK! Hold on! Does anyone know if a ZF 4hp22 will fit trans tunnel of an 1800????  HI-YA. Good grief?    A 3:64:1 on average would only give 500rpm reduction. But a 4 speed zf  has 4th gear and 1000 rpm extra may be the way togo?  Any thoughts???

[NickVyse]

If you do a lot of motorway cruising and you only have the 3 speed auto then may be it's a good ratio. Don't forget the NK has larger wheels than an 02 or an e21 and it makes quite a bit of difference. No idea how the 4hp22 compares in size to the old 3 speed, but that box with a 4.11 would be a great combination in an NK.  

Edited June 17, 2016 by NickVyse

[Brandyn Andrews]

Are you saying that 4speed  and 4:11:1   would be great? Because I like the ratios better with 4speed transmission.  A 3:64: diff gives only 500 extra rpm. Seems I better look at 4speed trans and get measurements. LMK thanks.  Brandyn

[arminyack]

4.11 would be more lively around town.....but not so great on the freeway with a 4 speed. Your 2002 motor would feel like its going to blow up @70 mph.

[NickVyse]

Double check the 4th gear ratio on the 4hp22 box - it's described as an over drive automatic so I have always (naturally) assumed that 4th is an OD ratio. If so then yes, it's a perfect combo in an NK and similar to a 5 speed OD and a 3.9:1 ratio in an 02 with its smaller wheels. 

 

Here's my NK cruising at 150kph/about 93mph (1600 speedo reads slightly slow as it's calibrated for an even shorter rear end) with a 5 speed OD and 4.11:1 back end and 195x70 14" tyres.