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Revision as of 23:12, 26 April 2016

Datsun 1200 used the tried and true leaf spring rear suspension, which was common among most cars - including american cars - in the early 1970s. Also known as blade springs or cart springs.

1 Overview
2 Spring Specifications
3 Leaf Mounting
- 3.1 Spring Seat
- 3.2 U-bolts
4 Bound Bumpers
5 Torque Arrester
6 Bushings
- 6.1 Make your own
- 6.2 Aftermarket
7 Lowering Springs
8 120Y Springs
- 8.1 Isoclamp
9 Alternative Leaf Springs

Overview

Sedan and Coupe use the same leaf-pack.

VB110 Wagon came with heavy-duty spring pack.

The B120 1200 Truck came with standard or optional (heavy-duty) rear leaf springs. Standard was a 4-leaf pack, while optional was a 5-leaf pack with a stiffer spring rate.

55020-H1000 Sedan, Coupe $159 USD
55020-H1400 Van (heavy duty)
55020-G1000 Truck 4-leaf early
55020-G1001 Truck 4-leaf 7510-
55020-G1002 Truck 4-leaf 8504-
55020-G1060 Truck 5-leaf 7804-8503
55020-G1061 Truck 5-leaf 7804-8503 8504-

Ute 4-leaf pack Type 1

Ute 4-leaf pack Type 2 (2nd leaf overlaps 1st leaf)

Rear Shackle is same for all 1200s

Front 3-point Mount Plate (Sedan, Coupe)

Sedan rear shackle pin bracket

Details (truck, Pin front mount)

Truck rear shackle pin bracket

Truck front leaf pin

Custom adjustable shackles

Spring Specifications

All 1200 springs are: 1110 mm long, 50mm wide

Spring Rate
See Spring_Rates#Rear_Spring_Rate

Spring Eye Diameter
* Coupe, Sedan, Van: 35mm front,  23mm rear

Sedan, Coupe
* 3 leaf: 1 x 6mm thick, 2 x 7mm thick

Van 
* 4 leaf std: 3 x 6mm thick, 1 x 13mm thick
* 4 leaf H-D: 2 x 6mm thick, 1 x 7mm thick, 1 x 11mm thick

Truck 
* 4 leaf: 2 x 6mm thick, 1 x 7mm thick, 1 x 13mm thick
* 5 leaf: 2 x 6mm thick, 1 x 7mm thick, 2 x 10mm thick

Free Camber
* Sedan, Coupe: 109mm +-3
* Van         : 131mm +-5
* Truck       : 118.5 mm 

Laden Camber
* Sedan, Coupe: 11mm @ 192kg
* Van: 11mm @ 295kg
* Truck std 4-leaf: 18.5mm @ 267kg
* Truck HD 5-leaf:  15.1mm @ 376kg

Free Camber 'S'
* Truck: 118.5 mm

post

Leaf Mounting

Also see: Shocks#Mounting

B110 mounts leaf directly to metal (unlike B10 and B210 which use rubber-based isoclamp).

Rear axle mounting

Spring Seat

Spring Seat Assembly
Sedan: 55262-H1001 
Truck: 55262-G1000 (RH) 12mm shock Nut wide u-bolt
Van:   55262-H1401 (RH) 12mm shock Nut narrow u-bolt
       55262-H1402 (RH)   (from '73-6)
Coupe: 55262-H1801 (RH)  8mm shock Nut
       55262-H1802 (RH)   (from '73-5)

Also see Shock absorbers

H10 Sedan (plain seat without shock stud)

G10 B120 Truck large stud for shock + large U-joints

H18 Coupe small stud for shock
 post

Sedan and Coupe parts

U-bolts

U-bolts
55247-H1002 CLIP-rear spring Sedan, Coupe.USA
55240-H1800 Coupe.JPM.early 
55247-H1401 CLIP-rear spring Van, Coupe.JDM.late
55247-G1000 CLIP-REAR SPRING Truck 4-leaf
55247-G1060 CLIP-REAR SPRING Truck 5-leaf 7804-

Fasteners for U-bolts (Sedan,Coupe,Van,Truck)
08911-64010 NUT-HEX M10 x 1.25 8
08915-14010 WASHER-spring lock 8

Sedan

Ute U-bolts (same M10 diameter but wider spacing for larger axle tube)

Ute U-bolts fit over 62 mm axle housings (62 mm inside diameter)

Bound Bumpers

Coupe, Truck & Van rear suspension bumper (above the axle housing)
55240-G1900 ASSY-BUMPER REAR AXLE > 55240-H1800 > 55240-H1400
08911-64010 NUT-HEX M10X1.25
08915-14010 WASHER-SPRING LOCK

Sedan rear suspension bumper (on the Shocks)
55240-H1001 BOUND BUMPER A
56124-H1001 BOUND-BUMPER B

Truck Bound Bumper
post

Torque Arrester

The Torque Arrester (pinion snubber) is a rubber bumper that prevents the leafs from rotating too much under torque input.

See Rear Axle

Bushings

5 55044-H1001 front upper Sedan, Coupe
  * superseded by 55044-H5001 $4.90 USD
  
6 55045-H1000 front lower Sedan, Coupe [leaf eye, course] $3.63 USD

17 55046-H1000 rear upper $2.27 USD
  
18 55047-H1000 rear lower [leaf eye, plain] $1.22 USD

NOTE: B210 USA uses the same bushes as 1200 Coupe/Sedan.

Wagon & Ute

V 55045-H1400 front Van, Truck [leaf eye, fine] $4.25 USD

55044-H5001


Ute/Van complete set

Make your own

Or, make your own performance bushings per Nissan Competition book:

- I went to a local platics place and bought a piece of

Aftermarket

Or, get stiff aftermarket bushings:

I got in touch with MADDAT.COM and they knew exactly what I was looking for. They had it in stock from Super Pro (yes they're polyurethane), sent them right out, and I received them 8 days later here in Arizona, USA. Tamra from the sales department was easy to work with and very helpful. I would recommend these guys to anyone who needs parts for their 1200. Front spring eye bushing on rear leaf spring

Polyurethane bushings out of Mexico: Parbo

SuperPro Bushings