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Sometimes called a "lower control arm" (LCA), the transverse link is the lower suspension member. The Tension Rod (castor rod) bolts to it, as do the Ball Joints. The inner end of the LCA bolts to the front Crossmember.

Also see Front_Suspension

1 Overview
2 Racing
3 Upgrading
- 3.1 Late 1200 vs Early 1200
- 3.2 B310/A10
4 Part Numbers
5 Photo Index

Overview

The inner end of the LCA bolts to the front Crossmember:

B310 and B110 LCA are virtually identical

With B310 Ball Joints, the B310 Knuckle Arm fits, which will bolt to most Datsun-Nissan struts such as Stanza, 280ZX, etc.

Bushings: Stock vs Poly comparo

Racing

Racing heim joints on LCA

Custom LCA

Upgrading

Late 1200 vs Early 1200

Later utes

B310/A10

B310 (Sunny/210) LCA and A10 (Violet/Stanza) LCA are the same.

Stanza struts increase the track ~32mm -- too far to be registered in ACT.

per side
+8mm strut/hub offset
+8mm ball joint offset

Some say it increases track ~50 mm.

B310 vs B110 lower arms

As for the lower arms, they are indeed the same length. With the exception of the diameter of the bolts which hold the ball joint to them ...they are the same. However the [B]310 arms are made of a slightly heavier construction, so it would be a toss up between strength verses weight, when chosing which arms to use.
Utes ... use the bigger bolts like the [B]310's.
A14force

Backfire said the ball joint bolt pattern is smaller in B110 vs B310.

late ute ball joints (left) to stanza ball joints

Both fit late 1200 or Stanza/B310 LCAs. Depending on how much track you want.

The Stanza/B310 ball joint uses a larger diameter taper than B110.

Part Numbers

NOTE: All parts are identical for 1971-1973 models (including sedan, coupe, wagon and truck).

54110-H1060 Transverse link ass'y R.H (formerly H1000)
54111-H1060 Transverse link ass'y L.H (formerly H1000)
54131-H1000 tranverse link bushing $10.83 USD

These parts also fits 1973-1975 B210 w/A12 engine.

Early LCA uses these for Ball Joints:

40160-H1000 BALL JOINT ASS'Y-lower 
fastening ball joint to knuckle arm
 08911-44210 NUT
fastening ball joint to LCA
 40178-H1000 BOLT "A" (2)
 40179-H1000 BOLT "B" (6)
 08911-60810 NUT (6)
 08915-13810 WASHER-lock (8)

1974-up B120 Truck

54100-H8500 ARM ASSY-LOWER RH 7712-8503
 superceded 54100-H7400* ARM ASSY-LOWER RH 7510-7711
54110-W5851 ARM ASSY-LOWER RH 8504-
54101-H8500 ARM ASSY-LOWER RH 7712-85037510-7711
 superseded 54101-H7400* ARM ASSY-LOWER LH 
54111-W5851 ARM ASSY-LOWER RH 8504-

Late LCA uses this ball joint:

40160-H7400 JOINT ASSY-BALL LOWER (2) 7510-
fastening ball joint to knuckle arm
 40177-H7400 NUT
fastening ball joint to LCA
 54480A outer tension rod bolt
  40178-H7400 BOLT 7510- (2)
 54480B inner tension rod bolt
  40179-H7400 BOLT 7510-7711 (4)
  40179-W5000 BOLT 7712- (4)
  08915-13810 WASHER 
  08911-10810 NUT
 40160B outer ball joint bolts
  40179-H7400 BOLT 7510-7711 (2)
  40179-W5000 BOLT 7712- (2)
  08915-14010 WASHER
  08911-64010 NUT

B210 JAPAN

54100-H1060 LINK ASS'Y-transverse with bushing (R.H.)
54101-H1060 LINK ASS'Y-transverse with bushing (L.H.)
40160-H1000 BALL JOINT ASS'Y-lower, front suspension
 08911-42210 NUT [castle]
 40178-H1000 BOLT (2)
 40179-H1000 BOLT (6)
 08911-60810 NUT (6)
 08915-13810 WASHER-lock (6)

B211 A12S + A14 (from 75-12) + B210 VAN (from 75-10)
54100-H7400 LINK ASS'Y-transverse with bushing (R.H.) -7711
54100-H8500 ARM ASSY-LOWER RH 7712-
54101-H7400 LINK ASS'Y-transverse with bushing (L.H.) -7711
54101-H8500 ARM ASSY-LOWER LH 7712-
40160-H7400 BALL JOINT ASS'Y-lower, front suspension
 40177-H7400 NUT [castle]
 40178-H7400 BOLT (2)
 40179-H7400 BOLT (6)
 08911-60410 NUT (8)
 08915-14010 WASHER-lock (8)

B310 JAPAN

54529
54100-H8500 ARM ASSY-LOWER RH B310
54530
54101-H8500 ARM ASSY-LOWER LH B310

B310 use one LCA, but two different ball joints. The parts catalog is ambiguous on usage.

40160-H7400 JOINT ASSY-BALL LOWER RH [short type]
 S,K A12S,A13S
 Van
40160-W5000 JOINT ASSY-BALL LOWER RH [long type]
 S,K.A14,A15
 Wagon [W=Sunny California from introduction Jan 1979-]
40178-H7400 BOLT (2)
40179-W5000 BOLT (4 OR 6)
08911-60410 NUT (8)
08915-14010 WASHER-lock (8)

All B210,B120 and B310 use the same LCA bushing as B110.