Crank the bars

[Dropmaster]

How many turns on the torsion bars does it take to lower a 79 620 pickup? I cranked them out like 30 turns and I can't tell any difference. I am hoping to get about 4 or 5 inches down.

[Pacific coast Datsun]

Typically 4-5 turns = 1 inch.

What bolts are you turning ?

[69FJWagon]

I know it seems like common sense but the first time I did it it didnt change anything until I realized that on top under the 30 plus years of grease and grime is two nuts loosen the jam nut and hold the bottom nut while turning the adjuster...

[Dropmaster]

I loosened the bolts that are on the "T-Bar" keys. I did not loosen the 2 other bolts.

[Pacific coast Datsun]

Clayton brought up a good point. Theres 2 nuts on top of the long bolt, put a wrench on the bottom nut as you turn the bolt.

What i do is mark 1 side of the bolt & count how many times it rotates.

[datzenmike]

This is the anchor arm:

 

The anchor bolt holds a half moon shaped anchor pivot against the bottom of the anchor arm. On top, next is the round bottomed anchor adjusting seat followed by the nut and lock nut on top.

 

 

You may find that you run out of threads before lowering as far as you want. If this is the case the torsion bar can be removed and rotated counter clockwise and re-installed. (clock wise on the other side) This will move it upwards like the one on the far right and allow more adjustment on the anchor bolt. You may at this point be so low that the rubber bump stop will need to be trimmed or removed. Removal is not really a good idea.

[Dropmaster]

Thanks, I will try that when I get off work.

[Grey_Matter]

This is the anchor arm:

 

The anchor bolt holds a half moon shaped anchor pivot against the bottom of the anchor arm. On top, next is the round bottomed anchor adjusting seat followed by the nut and lock nut on top.

 

 

You may find that you run out of threads before lowering as far as you want. If this is the case the torsion bar can be removed and rotated counter clockwise and re-installed. (clock wise on the other side) This will move it upwards like the one on the far right and allow more adjustment on the anchor bolt. You may at this point be so low that the rubber bump stop will need to be trimmed or removed. Removal is not really a good idea.

 

those pics are awesome for the comparison of a torsion bar that has been turned versus one that hasnt

[datsunaholic]

When I turned mine down the difference was obvious... even up on ramps, I managed to set the truck on my chest and had a heck of a time extracting myself. I got about 4 inches on the bars alone, but was pretty much right on the bump stops.

[Dropmaster]

Thanks a million! I did just what you guys said and the truck came down just like I wanted. I gonna pick up some blocks for the rear Friday.