Lowering just the rear of an 84 c10

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,948
Reaction score
25,339
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
I could have been right. Lol

He said he uses it for work, and wanted to lower the rear 2". Tell me that doesn't say squat to you. Lol
Lol maybe. I have reverse sqat, im way low in the front and ass high. I plan on BB coils when i do my 6 lug rotor conversion though
 

MikeB

Full Access Member
Joined
Apr 4, 2014
Posts
1,775
Reaction score
1,004
Location
North Texas
First Name
Mike
Truck Year
1969
Truck Model
C10
Engine Size
355
ok drop shackle it is. once the height is set I will measure for a new shock or get extensions for the stock ones.

If you drop only the rear of the leaf springs, the pinion yoke will be pointed downward a little more, so you might want to consider pinion shims. On my 82 C10 I installed dropped hangers, but not shackles, and had to use 4 degree shims to get the driveline geometry correct.

Also, if not mentioned above, you will have to notch a bed floor support to clear the longer shackles. Something I wouldn't try unless the bed was upside down in my garage.

https://www.speedwaymotors.com/Leaf-Spring-Pinion-Angle-Shims,3354.html
 

MikeB

Full Access Member
Joined
Apr 4, 2014
Posts
1,775
Reaction score
1,004
Location
North Texas
First Name
Mike
Truck Year
1969
Truck Model
C10
Engine Size
355
If you only use a drop shackle you only lower one side of the spring, effectively cutting your drop in half. 2" drop shackle is actually 1" of measured drop.

I have not played with drop shackles in many years but that's how I recall it going down.
Well, most "dropped" shackles raise the rear spring eyelet by 3.5" - 4.0", which equals 1.75" - 2.0" at the axle.

So, 2" dropped shackle actually means 2" at the axle.
 

wixthedog

Junior Member
Joined
Nov 13, 2019
Posts
29
Reaction score
13
Location
Magnolia, Texas
First Name
Mike
Truck Year
1976
Truck Model
C10
Engine Size
350
That could be the confusion, back when I was using shackles I was lifting - not lowering!
 

Brett77

Full Access Member
Joined
Feb 12, 2018
Posts
53
Reaction score
28
Location
Glendale AZ
First Name
Brett
Truck Year
1977
Truck Model
c10
Engine Size
502 stroker
I agree with Bluex just make sure you notch the bed crossmember at rear where hanger goes it will clear sitting but will rub as drive.
 

MikeB

Full Access Member
Joined
Apr 4, 2014
Posts
1,775
Reaction score
1,004
Location
North Texas
First Name
Mike
Truck Year
1969
Truck Model
C10
Engine Size
355
That could be the confusion, back when I was using shackles I was lifting - not lowering!
I remember those days, when it was popular to jack up cars in the back. And sometimes using longer shackles to compensate for sagging springs. Cheap fixes for kids on a very tight budget!
 

Latest posts

Forum statistics

Threads
44,160
Posts
950,626
Members
36,273
Latest member
dannyphx
Top