Torsion Bars swap?

[ChevyDave]

All this does is make your truck sit higher and have a heavy duty torsion bar right?

 

[tomb]

Okay, I checked my RPO code K2500 "Spring front, heavy duty" = RPO: F60. My truck has a rated GVW 8600 RPO code. If I were looking for boneyards t-bars I'd get them from a F60 RPO vehicle.

2000 K2500 RCLB with 3500 axles, Hummer rims and 315 70R17s (poor mans project)

 

[MYT HI]

I got 2500 torsion bars and set of rear leafs for 150.


Sent from underneath my truck

 

[kamokevin]

Wrong thread

 

[michael hurd]

List of torsion bars:

CHEVY TORSION BAR CODES AND RATINGS:

15048307-LH (code XK) (Max torque 4553)
15048308-RH (code XK) (Max torque 4553)

15048309-LH (code XL) (Max torque 4626)
15048310-RH (code XL) (Max torque 4626)

15712407-LH (code WX) (Max torque 4863)
15712408-RH (code WX) (Max torque 4863)

15048311-LH (code XM) (Max torque 5638)
15048312-RH (code XM) (Max torque 5638)

15058267-LH (code YH) (Max torque 5913)
15058268-RH (code YH) (Max torque 5913)

15712409-LH (code WY) (Max torque 5913)
15712410-RH (code WY) (Max torque 5913)

15528957-LH (code GG) (Max torque 6709)
15528958-RH (code GG) (Max torque 6709)

15712411-LH (code WZ) (Max torque 7267)
15712412-RH (code WZ) (Max torque 7267)

15528963-LH (code GK) (Max torque 8615)
15528964-RH (code GK) (Max torque 8615)

15528965-LH (code GL) (Max torque 8782)
15528966-RH (code GL) (Max torque 8782)

15732338-LH (code XG) (Max torque 9054)
15732339-RH (code XG) (Max torque 9054)

15528959-LH (code GH) (Max torque 7161)
15528960-RH (code GH) (Max torque 7161)

My K1500 came equipped with GH torsion bars from factory, and I think it could be a tad stiffer yet, although I don't have heavy tires on wide offset wheels or a plow, or even a diesel. What might be stiff for one person, may be weaksauce for another... tastes vary.

Unless you check the codes, you don't know what you have in the truck.

The stiffest bars would be XG, GM does not make any stiffer.

 

[tomb]

Cool, seems like a weekend project unless you have air tools.

 

[Hyperti2]

List of torsion bars:
The stiffest bars would be XG, GM does not make any stiffer.

Dumb question but where would i find out which ones my truck has?

 

[tomb]

Many still have stickers directly on the t-bar. It should also be on the RPO sticker, the t-bar codes are the last two digits of the RPO code. My code is YGK... Im assuming t-bar codes start with "Y"

2000 K2500 RCLB with 3500 axles, Hummer rims and 315 70R17s (poor mans project)

 

[Hyperti2]

Ill jump under there and look in the morning then

 

[tomb]

There is something about swapping torsion bars that bothers me. If your truck has a specific symptom like sitting too low, how do you know if the original equipment was not damaged/ overloaded? Maybe replacing them with the exact same rated t-bars would fix the problem. I can see if your truck had a plow kit installed. The kit weight should be added to the GVW to determine the proper t-bar. If designing any spring dependant system you have to consider the application. For example:
Imagine if a garage door was hard to lift, you dont go buy the biggest springs you can find... you have to weigh the door (un-sprung) then purchase springs for that weight range.
Okay now that I said all that, if you are trying to make the ride stiff wouldn't it take thicker t-bar or bar of a slightly different metal composition for the correct vehicle weight?

2000 K2500 RCLB with 3500 axles, Hummer rims and 315 70R17s (poor mans project)