School me on truck frames- do they twist?

**CondoCruiser** · 06.13.2012

They are designed to twist. That's one reason they don't want you welding on the frame as it's heat treated for strength. When you have 500HP on a rotating shaft transferring to an axle, something has to give. All them rubber bushings and mounts play a role in cushioning the transfer of force.

If you plan on off road, it is very easy to get one stuck on flat ground with a small rut if you are sitting on it. I would think a single axle would perform much better than a dual because there is no dead axle to lift the drive wheels off the ground in changing terrain.

**prenn** · 06.13.2012

Originally Posted by vijay

Now, for the other question. Do you know any one/shop around West coast (NorCal) that can stretch a class 8 frame?

there are plenty of shops around, where exactly are you?

**Scania man** · 06.14.2012

A single drive is better as Long as the ground beneath is sufficiently solid to support it, on snow and ice a rear lift axle has far more traction than a dual drive, that's the reason most trucks from the Nordic regions are rear lift and when they have dual drives the rearmost axle will lift on that too, they are pretty good of forestry roads too but you can't beat a dual drive on lockers if the ground gets soft.

I would imagine that your chassis would have more flex than ours cos of the length of your chassis , ours are quiete short in comparison which would limit the amount of flex we could get.

**Junkyard Johnney** · 06.14.2012

Take a look at this, http://www.westcoastframe.com/ , Sacramento,Ca boys nice set up.
J-J

**Quickfarms** · 06.14.2012

Interesting

**superhauler** · 06.15.2012

your on the right track, the longer a frame is the more it will flex the shorter it is the stiffer it will be.

**vijay** · 06.15.2012

Originally Posted by prenn

there are plenty of shops around, where exactly are you?

Hello there, I'm in SFO bay area. Any good reference (local to me)?

**vijay** · 06.15.2012

Originally Posted by Junkyard Johnney

Take a look at this, http://www.westcoastframe.com/ , Sacramento,Ca boys nice set up.
J-J

I called and spoke to them, they have asked me to call back. What kind of $ amount are we looking at here? Just for my reference, in case some other company decides to take me for a ride.

**Pablo-UA** · 06.15.2012

reaaly there are enforsed frames for oil field trucks and log trucks, for construction trucks, like KRAZ, Volvo VHD and FMX, and some other you cant feel its twisting, but off road frames are so heavy!