stbd frame flex dilema opinions wanted

---------------------------------------------Originally posted by 98dakota20i wonder if your going to have any issues with the front. where the front clip is..

---------------------------------------------doesn't seem to have any flex up there... I put the frame on jackstands and jumped up and down on the front section... didn't move

---------------------------------------------Originally posted by madmike427HEY BRO!  i'm no engineer  and i've had alot of trucks in the past , but inyour first picture is your motor mounted to the frame??? cuz it looks alittle crooked bro?  and  the angle of your notch looks too steep??  so if i was you i would double check that!! good luck bro !!!!!

---------------------------------------------ummmn the motor was not bolted in it was sitting on the front crossmember, and what do you mean by my notch being too steep? lol

id try runnin  some inner rails  all the sfbd stuff iv done i ran inner rails on too or did some triangle stuff ill try to find some pics 

---------------------------------------------Originally posted by railin93Edited: 9/6/2009 7:29:36 PM by railin93you're flex point is at the joint of the backhalf and the rails under the cab...if you are going to eliminate the flexing, you have to strengthen that area and spread the load over the biggest area possible...i drew up a small idea and just tried to incorporate your existing design and strengthen your frame at the same  time....---------------------------------------------damn bro you even drew matching gussets!! tight work!

okay I put some blocks under the frame at the front and back of the cab and had a friend push down on the bed... all I can say is wow, the problem the whole time was really under the cab the 2x3 has mad flex! I'm going to run a length of 2x2 front to back on both sides to try and fix the problemanyone have any pics of 2" tall sfbd frames where they have done this?

flex under the cab is why  i was sayin u need inner rails... heres a pic of my buddies yota we did he wanted just wanted to sfbd he didnt want a whole new frame so we only redid the mid section...  not finished in the pic but gives an idea frame is super stiff dosent twist or flex side to side <img src="http://www.streetsource.com/uploads/Ownerprofiles/LowToy91/621200975722PM35991.jpg">

there it is haha havnt used these forums in a few years   

Edited: 9/7/2009 11:08:30 PM by jucieddime00

the flex under the cab is because you sat the 2x3 down instead of standing it up just think a 2x4 piece of wood laying down is alot easier to bend than a piece standing up...

yeah I know I just didn't think soo many people would build frames with 2x3 laying down or even 2x2 if the flex was that bad I guess I learned my lesson! oh well at least it will get some new paint

bars and gussets everywhere i have a friend that has them everywhere (low99maz)no flex. and i feel bad for the person that (god forbid) rearends him.i personally think your flex is coming from up front where your frame is welded betwwen the tranny crossmembers there no support on that weld and where it comes down to meet you need to plate the hell outta that before id even worry about the rearend