Header/Front Drive Shaft Issue

[Chipper2oo3]

Bought a set of summit full length headers and my front drive shaft is hitting my right side when I lock into 4wd or lock my hubs in. I pulled out my drive shaft and the joints feel fine and the slip yoke only has a small amount of slack. Anyone ran into this? Have the driveshaft fixed or take the headers back off? The grease fitting has already tore a hole in one of the tubes... Summit verified they were 2wd/4wd compatible.

 

[Swims350]

never seen it before we had dynomaz headers from a 76 2wd 3 spd on the column and put them on an 86 k10 with an auto and had no issues.

 

[bucket]

Your engine mounts may be in bad shape.

 

[crazy4offroad]

Yep you will have front driveshaft issues with long tube headers. It gets a little better with lift but there is still contact upon up travel of the passenger side.

 

[bucket]

The only clearance issue I've ever had was with the shackles, d-shaft was always fine. Never run those Summitt headers though.

 

[Swims350]

the summit headers are flowtechs we have the same set on dad's 84 and his 86 was stock with them dynomax ones then lifted and never an issue.

 

[bucket]

Hmm, I didn't know that. I had Flowtechs on the '77 Blazer that's stock height and they cleared everything just fine.

 

[Swims350]

yea our box even had the flowtech part number on it.

 

[hootsmcgoots]

I have the flowtechs on an 86 4x4 4sp and haven't had any such issue..... x2 on motor mounts, or check end play on pinion and t/c yokes.