Troubleshooting Vibe problems

[farmtruc]

Update:
I got my new shaft in the truck and it helped out 99%. It's a very nice piece and i highly recommend denny's driveshafts. I do have a small vibe between 70-75mph, i'm thinking something else got damage during all the breakage. Where do i start?
This crazy thing called critical speed is over i think, but just to make sure, I think i'm going to go with 3.42's and a 3200stall. Some say this is a tad too high of a gear, but man i loved the 3.42's on the highway, downshifting into 2nd on the highway and literally blowing away fbody's (close to stock ones that is). Of course my aerodynamics hender me a little after 100mph, but i left off around there anyway, then the race is over.
I'm still thinking about some 3.73's, this is very close to the 4.10's , so not sure on that.

I guess i'll start replacing parts until the vibe goes away:
things to do:
-recheck driveline angle
-replace gears
-check rearend internals for damage
-replace brass bushing in the tailhousing, again
-check internals of tranny (very last for sure, don't have too much time for this one)


later,

allen

[Sleeper]

good to know that was the main problem...those of us who havent thrown a shaft should be at %100


thanks for the info/update

Brandon

[CHEVYMAN]

Allen, go for the 3.73's. When I race pewter4.8(beto with the 4.8 excab) I take him everytime on the freeway. I know he has a 4.8 and i have a 5.3 but when we race on the freeway from 65 i start pulling and he hangs a little but when mine shifts to 3rd he is still in second and starts to catch me and almost even out with me but when his shifts to 3rd i leave him standing still because mine has been in the 3rd and is starting to pull hard after his shifts out of 2nd. Hope this helps!

[farmtruc]

I may consider the 3.73's then, plus i'd like to tear the rearend apart and check for bent parts, now that i think about it, i did have a vibe with the 3.42's,

maybe with the 3.42's i wouldn't have such a good take off anyway, after running my new time, i like the 4.10's again, hahahah, but i think 3.73's will be just as good.

thanks for the comment,

allen