Can you find the vibration???

[Rack Man]

Your speedo cable is enetering in the same position as mine on the drivers side

[OrrieG]

In late but is that cross member really only held in with one bolt in the photo at post 6? Don't know if that would cause your problem (maybe the cluck) but definatley not good. Factory came with 4 bolts per side, two each on the top and bottom rails. There is a lot of weight on that single 3/8" bolt.

[powerdriver 1958]

Is there a chance that the front driveline is engaged with the hubs turned to unlock? that will make it vibrate.Ummm don't ask how I know that.

[2tons of fun]

Originally Posted by Gmelahn

haha, I think I'll change it. There is a slight noise when i let off the the throttle and then get back on it lightly, the trans guy said it normal play in the gears with big tires.

Any experience with that?

you are worried about a "slight" noise?

son, i have a manual 465, with a 203 and 205 doubler runing down to a 14bff with a detroit. when i accelerate all you hear is screaming bbc power, when i am up to speed all you hear is bogger whine, when i am slowing down all you hear is bearing and gear clash.

[Gmelahn]

Originally Posted by Oilbrnr

Has the pinion angle been ruled out yet?

No it hasn't. I need to take the truck to the driveline shop and have them look at it.

[Gmelahn]

Originally Posted by OrrieG

In late but is that cross member really only held in with one bolt in the photo at post 6? Don't know if that would cause your problem (maybe the cluck) but definatley not good. Factory came with 4 bolts per side, two each on the top and bottom rails. There is a lot of weight on that single 3/8" bolt.

It currently has two bolts per side. You say it needs four huh? Ill have to see how that works.

[shilo]

Originally Posted by 2tons of fun

you are worried about a "slight" noise?

son, i have a manual 465, with a 203 and 205 doubler runing down to a 14bff with a detroit. when i accelerate all you hear is screaming bbc power, when i am up to speed all you hear is bogger whine, when i am slowing down all you hear is bearing and gear clash.

ha ha I love it! Between my boggers, gear drive and open top on my jeep i cant hear a thing.

[OrrieG]

Originally Posted by Gmelahn

It currently has two bolts per side. You say it needs four huh? Ill have to see how that works.

No, two per side should work, I was thinking if there was only one the support might be rocking.

[Gmelahn]

So, I found out that the cab of my truck is a 2wd cab, the 2wd hump was cut out and retro fitted with a 4wd hump. Although this modification was done the transfer case was hitting the underside on the bed which led me to question the crossmember. After measuring the crossmember on my truck against a stock 4wd crossmember I found mine was an inch and a quarter short. I fabricated a spacer and fitted to the truck today, the vibration is significantly less noticeable. Almost not at all! I would say problem solved. There was also a broken motor motor mount, which was replaced today also.

Question though....

where can I find a 4x4 crossmember???

And thank you everyone for sharing your knowledge.

[2tons of fun]

what do you need one for, you fixed it.

[cobinder]

Originally Posted by 84 400

Don't quote me on this but I think the tail cone could be rotated?? My truck has a factory NP203 and does NOT have the tourqe arm. It looks like you definatly have a np205 tho because it has the lower drain plug which my np203 does not have.

Wish i could be more help

FYI
They make at least two different tail outputs that have the speedo in different positions. The one picured is about 9 o'clock (low) and the other one is about 2 o'clock (and high). And no you can't rotate them.