Driveshaft question on a drop

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Lit549

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Whats everyone's experience with a 4" drop in the rear on a 05 tahoe?I installed belltech 4" springs,I was working on the truck (rear main),went to take out the driveshaft and man,it has very little room to remove,which tells me my yoke at the trans is probably bottoming out in the trans when I hit bumps?I really didn't think I'd have to shorten the shaft on a 4 in drop??
 

iamdub

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I'm sure the factory designed the geometry so that the axle would bottom out on the bumpstop before the driveshaft butt-f***ed the tranny (see what I did there?) :p

Sure, there's very little slack left, less than what you found, but it still should not bottom out. The way the rear of these things are lowered (coils only) doesn't change the factory articulation of the suspension, so lowering it is basically like keeping the stock suspension in a "squashed" state at all times. Now, if you removed the bumpstop from the frame, the axle may be able to swing up further on harder compressions and then you may can do damage. Get some adjustable link bars or axle relocators. I'd go with the relocators if it were me. Besides allowing tons of adjustment for axle placement and pinion angle, the adjustable links are known to be noisy due to the type of bushings. If the pinion needs adjustment, maybe get relocators and just upper links?
 
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Lit549

Lit549

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I'm sure the factory designed the geometry so that the axle would bottom out on the bumpstop before the driveshaft butt-f***ed the tranny (see what I did there?) :p

Sure, there's very little slack left, less than what you found, but it still should not bottom out. The way the rear of these things are lowered (coils only) doesn't change the factory articulation of the suspension, so lowering it is basically like keeping the stock suspension in a "squashed" state at all times. Now, if you removed the bumpstop from the frame, the axle may be able to swing up further on harder compressions and then you may can do damage. Get some adjustable link bars or axle relocators. I'd go with the relocators if it were me. Besides allowing tons of adjustment for axle placement and pinion angle, the adjustable links are known to be noisy due to the type of bushings. If the pinion needs adjustment, maybe get relocators and just upper links?
Right on man,I was wondering if the axle articulation changed with a drop.The design of the suspensions on these tahoes is crazy but I guess I'm use to the older chevys.So the axle relocators, is that the trailing arms that mount forward of axle,to the frame??Thanks,I wanna get it right cause I don't want my hoe (f'ng itself,haha)
 

iamdub

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Right on man,I was wondering if the axle articulation changed with a drop.The design of the suspensions on these tahoes is crazy but I guess I'm use to the older chevys.So the axle relocators, is that the trailing arms that mount forward of axle,to the frame??Thanks,I wanna get it right cause I don't want my hoe (f'ng itself,haha)

Coils ride better and links keep everything in place better. Leaves have their place, but the coil-sprung rear on these things is a better fit, seeing they're people-haulers.

The relocators basically move the trailing arm attachment points on the axle forward, which moves the axle backward. This better centers the wheels in the fender wells and provides more range for the slip yoke. Same concept as shock extenders, but horizontal and for the trailing arms.
 
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Lit549

Lit549

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Coils ride better and links keep everything in place better. Leaves have their place, but the coil-sprung rear on these things is a better fit, seeing they're people-haulers.

The relocators basically move the trailing arm attachment points on the axle forward, which moves the axle backward. This better centers the wheels in the fender wells and provides more range for the slip yoke. Same concept as shock extenders, but horizontal and for the trailing arms.
awesome,i appreciate it..I know that every since i dropped this thing,i havent liked the way it drives now.I did uca/lca by djm,it has bump steer thats crazy now,EVERYTHING in the front end is new..Rear rides WAY soft also,guess ill get it right eventually!
 

BigDave

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I have an 03, that I lowered 3” in rear and also done free travel mod and used norcalss bumpstops. Will I have trouble with ds bottoming out?
 

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