Vibration
Thread Starter
On The Tree
Joined: Aug 2012
Posts: 190
Likes: 0
Vibration Have an 82 silverado lq4/4l60e, kept stock driveshaft and trans crossmember (relocated rearward) using dirty dingo mounts in stock sbc location. I have a vibration that starts around 50mph, nothing severe just noticeable, it didn't exist before my swap. I have 20" boss 338's on it before/after swap and recently had them balanced with weights on the inside only. Truck didn't drive for about 6 months during the swap. I recently checked the pinion angle trans is 4* down diff is 2.5* up. I feel the vibration in the seat, not the steering wheel so I think it's related to something in the rear. Could that 1.5* difference cause my vibration or should I try swapping wheels front to back? I'm sure I researched it but a 700r4 and 4l60e have the same output spline count right?
Launching!
Joined: Dec 2011
Posts: 242
Likes: 4
From: Alabama
Mike, I would go ahead and move the trans up to the 2.5* to match your pinion . You should have plenty of room in your 82 to shim the tranny mount . They say you can get by with 1* diffrence but its best they are equal to cancel . I would do this regardless.
If it had been sitting for 6 months your tires may have flat spotted. 20" wheels with a low profile tire , not much side wall to move. It will take some heat in the tires to get them back.
Just some things to think about. Good luck
If it had been sitting for 6 months your tires may have flat spotted. 20" wheels with a low profile tire , not much side wall to move. It will take some heat in the tires to get them back.
Just some things to think about. Good luck
Mike, I would go ahead and move the trans up to the 2.5* to match your pinion . You should have plenty of room in your 82 to shim the tranny mount . They say you can get by with 1* diffrence but its best they are equal to cancel . I would do this regardless.
If it had been sitting for 6 months your tires may have flat spotted. 20" wheels with a low profile tire , not much side wall to move. It will take some heat in the tires to get them back.
Just some things to think about. Good luck
If it had been sitting for 6 months your tires may have flat spotted. 20" wheels with a low profile tire , not much side wall to move. It will take some heat in the tires to get them back.
Just some things to think about. Good luck
