Pumpkin Angle - Pirate4x4.Com : 4x4 and Off-Road Forum

Baketown Scotty · 08-09-2004, 08:11 AM

I am in the process of installing a 700R4 transmission and NP 208 transfer case in a 1969 Blazer. It will have a six inch suspension lift also. I am trying to get the motor as level as possible. Should I rotate the rear axle up toward the transfer case or leave it level? If I need to rotate it, how do I do that? Same question for the front. I thought I read some where that the u-joint connection at each end should be within 2 degrees of each other.

xtrmjoe · 08-10-2004, 12:06 AM

if it has the slip yoke with only a ujoint at each end then the drive line angles need to be the same. 4 degree difference at the slip and 4degree difference at the pinion, for example. if you have a cv joint at the slip then the drive line should be straight with the pinion, 0 degree difference. use axle shims to adjust as necessary. get the angles as close as possibile when the rig is sitting flat on an even surface.

Baketown Scotty · 08-10-2004, 01:49 PM

So if there are u-joints at each end the angle between the driveshaft and either the transfer case or differential needs to be the same at each end. Is there a maximum angle to stay under? I think I may have to go with a cv joint off the transfer case forward just to clear the cross-member. The cross-member had to be relocated to line up with the support bolts. This brings up another question. Mid-eighties parts blow-ups show a rod from the side of the transfer case up to the bellhousing with no bracket to the side rail of the frame for support. When I got it, it had a NP205 with this bracket to the side. Do I need this side bracket or is the rod to the bell housing enough?

Baketown Scotty · 08-10-2004, 01:51 PM

The axle shims you mentioned, are they beveled? Do they go under the springs on top of the spring perch? Do they need to be welded in place?

08-09-2004, 08:11 AM	#1 (permalink)
Baketown Scotty Registered User Join Date: Aug 2004 Member # 34047 Posts: 4	Pumpkin Angle I am in the process of installing a 700R4 transmission and NP 208 transfer case in a 1969 Blazer. It will have a six inch suspension lift also. I am trying to get the motor as level as possible. Should I rotate the rear axle up toward the transfer case or leave it level? If I need to rotate it, how do I do that? Same question for the front. I thought I read some where that the u-joint connection at each end should be within 2 degrees of each other.

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08-10-2004, 12:06 AM	#2 (permalink)
xtrmjoe Registered User Join Date: Jul 2004 Member # 33838 Location: Boonville CA Posts: 123	if it has the slip yoke with only a ujoint at each end then the drive line angles need to be the same. 4 degree difference at the slip and 4degree difference at the pinion, for example. if you have a cv joint at the slip then the drive line should be straight with the pinion, 0 degree difference. use axle shims to adjust as necessary. get the angles as close as possibile when the rig is sitting flat on an even surface.

08-10-2004, 01:49 PM	#3 (permalink)
Baketown Scotty Registered User Join Date: Aug 2004 Member # 34047 Posts: 4	So if there are u-joints at each end the angle between the driveshaft and either the transfer case or differential needs to be the same at each end. Is there a maximum angle to stay under? I think I may have to go with a cv joint off the transfer case forward just to clear the cross-member. The cross-member had to be relocated to line up with the support bolts. This brings up another question. Mid-eighties parts blow-ups show a rod from the side of the transfer case up to the bellhousing with no bracket to the side rail of the frame for support. When I got it, it had a NP205 with this bracket to the side. Do I need this side bracket or is the rod to the bell housing enough?

08-10-2004, 01:51 PM	#4 (permalink)
Baketown Scotty Registered User Join Date: Aug 2004 Member # 34047 Posts: 4	The axle shims you mentioned, are they beveled? Do they go under the springs on top of the spring perch? Do they need to be welded in place?