A friend is doing a frame up on a 1972 Chevy pickup. The truck originally had a 350 and a TH350 tranny in it.
He now has a 1988 350 and 700R4 tranny in the frame. He had to drill new holes in the frame to re locate the cross member to support the longer transmission.
He has also lowered the truck with a 2 1/2" front, 4" rear drop.
He is going to have the truck's original drive line shortened. He want's to know how much. I don't know if he still has the old engine and tranny. I think he only has the original drive line.
What info does the shop that shortens the driveline need? Are there some measurement that he can take and give to the shop.
....Like from the machined face of the transmission's tail shaft to the rear end's yoke? If so, what part of the yoke?
Option B.
If the 1988 350's engine mounting location is identical to his old 350 engine (I assume that they are) ... then maybe all that he needs to figure out is the difference in the transmission lengths between the TH350 and the 700R4 and have the shop cut off that amount.
I assume the two different transmissions could have different diameter output shafts and splines? If so, he would be using the yoke from the 700R4. I am not sure if that yoke and the one from the original TH350 would make a difference in the amount he needs to have driveline shortened.
how might that come into play?
Any info would be greatly appreciated.
He now has a 1988 350 and 700R4 tranny in the frame. He had to drill new holes in the frame to re locate the cross member to support the longer transmission.
He has also lowered the truck with a 2 1/2" front, 4" rear drop.
He is going to have the truck's original drive line shortened. He want's to know how much. I don't know if he still has the old engine and tranny. I think he only has the original drive line.
What info does the shop that shortens the driveline need? Are there some measurement that he can take and give to the shop.
....Like from the machined face of the transmission's tail shaft to the rear end's yoke? If so, what part of the yoke?
Option B.
If the 1988 350's engine mounting location is identical to his old 350 engine (I assume that they are) ... then maybe all that he needs to figure out is the difference in the transmission lengths between the TH350 and the 700R4 and have the shop cut off that amount.
I assume the two different transmissions could have different diameter output shafts and splines? If so, he would be using the yoke from the 700R4. I am not sure if that yoke and the one from the original TH350 would make a difference in the amount he needs to have driveline shortened.
how might that come into play?
Any info would be greatly appreciated.
