[wheneaglesfly]

Originally Posted by U47

GM stopped making them that's what happens. Not everyone tossed either type of trans. I have a perfectly healthy 63 Catalina that has it's original Roto and it works very well. Most were not converted to stick shift. In the late 60's and early 70's most of the converted ones were converted to T-400. Now there has been quite a few going to 200R4 or 7004r.

They cant be drag racing or street racing them too hard with a 200R4 & 700R4.
The Torque of a 389, 400, 421, 428 , &455 will tear them up bad.
A hot small block Chevy in a Corvette tears them up unless the best parts are used.
Still cross your fingers.

Takes a 1987 Buick Grand National core GNX.

5-PINION NOS GM MADE IN OHIO 4L65E Front planet set & Rear reaction set.
I bought one of the last NOS Ohio 2005 run 4L65E 5-pinion planets.
In.my 1987 C4 700R4 Vette convertible now.
Made in Mexico and China current are exoding on dragstrips nationwide