97 silverado shifting problem

[snowman4290]

97' 1/2 ton silverado with 160K on it. Works fine when cold. When warm, trany down shifts, speedo goes to 0 and abs light comes on. Manual shifting into 1, 2 or 3 kind of works. Anybody got an idea?

[MT-2500]

You need to fix the speedometer problem.
A good scanner may pick up a code and point to the problem.
Post back codes.
MT

[Jeremy-WI]

Does the tach and prndl display still work when the speedo quits?