4L60-e? Transmission problem

Hey everyone my cousin has a 99 Suburban 1500 4x4. He was having problems with the transmission where (as described to me) it was having trouble shifting into 4th gear so he is unable to reach higher speeds. Basically to sum it up 3/4 people said it was electronic and one said they would have to take the trans apart and reassemble to see if the trans is the problem. After having a price quoted of 500 just to disassemble and find the problem and around 1200 to rebuild and reinstall the trans my cousin decided to just replace it.

My first question is the 4L60-e the trans in the 1500?
Second are their other transmissions that will fit his truck?
Third how do you identify a 4x4 trans?

Hey everyone my cousin has a 99 Suburban 1500 4x4. He was having problems with the transmission where (as described to me) it was having trouble shifting into 4th gear so he is unable to reach higher speeds. Basically to sum it up 3/4 people said it was electronic and one said they would have to take the trans apart and reassemble to see if the trans is the problem. After having a price quoted of 500 just to disassemble and find the problem and around 1200 to rebuild and reinstall the trans my cousin decided to just replace it.

My first question is the 4L60-e the trans in the 1500?
Second are their other transmissions that will fit his truck?
Third how do you identify a 4x4 trans?

You should get it on a transmission capable scanner and get codes and find the problem before throwing transmissions at it.

Post back any code or slippage data.

The transmission can be ID by the shape of the pan.

A 4W transmission will have no tail shaft housing and have a transfer case mounted on rear.

Check junk yard inter change book for what will work in it.