Hi Guys, got a question for you. I have a 1990 Chevy Suburban 1/2-ton 4x4, w/ a fuel-injected 350. There are 220,000 highway miles on the motor. I have been having some real issues with the 700R4 tranny, and need some feedback.

When we are on the road the motor won't kick down, and it doesn't matter what speed we are going at. It used to be that the motor would drop down at 40-45 on its own, but now it will only do it very, very occasionally, and then only when I let of the gas for a second. If I don't try to get it to kick down that way it will happily roar away at 50-60-70 MPH.

No other shifting issues that I am aware off, the tranny fluid level and color seems fine, and the tranny has never been rebuilt. BTW, while a slug traveling up hill is faster than this Suburban, it doesn't seem to use oil and doesn't smoke. If I can figure out an easy solution to the tranny problem I might be able to get another 50k out of this unrusted, undamaged vehicle. I consider this a hot rod topic because I use this overgrown station-wagon to fetch parts for my 71 Lincoln Coupe Lowrider !

Any suggestions from the wise ones here on the board? Thank you in advance for any help.

Michael