Question about transmission problems

[85blazerk5]

It feels like my reverse is going out on me, some times I have to floor it to get it to move at all in reverse, but drive works fine. I have a automatic 350, it worked just fine until just recently, I changed the fluid and filter, and all of a sudden, it acts like this...any advice as to what is going on? Thanks in advance.

 

[k20]

im not sure if the 350 works like the 400, but I know my reverse started going out, the first time I had tranny problems, then 3rd gear started slipping. In a 400, reverse uses the 3rd gear clutch, and uses a reverse band, both those were shot. My reverse acted like what your describing for 2 or 3 days, then I had no reverse. Time for a rebuild. Also, mine did it just after a fluid change, I think the fluid was what was holding it together lol. This last time I had tranny probs, they were catastrophic, the only reusable parts are the case and the output shaft.

 

[85blazerk5]

Thanks alot, I figured it was time for a rebuild...any clue as to how much one would cost? I won't even attempt to do it myself. Thanks

 

[1979jimmy350]

just to let you know for future refrence if you have a tranny that has not had the fluid changed in a long time you should not change it. Changing the fluid can cause it to go bad some times when the tranny has not had the fluid changed often. I know this from experience i did it to my 4l60e

 

[k20]

If you pull and take it somewhere around here, it runs between 350 and 400 for a rebuild. Taking the whole vehicle, Im not sure, I always take just the tranny.