about a month ago i changed the fluid and filter in the tranny on my 94 k1500, and added a b&m shift plus(or as i call it now **** plus). while im cruising between 45 and 60 mph, it for lack of a better way to describe it, slips. it shifts fine but while im driving the rpms change by just a very little amount fast and slow. it didn't do it before i changed the fluid. i do have 33s on it and 3.42 gears, but they've been on it for years. any thoughts?

 

i have that same kit and it was ok at first then i added a vett servo and it would bang the 1-2 shift at light throttle and 2-3 shift but if a was hard on the trottle it would do fine . so i just turned it to the off side. and stopped running it when around town i use stage one when towing and shifts nice when towing just not good when daily driving at light throttle .

 

its not so much the shifting im concerned with. its the constant change in rpms when im at part throttle from 45-60 mph.

 

3/4 might be going out. that rpm change is really noticalble when you have non sock exhaust. IF you just drive it in 3 does it do the same? Do you have a trans temp guage? It could be several other things as well.

If you had never changed your fluid until now all the "stuff/gunk" is now gone and theres is more free space between your steels and clutches. I would predict you have a tranny rebuild in your future. My last truck i had the 60e rebuilt a total of about 6 times. I am not a stranger to slipping trans.

Have you checked your fluid level?

The rpm changes is the clutches slipping. I bet that if you put it in cruise control it still will have the rpm changes. Eventually our steels will over heat, warp and your down.

 

could be many things even a torque converter clutch sliping of locking and unlocking

 

TCC solonoid as well, the valve body might be closed or even a stuck check ball in your trans like in my old 60e trans.
If you need to replace the solonoids buy oem only.

 

ill try to get video of it tomorrow. im planning swaping a newer one when i do the 6.0 swap anyways. i just need to get this one to last til then. fluid level is good, a little foamy. i think it was always like that though.

 

put in a bottle of the lucas stuff for slipping trans. its thick and might help keep it up and running for a while.

 

foamy ? could be over filld

 

So it doesn't do it in just 3rd. And every now and then when I park and get out I can smell tranny fluid. It doesn't leak, but I can noticeably smell it.