Possible Trans problem?

[OrangeCrushK10]

HA! I remembered my password!

Long time no see CK5.


So anyways, I thought I'd consult the best diagnostic group I know on this one.

I have a 1997 K1500 Yukon, 350 tbi, automatic. It starts, idles and revs fine out of gear. However, when driving it has no guts. In order to accelerate I have to just barely touch the gas, any real gas pedal use and it just sits there slowly losing speed, sometimes making a clanking noise or having a slight pulsing feeling.

I'm thinking the transmission since it has no problems out of gear with revving or starting. However slushboxes are one of the few parts on a vehicle I know very little about. My gut is telling me torque converter, but I've read it may also be the pump or even the clutch pack.

I believe the trans is a 4L60E, but I'm not positive.


What is your opinion ck5?

 

[75GmcJimmy4x4]

you may be right on the converter do you have any leaks ..... is there any gear that does it more in or just all of them ....

 

[OrangeCrushK10]

All the gears, except maybe 1st. It seems to get up to about 20mph just fine.

I've never noticed any stains/puddles left under it, but I checked the fluid yesterday and it was about 2qts low. I topped it off hoping that's all it was.

I'm not looking forward to swapping a torque converter in this. It's my DD too is the worst part.

 

[imiceman44]

All the gears, except maybe 1st. It seems to get up to about 20mph just fine.

I've never noticed any stains/puddles left under it, but I checked the fluid yesterday and it was about 2qts low. I topped it off hoping that's all it was.

I'm not looking forward to swapping a torque converter in this. It's my DD too is the worst part.

2 qts low I say was your problem.
How often do you check your fluids?
If this happened over years, then you might be OK for a while, if it happened in a few months you wanna find where it went.

 

[OrangeCrushK10]

2 qts low I say was your problem.
How often do you check your fluids?
If this happened over years, then you might be OK for a while, if it happened in a few months you wanna find where it went.

Unfortunately topping off the fluid didn't help any.