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4L60 problem

908 Views 3 Replies 3 Participants Last post by  Yelsorc
Alright tranny genious's, I am having a problem with the tranny in my 93 4x4 chevy truck. Its a 4l60 tranny. It works fine in 1-2-3-R, my problem is OD. I can drive in OD but if I try to accelerate past someone or go up a hill or something the tranny begins slipping. It gets a little RPM going then engages again and goes until I need to accelerate again.

I did change the filter and found nothing significant in the fluid or filter. The fluid isn't quite the bright red it should be, but not real bad either. Before I changed the filter and after, if I pull the dipstick the fluid looks foamy.

Does this sound like a pump problem or something else? Also is a 4l60 user friendly, meaning is it something a tranny beginner could handle. I have never tore into a tranny before, so if its out of my league I will just send it in, but would prefer to save some money and do it myself.

Any advice?

Thanks, Jeff
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Your 1993 4x4 truck should have a 4L60E unit. Have you checked?

I'd find a different tranny guy. If the radiator trans cooler is clogging up , it will be from trash from the tranny.

You need to diagnose the problem. A weak 3-4 clutch pack will cause problems in OD and 3rd gear may work OK.

You could have a weak shift solenoid.

Low pressure can cause the problem from a weak spring , worn boost valve , a weak force motor that controls pressure.

The band can be nearly burned up and it will hold power in 2nd gear and NOT hold power in OD since the 2-4 servo is a multi stage unit
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