Hey guys,

Today I was driving on cruise and all of a sudden the truck revs up and I have nothing. I pulled over and went through all the gears and nothing happens, then tried reverse and still nothing. I Checked my fluid and its about 5" past the full mark.

My truck is a 03 silverado 2wd. From what I have read its my tranny oil pump, any other ideas??? cant see this being an easy fix.

Having said all of that, I just changed the tranny 3 weeks ago. I pulled the 4l60e and put in a 4l65e with 91,000 out of a caddy.

Thanks in advance!

 

Any ideas guys?

 

Does anyone know if the pumps are the same in the 4l60e and the 4l65e trannys?

 

Yes they are the same.

 

Did you change anything inside the trans when you put it in? Somehow you lost all pressure.

Best place to start is pulling the pan to see if anything looks weird...

 

No all I did was pulled the 4l60e out and put the 4l65e in.

aside from the pump going is there any other way I would lose all the oil pressure plus have my oil level really high?

 

I mean there are other ways to lose all pressure... i dropped a boost valve that wasnt seated properly and I had literally nothing. Can't speak to the fluid level though. I think that was actually OK.

 

Is there any fuses or solenoids that run the pump?

 

Think I've found the issue

Found this on 30 common problems with the 4l60e:

21. No movement in any gear: pump failure, or total loss of fluid. Remove transmission and rebuild, or refill pan and find the leak. If out of fluid, avoid running the engine until the transmission is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.

 

Pump is mechanical.