My mother in law has a 2005 Trailblazer LS 4x4. Last year sometime the transmission went out. She was loosing fluid due to a leak in the system prior to the loss of all movement. This year I finally got around to pulling it and rebuilding. This is my 5th or so rebuild on a 4l60E so I know just enough to be dangerous and screw things up so...
The pump was shot but I found nothing other than normal wear on the other hard parts. I cleaned it all up put in new seals, pistons, steels + frictions, bushings, band. I opted to replace the pump because I didn't think the old one could be reused due to some light gouging on the body. I used a video for instruction, clearances, etc but purchased parts on ebay.
On the valve body i cleaned thoroughly w mineral spirits, checked that all the springs were working, replaced the gaskets, reused the plate... I reused all solenoids, tcc, presure regulator... and did not ream or replace the boost valve etc as it was a cost sensitive rebuild and I thought we had identified the fault as low fluid volume, high pump pressure to pump failure.
I put 1 qt of transmission fluid in the torque converter that I reused from the truck. We installed the transmission after lining it up. Everything appeared to go into place right, all the mounts cables, fluid lines etc all lined up leading me to believe it is in the correct position. I 8x times checked that the converter was seated into the pump fully before Installed the flexplate to torque converter bolts. Everything else was connnected and checked. 5 quarts went into the pan and then we started it and ran the engine for 10 min before checking the fluid and adding another 5 quarts. Since I had no movement I put a gal more fluid in until it was leaking out of the fill tube area... I siphoned about 3 qt back out.
While still on jackstands the vehicle wheels will turn, increase speed by throttle input, and appears to work in each gear. I can move the wheels with the rear drive shaft and they all turn freely.
Once on the ground it will not move.
I dont have a stuck calliper because I just redid the brakes at the same time and the wheels all move without issue... except on the ground... lol.
So far I have pulled the cooler line at the radiator and verified the pump is pushing fluid, although I have no idea how much pressure it needs. I then
pulled the transmission down again and attempted to re-seat the torque converter it wont move any father back. Flexplate to converter clearance I can place a 7/16" drill bit. I also checked the parking break to ensure it wasn't engaged and since the truck will roll in neutral I don't think this is an issue.
The pump was advertised as being a 300 mm. Is it possible I have the wrong pump which would prevent the torque converter from staying seated?
Is it possible that there is an electrical brake component grounding to the frame which prevents the truck from moving?
I will pull down the pan and check that the manual valve linkage didn't come off later today. Any recommendations, advice, ideas or assistance is greatly appreciated thank you.
The pump was shot but I found nothing other than normal wear on the other hard parts. I cleaned it all up put in new seals, pistons, steels + frictions, bushings, band. I opted to replace the pump because I didn't think the old one could be reused due to some light gouging on the body. I used a video for instruction, clearances, etc but purchased parts on ebay.
On the valve body i cleaned thoroughly w mineral spirits, checked that all the springs were working, replaced the gaskets, reused the plate... I reused all solenoids, tcc, presure regulator... and did not ream or replace the boost valve etc as it was a cost sensitive rebuild and I thought we had identified the fault as low fluid volume, high pump pressure to pump failure.
I put 1 qt of transmission fluid in the torque converter that I reused from the truck. We installed the transmission after lining it up. Everything appeared to go into place right, all the mounts cables, fluid lines etc all lined up leading me to believe it is in the correct position. I 8x times checked that the converter was seated into the pump fully before Installed the flexplate to torque converter bolts. Everything else was connnected and checked. 5 quarts went into the pan and then we started it and ran the engine for 10 min before checking the fluid and adding another 5 quarts. Since I had no movement I put a gal more fluid in until it was leaking out of the fill tube area... I siphoned about 3 qt back out.
While still on jackstands the vehicle wheels will turn, increase speed by throttle input, and appears to work in each gear. I can move the wheels with the rear drive shaft and they all turn freely.
Once on the ground it will not move.
I dont have a stuck calliper because I just redid the brakes at the same time and the wheels all move without issue... except on the ground... lol.
So far I have pulled the cooler line at the radiator and verified the pump is pushing fluid, although I have no idea how much pressure it needs. I then
pulled the transmission down again and attempted to re-seat the torque converter it wont move any father back. Flexplate to converter clearance I can place a 7/16" drill bit. I also checked the parking break to ensure it wasn't engaged and since the truck will roll in neutral I don't think this is an issue.
The pump was advertised as being a 300 mm. Is it possible I have the wrong pump which would prevent the torque converter from staying seated?
Is it possible that there is an electrical brake component grounding to the frame which prevents the truck from moving?
I will pull down the pan and check that the manual valve linkage didn't come off later today. Any recommendations, advice, ideas or assistance is greatly appreciated thank you.