I’m new here. Howdy All. I am normally Glagulator @ dieselplace, yeah, 6.5td.
Mainly need to ask a question about 4L80 pump gear clearances.
I have been researching 4L80’s on a number of sites over the years and see that @clinebarger seems to be a goto on them, and anyone else who may help.
So here goes.
I have a pump that has the O.D. clearance of the large gear of .004” to the stator. The gears have about .0020” to .0025” to the top surface and are the same height. The problem is there seems to be a lot of slop in the inner gear. I measured .024” to .026” between an inner gear tooth and the “divider” while pressing the gear tight to the other side.
I have not been able to find any useful info on this.
I have 3 pumps all about 200k miles from running trucks and all are almost exactly the same. Is this normal?
I am building it stock with a few of the recommended fixes to be dependable, no hot rodding, no heavy towing.
Also on the same pump, large front bushing that the TC rides on appears to be galled on one side and worn through the grey coating to the bronze on the other third. The TC is OEM and the snout also looks well worn.
This tranny is a Mr. Goodwrench special and appears to have been on the 95 6.5td Burb for most of it’s life. I say special because the overdrive planet was missing 1 washer on 2 of the gears, they were never there. I’m rebuilding it because it was leaking fluid all over and then the fluid did not look good, not real bad but not clear, and the high mileage. Pan was amazingly clean, just a little of the usual black stuff and very minor glitter.
Any help would be greatly appreciated.
Mainly need to ask a question about 4L80 pump gear clearances.
I have been researching 4L80’s on a number of sites over the years and see that @clinebarger seems to be a goto on them, and anyone else who may help.
So here goes.
I have a pump that has the O.D. clearance of the large gear of .004” to the stator. The gears have about .0020” to .0025” to the top surface and are the same height. The problem is there seems to be a lot of slop in the inner gear. I measured .024” to .026” between an inner gear tooth and the “divider” while pressing the gear tight to the other side.
I have not been able to find any useful info on this.
I have 3 pumps all about 200k miles from running trucks and all are almost exactly the same. Is this normal?
I am building it stock with a few of the recommended fixes to be dependable, no hot rodding, no heavy towing.
Also on the same pump, large front bushing that the TC rides on appears to be galled on one side and worn through the grey coating to the bronze on the other third. The TC is OEM and the snout also looks well worn.
This tranny is a Mr. Goodwrench special and appears to have been on the 95 6.5td Burb for most of it’s life. I say special because the overdrive planet was missing 1 washer on 2 of the gears, they were never there. I’m rebuilding it because it was leaking fluid all over and then the fluid did not look good, not real bad but not clear, and the high mileage. Pan was amazingly clean, just a little of the usual black stuff and very minor glitter.
Any help would be greatly appreciated.