Re: ultramatic tranny cooler flow

Posted by HH56 On 2014/3/8 22:19:13

I'll second the outstanding looking engine and car.

I don't have a number offhand for the flow but it is enough to empty the unit over a few minutes if it gets loose. Maybe Ross has measured it and will have an actual number.

The fluid goes to the cooler immediately after exiting the converter so a restriction in that path would be a place to start. The path in and out of the converter occurs in the space between the pump shaft and reactor shaft for one direction and between the reactor shaft and input shaft for the other.

Sealing and flow control between the shafts and into the converter is done by the bushings and/or rings. Assuming there is no blockage or problem in the line or cooler restricting the output, if you changed the bushings during the rebuild, one of the bushings being slightly out of position would be a possible reason for a reduced flow.

Some bushings have holes or a groove which has to line up with a groove or hole in the front pump or a hole or groove on a shaft. Other bushings are positioned with a space between them so a hole or groove in the pump casting or shaft opens into the empty space. If any of the openings is partially blocked by a misplaced bushing, the flow would be compromised. An improper alignment between the pump or bellhousing and case is a remote possibility.

If the bushings are OK, one other possibility is the valve body has a sticking valve. Too much torque on the retaining bolts causing a bind was a frequent cause of sticking valves.