Hi,
Having a problem with front pump oil seal leaking. Have replaced a few times and having the same problem each time, seal will leak periodically at temp but not always. Any ideas what could be causing this problem????
hydramatic front oil leak
Re: hydramatic front oil leak
FYI Quote found on net
TRANSMISSIONS
We talked to Steve Peluso, a well-known expert on GM transmissions, who told us about several problems with the Roto Hydra-Matic automatic transmissions (which later on got the nickname "Slim Jim") used by Oldsmobile from 1961-'64. Up until 1963, they contained a less-than-durable aluminum governor, which was replaced by one made of steel in 1964. Also, because no torque converter was used, a damper plate was installed--it looks like a clutch disc with no lining--which had a tendency to crack. If it didn't, the retaining springs would get tired over a period of time, allowing the plate to work loose and eventually leading to a front seal leak. Back in the Seventies, a replacement damper plate cost less than $20; today, it'll cost you $200.
Yet even these two demerits do not top the list of potential transmission problems. According to Steve, "The weakest link was the aluminum torus coupling that housed the neutral clutch; it would often fail. But that wasn't always the case. In all actuality, the Oldsmobile version versus Pontiac's seems to be more durable, at a repair rate of two to one; we've heard of several cases where the unit has lasted intact since the day it left the factory."
TRANSMISSIONS
We talked to Steve Peluso, a well-known expert on GM transmissions, who told us about several problems with the Roto Hydra-Matic automatic transmissions (which later on got the nickname "Slim Jim") used by Oldsmobile from 1961-'64. Up until 1963, they contained a less-than-durable aluminum governor, which was replaced by one made of steel in 1964. Also, because no torque converter was used, a damper plate was installed--it looks like a clutch disc with no lining--which had a tendency to crack. If it didn't, the retaining springs would get tired over a period of time, allowing the plate to work loose and eventually leading to a front seal leak. Back in the Seventies, a replacement damper plate cost less than $20; today, it'll cost you $200.
Yet even these two demerits do not top the list of potential transmission problems. According to Steve, "The weakest link was the aluminum torus coupling that housed the neutral clutch; it would often fail. But that wasn't always the case. In all actuality, the Oldsmobile version versus Pontiac's seems to be more durable, at a repair rate of two to one; we've heard of several cases where the unit has lasted intact since the day it left the factory."