57j2olds Posted August 10, 2022 Share Posted August 10, 2022 Hello, I was told not to worry about the condition of this Hydramatic pilot bearing as the inner surface is still smooth. However piece of mind tells me to replace. Anyone have any leads where I can find one? Fatsco doesn't have any. Thanks Link to comment Share on other sites More sharing options...
DonMicheletti Posted August 10, 2022 Share Posted August 10, 2022 I believe the pilot bearing isnt necessary with a Hydromatic Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted August 10, 2022 Share Posted August 10, 2022 10 minutes ago, DonMicheletti said: I believe the pilot bearing isnt necessary with a Hydromatic a pilot shaft bearing IS required, for all Hydra-Matic transmissions prior to the Controlled Coupling Hydra-Matic (jetaway) coming out in 1956, there is no O in Hydra-Matic. 1 Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted August 10, 2022 Share Posted August 10, 2022 3 hours ago, 57j2olds said: Hello, I was told not to worry about the condition of this Hydramatic pilot bearing as the inner surface is still smooth. However piece of mind tells me to replace. Anyone have any leads where I can find one? Fatsco doesn't have any. Thanks your pilot shaft bearing is part number 907109, does look like someone did a mess of trying to stake the bearing in the crankshaft. Link to comment Share on other sites More sharing options...
DonMicheletti Posted August 10, 2022 Share Posted August 10, 2022 No year was stated and with the handle "57J2Olds" (which I had), I assumed, incorrectly, they were referring to a '57 1 Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted August 10, 2022 Share Posted August 10, 2022 3 minutes ago, DonMicheletti said: No year was stated and with the handle "57J2Olds" (which I had), I assumed, incorrectly, they were referring to a '57 the title of the subject says 1948 Olds pilot bearing needed Link to comment Share on other sites More sharing options...
DonMicheletti Posted August 10, 2022 Share Posted August 10, 2022 Good point Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted August 10, 2022 Share Posted August 10, 2022 3 hours ago, 57j2olds said: Hello, I was told not to worry about the condition of this Hydramatic pilot bearing as the inner surface is still smooth. However piece of mind tells me to replace. Anyone have any leads where I can find one? Fatsco doesn't have any. Thanks there's a nos 907109 pilot shaft bearing listed on feebay, original GM New Departure box. Link to comment Share on other sites More sharing options...
Andy J Posted August 10, 2022 Share Posted August 10, 2022 I got mine from NAPA.I think it was $38-$40. 1 Link to comment Share on other sites More sharing options...
57j2olds Posted August 10, 2022 Author Share Posted August 10, 2022 (edited) I cant find it...??? Link? This says CLUTCH pilot bushing....I dont have a clutch. Thanks Edited August 10, 2022 by 57j2olds (see edit history) Link to comment Share on other sites More sharing options...
F&J Posted August 10, 2022 Share Posted August 10, 2022 37 minutes ago, 57j2olds said: This says CLUTCH pilot bushing I tried to look up your 1948 "inline" engine bushing in my 57 Olds factory parts book. These books normally go back quite a few years, but when I found the group number, it only showed the bushing for 56 and 57 for some reason... bear with me.. The reason i tried to look, is that all "V8" overhead Olds from 49-64 used the same bushing for the old style Hydramatics as well as ALL standard transmission cars. On top of that, the same exact bushing was used in Chevys for standard shift from 55-up to at least 70s. (then it would be commonly available) If I had been able to find the 48 bushing in my book, and if it showed to be same as 49-up V8, then i'd tell you to get one from local parts place for a Chevy, in case they say that they had no listing for such an old car like 48 Olds. Link to comment Share on other sites More sharing options...
TerryB Posted August 10, 2022 Share Posted August 10, 2022 49 minutes ago, 57j2olds said: I cant find it...??? Link? This says CLUTCH pilot bushing....I dont have a clutch. Thanks That’s because most automatic trans cars don’t use one, but yours is the exception. Link to comment Share on other sites More sharing options...
57j2olds Posted August 10, 2022 Author Share Posted August 10, 2022 35 minutes ago, F&J said: I tried to look up your 1948 "inline" engine bushing in my 57 Olds factory parts book. These books normally go back quite a few years, but when I found the group number, it only showed the bushing for 56 and 57 for some reason... bear with me.. The reason i tried to look, is that all "V8" overhead Olds from 49-64 used the same bushing for the old style Hydramatics as well as ALL standard transmission cars. On top of that, the same exact bushing was used in Chevys for standard shift from 55-up to at least 70s. (then it would be commonly available) If I had been able to find the 48 bushing in my book, and if it showed to be same as 49-up V8, then i'd tell you to get one from local parts place for a Chevy, in case they say that they had no listing for such an old car like 48 Olds. Appreciate your help! I have a straight 6 as well. Lee Link to comment Share on other sites More sharing options...
NailheadBob Posted August 10, 2022 Share Posted August 10, 2022 (edited) This might be what you need? I found in group # 0.649 in a 1955 Chassis parts book bushing # 412562 https://www.ebay.com/itm/143293063712 Bob Edited August 10, 2022 by NailheadBob (see edit history) Link to comment Share on other sites More sharing options...
Frank DuVal Posted August 11, 2022 Share Posted August 11, 2022 Remove the bushing that's in there, measure ID, OD and length. Compare to https://www.dormanproducts.com/gsearch.aspx?type=keyword&origin=keyword&q=Clutch+Pilot+Bushing Or other documentation you can find. Have round stock that fits the hole? Pack the hole with paper mache (or grease, but use eye protection!) and drive round stock in. Another trick is a square (not hex) nut that will just go through the hole, drop in and then screw a bolt into the nut and walk the bushing out. I typically use a tap to remove them, BUT you want this one out WITHOUT damage! 1 Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted August 11, 2022 Share Posted August 11, 2022 19 hours ago, 57j2olds said: I cant find it...??? Link? This says CLUTCH pilot bushing....I dont have a clutch. Thanks go on feebay, and in search window type in 907109 Link to comment Share on other sites More sharing options...
57j2olds Posted August 11, 2022 Author Share Posted August 11, 2022 Thank you. I will use my calipers tonight to check size. Link to comment Share on other sites More sharing options...
JACK M Posted August 11, 2022 Share Posted August 11, 2022 I had heard about taking these out hydraulically (filling the cavity with grease and driving in the correct sized rod stock) Took me awhile until I needed to try it. I was amazed how well it worked. 1 Link to comment Share on other sites More sharing options...
Frank DuVal Posted August 11, 2022 Share Posted August 11, 2022 A friend of a friend lost an eye from the grease shooting out while doing this. That’s his story and he stuck to it. So I say wear protective eyewear. I was surprised how well the paper mache worked. For the Chevrolet/GM/Corvair ID bushing I drive an old input shaft into the bearing to apply the pressure. Sure beats cutting them out with a cold chisel or a hacksaw blade (without handle). Link to comment Share on other sites More sharing options...
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