401 with 727 transmission
Printed From: TheAMCForum.com
Category: The Garage
Forum Name: AMC V8 Engine Repair and Modifications
Forum Description: AMC-made V8 engine mechanical, ignition and fuel from basic repair to high-perf modifications
URL: https://theamcforum.com/forum/forum_posts.asp?TID=93065
Printed Date: Apr/18/2024 at 7:52pm
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Topic: 401 with 727 transmission
Posted By: myrambler
Subject: 401 with 727 transmission
Date Posted: Mar/13/2018 at 9:25pm
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I just purchased a 1974 401 with a 727 transmission attached. These came out of a 1974 IH 2 wheel drive truck sitting in a barn since 1981. Farm truck with 33,000 actual miles on it. The engine is stuck so I'm soaking it in marvel mystery oil to try to free it up. Trying to decide what to do with the transmission, with that low of miles on it I'm thinking of just changing the filter and fluids. I don't have a vehicle to put these in at this point, however the 68 Ambassador 343 engine and m11 transmission are being rebuilt and are out of it so other than needing a driveshaft I could test them out in it. what I'm wondering is if I can free up the engine should I start it and run it as is and test the transmission at the same time. It has a two barrel motor craft carb so id pull the intake and install an aluminum intake and four barrel carb so I could check lifters and cam at that point. Ill try to get a bore scope to look into the cylinders to check for rust and see valves.
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Replies:
Posted By: Babycakes
Date Posted: Mar/14/2018 at 12:26am
| Take it apart! |
Posted By: bbgjc
Date Posted: Mar/14/2018 at 5:30am
| I would never try run either of those components without a tear down and inspection. Unless stored in an absolute vacuum moisture will have gotten inside and that's never good. |
Posted By: 6PakBee
Date Posted: Mar/14/2018 at 6:49am
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I've run 727's that have set for 20 years successfully but nearly 40...... Wow. I would at least drop the pan and do a visual on the internals and look carefully at the drained fluid for color and odor.
------------- Roger Gazur 1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
Posted By: dbomb
Date Posted: Mar/14/2018 at 11:44am
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If you wish to pull pan only to change filter and gasket try not to flip it upside down because all the sediment will end up on all the parts I've used 20 or 30 year old transmissions before but with a 727 it's so easy to work on it's best to take down and change all the piston bands and lip seals while ya can and don't forget the lockdown shaft seals and gear selector seals ------------- rebuiling 73 amx need parts |
Posted By: dbomb
Date Posted: Mar/14/2018 at 11:49am
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Rebuild kits are freaky cheep like 120 buxx gets ya all consumables inside. Behind a 401 might be best idea ------------- rebuiling 73 amx need parts |
Posted By: Red20
Date Posted: Mar/14/2018 at 8:12pm
Hey! I was born in 1981, and I am most certainly NOT “nearly 40”! I’m nearly 37, thank you... ------------- 1969 Javelin SST "Screamin' Banana" - Totaled Feb 2018 1973 Hornet Sportabout X "yellajack" - 360/727/TracLoc DAILY DRIVER |
6PakBee wrote: