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Returning to service after 10 year storage.
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gil travis
New User
Jul 28, 2015, 8:39 AM
Post #1 of 6
(3386 views)
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Returning to service after 10 year storage.
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1976 Jeep CJ7 with AMC 305 V8, auto transmission. Vehicle rolls when in Park. When under power and in gear, at idle speed, vehicle will not move forward or back. When attempting to shift back into Park, grinding occurs and prevents engagement. Than you in advance for your valued knowledge. Prior to storage none of these issues were present!
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 28, 2015, 9:13 AM
Post #2 of 6
(3379 views)
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Re: Returning to service after 10 year storage.
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Do you know what was done if anything to store this? Towed to some place maybe or anything more?
Oh boy - lots and lots possible. Not moving in Park suggests either it wasn't even left in park and it stuck or driveshaft might have been removed to towing it to where it is? That would if fluid didn't just pour out leave engine turning trans some and would buzz trying to get park and with no driveshaft wouldn't hold. Just a thought on just that. There will be lots to do other than this,
T
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gil travis
New User
Jul 28, 2015, 11:23 AM
Post #3 of 6
(3370 views)
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Re: Returning to service after 10 year storage.
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Thank you for your interest Tom. I parked the Jeep because the windshield frame was rusted and the fuel filler hose leaked. I had building space for storage and it remained there far more time than intended. Priorities change when more important issues must be faced. Ten weeks turned into ten years and no prep. for storage was made.
I have recently completed repairs and all is fine with the exception of the THM 400 problem. The trans. fluid is pink and translucent as if new. The shift linkage is operating properly and not over or under shooting the shift lever positions coming out of the transmission.
I assume that activating the Park position is purely a mechanical action and attempted to creep forward, in gear, and engage Park while moving with the intention of overcoming minor alignment problems. The car would not move in any gear forward or back.
I recently purchased vacuum tubing to replace existing, could possibly going to the transmission, leaving to install and hope that it is the cure.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 28, 2015, 1:22 PM
Post #4 of 6
(3362 views)
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Re: Returning to service after 10 year storage.
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10 years is enough to forget if anything was done to the rear driveshaft which by your explanation is just how a trans would behave if it wasn't splined to driveshaft and hooked up to yoke at rear differential. It runs, and there still fluid motion to turn trans inside a bit. You'd see that if you hoisted rear wheels when in just 2WD on many/most but without turning anything if so for now whatever reason it would grind going BACK to park as that's a mechanical PAWL (sp?) - imagine a spring pushed pointed lever into a multi toothed saw blade action while it was moving vs still is the idea however those look.
If you are sure this all behave trans wise when parked it may have lost enough fluid or maybe front pump just isn't pumping near enough to make pressure to engage.
Will it run long enough to check the fluid level for you? Even if cold it should read in Park for THM400 if dipstick is right shows by the pint and would not engage if (guess) 2-3 qts. low maybe earlier than that?
Try to verify fluid level. Another just because test is hoist rear wheels while in Park and turn either wheels or driveshaft itself and see that it does really lock I would think? Wheels would turn opposite direction and not the shaft or might both turn same way and shaft would turn and shouldn't!
Oh my - if shaft turns with this in park it's physically broken somewhere -- all this with engine OFF for a test. Undo front wheels either hubs or shifted however this one disengages.
Other and bear with me I'm not a trans specialty tech just enough clue to know real trouble from chances of some things. If this can be in "N" all the time with 4WD selector that must be known engaged in something - 4 Lo or 4Hi. I really don't know if that is shifted by vacuum, mechanical, hydraulic or what especially AMC! If you didn't cobble in that V8 engine they sure did as an option and squeezed in that GM trans. Wild overkill as you know for the thing, engine and trans.
Try some things as mentioned. We have a trans specialist with us and can go looking for him to come here or send whole thread to transmission issues he does pay a lot of attention to.
Just know even regulars here can't be here all the time but really think we can figure out why on this problem,
T
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 28, 2015, 3:21 PM
Post #6 of 6
(3357 views)
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Re: Returning to service after 10 year storage.
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GREAT! Now on to whatever else it will need for sitting so long.
I'll close this thread out as solved to keep spammer out. Ask any moderator if you want to re-open this one or start a new one for other issues.
Glad this was just that simple,
Tom
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