Tranny problem anybody have any ideas Update -1
#820743
10/03/10 12:44 PM
10/03/10 12:44 PM
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Joined: Jun 2009
Posts: 659 Boise Idaho
Boise Chall
OP
mopar
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OP
mopar
Joined: Jun 2009
Posts: 659
Boise Idaho
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I went for a cruise in my 72 Challenger last night and had some 727 tranny trouble. When I left home it felt like it wanted to stay in 2nd but eventually shifted and did fine. After cruising for for about 30 minutes it started feeling like it was slipping or more like going into neutral. I headed out from the cruise and on the way home it started getting worse it started going into neutral as I was driving when I let off the throttle it would engage again. It finally went into neutral and would not engage at all. I stopped in a parking lot figuring I would need towed home. After about 10 minutes I started the car again and the tranny worked fine for about 3 miles then it did it again. I let it sit for about 10 minutes and it worked again. When I got home it wouldn't make it up the slight incline my driveway has. I let it sit for about 10 minutes added some Mercon 5 fluid in it fired it up and was able to back it up and pull it up the driveway to put the car away. I couldn't see any signs of a leak at all. This tranny has about 1,000 street miles on it since a complete rebuild using billet everything and an ACC Boss HOG 3,500 rpm stall converter. Does anybody have any ideas of what could be wrong before I take it back to the guy that built it and get smoke blown up my *ss ?
Last edited by Boise Chall; 11/19/10 10:31 AM.
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Re: Tranny problem anybody have any ideas
[Re: Boise Chall]
#820747
10/03/10 01:17 PM
10/03/10 01:17 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I'd drop the pan & good visual/check the 2 band adjustments & as Stump said change the filter & see if that solves it.
live every 24 hour block of time like it's your last day on earth
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Re: Tranny problem anybody have any ideas
[Re: Boise Chall]
#820751
10/03/10 04:17 PM
10/03/10 04:17 PM
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Joined: Jan 2003
Posts: 25,945 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,945
Rio Linda, CA
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If a fluid/filter doesn't fix it the problem is leakage at the front clutch, as the fluid gets warmer and thinner the leakage results in the clutch releasing and no third tgear.
The INTERNET, the MISinformation superhighway
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Re: Tranny problem anybody have any ideas
[Re: Boise Chall]
#820762
10/05/10 12:52 AM
10/05/10 12:52 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Way too many unknown to pinpoint the cause of the failure. I guess the first obvious question is if using a valve body that requires the throttle linkage, are you using the throttle linkage and is it adjusted correctly? Also, are you using a larger trans cooler, and are the lines clean and flowing good? Sorry I have to ask you since it sounds like the trans builder did not do the install. If all that checks out, then you might want to question the trans builder? If he is cool, maybe he will let you watch him take it apart and and inspect the trans. That way you will know what went out, and maybe find out why? I have seen a few "mechanics" that though they were transmission rebuilders, but I watched them just replace the frictions and steels, but not even disasemble the clutch pistons to replace the seals which were likely the cause of the failure in the first place I don't know about the converter? I guess if it was pretty inefficent it could have generated alot of heat?
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