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Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 4 Weeks Ago   #1 (permalink)
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Default Rebuilt Transmission problems

So, today we (me and my dad) installed the freshly rebuilt engine and transmission into my car, and got it rolling down the road (fairly quickly i might add) at first everything was going well. But, after going to the parts store and back home the transmission squeals loudly after engaging reverse. Not drive, or any other gear. Just reverse, It idles in park at about 1k rpms but after engaging reverse it squeals loudly for about 5-7 seconds and drags the engine down to about 500 rpm. SO, any advice to why this might be happy would be REALLY useful!

Oh, and the transmission is a 1966 c4 (mostly, It's got a 67 valvebody, and a couple other 65/67 parts) Beforehand it was slipping in 2-3 so we replaced the bands and frictions.
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Unread 4 Weeks Ago   #2 (permalink)
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Is it one of the belts on the front of the motor squeaking? Try to narrow down where the squeal is coming from.
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Unread 4 Weeks Ago   #3 (permalink)
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I can say it's definitely not the front belts, They dont make any noise. The sound only happens when putting it in reverse. Along with the engine dying eventually in reverse, which doesn't happen when it idles in drive.
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Unread 4 Weeks Ago   #4 (permalink)
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when you put it in reverse, does it move in reverse or does it feel like it is fighting it's self,,kinda like it's not completely coming out of the forward gear,,,i'm thinking that maybe one of the valves in the valvebody is sticking,,,
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Unread 4 Weeks Ago   #5 (permalink)
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It shifts into reverse no problem and it pulls itself along fine (if you can keep the RPM's up high enough to keep it from dying)
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Unread 4 Weeks Ago   #6 (permalink)
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As an update, after taking off the Inspection cover, the noise mysteriously stopped so.. If it happens again i'll post about it but i'd like to have people's opinions still because i'm not entirely sure that the inspection cover was the true solution.
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The inspection cover had nothing to do with it. IF IT DID, IT WOULD MEAN THAT THE FLEXPLATE WAS MOVING FORWARD IN REVERSE AND HITTING THE COVER. THIS IS HOPEFULLY IMPOSSIBLE.
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Do you have a drain plug on your torque converter and is it lined up with the hole on your flywheel??
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The torque converter does have a drain plug and if i remember correctly, yes it is lined up with the holes.
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-bump- and in addition to the problems, we also have discovered a serious "clattering" sound while under load. Engine was relatively hot, during a quick sprint down the road after rounding a corner the sound appeared at about 2,500rpm right before it would've shifted into 3rd. If I can somehow manage to find a video of a similar sound or record it during a test drive i'll post it.

Another sound that I've been hearing is a slight ticking sound, sounds like the lifters but it has roller tip rockers. Could this be the source of that noise?
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hello;


CLATTERING

Do you know what detonation sounds like? the clatter might have been caused by incorrect timing, overheating, using gas with too low of an octane rating.


TICKING

Adjust the lifters.

lay a straight edge across the tops of the rocker studs. If any are high, they might be pulling out.

They might be varnished, try putting a qt of Rislone or similar in the oil and drive around for a few days with it. Be careful not to overfill the eng.
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Quote:
Originally Posted by ronson View Post
hello;


CLATTERING

Do you know what detonation sounds like? the clatter might have been caused by incorrect timing, overheating, using gas with too low of an octane rating.


TICKING

Adjust the lifters.

lay a straight edge across the tops of the rocker studs. If any are high, they might be pulling out.

They might be varnished, try putting a qt of Rislone or similar in the oil and drive around for a few days with it. Be careful not to overfill the eng.
.
Hi, Firstly Yes I do know what detonation sounds like and my dad seems to believe that's what it is but it hasn't done it on any other test runs until now but after retarding the timing quite a bit the clattering didn't go down any. Also, as far as fuel goes it's 87 octane with 108 booster but it has sat for about 4 months so I think this could be the problem. Also, I suppose it would be worth mentioning that it didn't make the clattering before adjusting the lifters and it didn't do it until it was up to operating temp.

Secondly, we adjusted the lifters because this was happening yet the ticking still persists.
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