1991 700R4 binding in reverse after rebuild - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-16-2004, 08:37 PM
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1991 700R4 binding in reverse after rebuild

Hey guys,
Tranny has about 10000miles on it and today after driving about 3miles from work to home, parked it for 2hours, went back in to back out of my driveway, and the truck felt like it was binding, I didnt oush it. I just went forward a bit and tried reverse again, it would go back a bit then get stuck/jammed. If I put it in Nutreal, it will roll back, so I guess that would eliminate all the rest of the drivetrain, right. What should I be focusing on or looking for that would cause the tranny to do this?? Thanks for any advice guys.
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Old 08-17-2004, 09:37 AM
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A better question would be how do I check to see if this a pysical bind or something causing the bind hydraulicly, like a sticking valve in the valve body??
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Old 08-17-2004, 03:33 PM
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It could be a number of things including improper clearance in the clutch packs or missassembly or malfuntion in the valve body.
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Old 08-18-2004, 06:41 AM
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well now

First you should pull the pan and check for any debris.
This will give you a better idea.
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Old 08-18-2004, 03:18 PM
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Yeah, first thing Ill probably do short of pulling the trans is check all the valves in the valvebody and make sure there all free. Maybe a stuck valve is keeping one of the clutch packs in the input drum engaged?? Otherwise Im guessing it has to be something binding in the low/rev clutches or rev input drum??
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Old 08-18-2004, 05:09 PM
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think

planetary.
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Old 08-20-2004, 01:44 PM
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I can say with almost complete cirtainly that it isn't the planitary gears
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Old 08-21-2004, 07:38 AM
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Cool

I would think a planetary unit would be noisy in forward motion to bind up in reverse.

If the tranny binds up in manual LOW gear too...... then I would guess the center support snap ring popped out and the gear train is binding up when the rear low/reverse clutch comes on.
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Old 08-21-2004, 10:43 PM
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jeash Crosley! how do you know all that stuff! open up alot of wierd acting trannys, then happen to remember what was wrong! amazing, i cant even remember what i did yesterday sometimes! hopefully my memory will get better with age!
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Old 08-22-2004, 05:22 AM
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Um

quote
" I would think a planetary unit would be noisy in forward motion to bind up in reverse.

If the tranny binds up in manual LOW gear too...... then I would guess the center support snap ring popped out and the gear train is binding up when the rear low/reverse clutch comes on. "
end quote

Correct me if I'm wrong but aren't a gear train and planetary like you know the same thing?

Last edited by stu; 08-22-2004 at 06:38 AM.
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Old 08-22-2004, 08:25 AM
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Cool Re: Um

stu,

You are talking about a broken planet unit. I would think in forward gears the planet would be trouble too in first gear and 4th..... I see no mention of that in the original post. Perhaps I missed it?

In the situation I am talking about IE; the center support snap ring is loose/out of position.... The low / reverse piston pushes on the low/reverse clutch pack as it is designed to.

With NO snap ring to hold the center support in place, everything is pushed forward into the drive shell, ring gear and front planetary where there is another snap ring holding the mentioned parts onto the output shaft. With 150 - 180 psi things are pushed together tightly and bind up.

Since the low/reverse clutches are applied in manual low and reverse you will get the same bind up in forward and reverse that will confuse the uneducated person.

This also applies to the T-350 since the 4L60 & t-350 share the same design in the rear gear train area.

Tony


Quote:
Originally posted by stu
quote
" I would think a planetary unit would be noisy in forward motion to bind up in reverse.

If the tranny binds up in manual LOW gear too...... then I would guess the center support snap ring popped out and the gear train is binding up when the rear low/reverse clutch comes on. "
end quote

Correct me if I'm wrong but aren't a gear train and planetary like you know the same thing?
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Old 08-22-2004, 08:59 AM
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Hm

I don't recall anything about a broken planetary.
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Old 08-22-2004, 11:01 AM
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Cool Re: Duh, my bad

stu ,

at your age I guess alzheimer's is a problem?

you said " think planetary"

The planetary(s) is either good or broken.

Your turn


Quote:
Originally posted by stu
I don't recall anything about a broken planetary.
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Old 08-22-2004, 12:03 PM
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yeah, yeah

Age has diddly squat to do with anything.

I do not read or infer anything into anything that isn't already there.
You are playing superman with xray vision eyes stating the snap ring popped out of position.
There are a myriad of possibilities.

My original quest was for him to remove the pan and check for debris.
I do not care for the direction this is going.
I know when I leave I will be lambasted.
But that is the way some people operate.

I will not bother this forum again.
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Old 08-24-2004, 01:29 PM
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Cool Re: yeah, yeah

stu,

no lambasting is allowed on this bbs.

the age comment was my poor attempt at a joke. Perhaps you are unfamilar with E-motions used on the internet

I am not playing superman with my guess at the snap ring poping out. It is a process of diagnosing the problem. That is why I asked if the tranny binds up in manual low gear too.

Attempting a few simple tests before pulling the pan will aid in the diagnose of the problem.

Your mention of "think planetary" only points at a bad unit if the trany is binding up. If a torrington bearing comes apart the planet willl be noisy forward or backward. I am sure you know this

the original post did not mention who built the tranny. Some DIY types can install the snap ring incorrectly. After few miles the snap ring can pop out and cause problems.


Quote:
Originally posted by stu
Age has diddly squat to do with anything.

I do not read or infer anything into anything that isn't already there.
You are playing superman with xray vision eyes stating the snap ring popped out of position.
There are a myriad of possibilities.

My original quest was for him to remove the pan and check for debris.
I do not care for the direction this is going.
I know when I leave I will be lambasted.
But that is the way some people operate.

I will not bother this forum again.
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