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Old September 28th, 2010, 01:09 AM   #1
chevyk10
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Default 92 F150 manual transmission problems (updated)

Long story short, my 92 Ford F150 with the 5 speed manual got really hard to put into gear out of nowhere today. Now its at the point where it feels like the clutch doesn't even do anything because it starts taking off and stalls as soon as I put the truck in gear, even with the clutch pedal down. I checked the hydraulic fluid and there was nothing in it, so I filled it up and its still doing it. Is the transmission fucked or do I just need to bleed the clutch now? I don't know too much about manuals except that its possible to get air in the lines and then the clutch doesn't work. Please help! This is my work truck and I gotta get it back up and running asap.

Oh and the clutch is was replaced within the past few years so it shouldn't be going bad.


UPDATE:
Well now its acting up again. When I drive it it will become very hard to put into gear, then the next thing you know it goes in gear perfect again 10 minutes later. Its got fluid in it so maybe air in the lines, or bad slave cylinder? Any ideas???

Last edited by chevyk10; September 28th, 2010 at 02:22 PM.
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Old September 28th, 2010, 01:35 AM   #2
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If it is anything like a ranger, the slave cylinder probably went oit
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Old September 28th, 2010, 01:59 AM   #3
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If it is anything like a ranger, the slave cylinder probably went oit

Most likely. I just filled it up with fluid, and let it sit and run for like 20 minutes and the clutch works perfect now.
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Old September 28th, 2010, 09:49 AM   #4
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I'd take a good look at your clutch master on the firewall (check inside the cabin for leaks) and the slave on the trans. that is not something you want to fail at a red light :)
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Old September 28th, 2010, 02:19 PM   #5
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I'd take a good look at your clutch master on the firewall (check inside the cabin for leaks) and the slave on the trans. that is not something you want to fail at a red light :)
Well now its acting up again. When I drive it it will become very hard to put into gear, then the next thing you know it goes in gear perfect again 10 minutes later. Its got fluid in it so maybe air in the lines, or bad slave cylinder? The clutch itself feels fine, but this extremely hard shifting thing keeps going on and off.

Last edited by chevyk10; September 28th, 2010 at 02:33 PM.
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Old September 28th, 2010, 02:32 PM   #6
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it sounds like the slave cylinder needs replaced, these are exactly like the rangers, they are on the input shaft,and are pretty easy to swap.
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Old September 28th, 2010, 11:37 PM   #7
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it sounds like the slave cylinder needs replaced, these are exactly like the rangers, they are on the input shaft,and are pretty easy to swap.
So if its a bad slave cylinder would it cause it to have trouble going into gears? Remember the clutch pedal always feels nice and firm like it should. Its just that sometimes I'll start up the truck and the tranny has the hardest time going into gear, then I shut the truck off and restart it and its fine again for a little while. I would think that if the transmission was bad it would have problems going into gear constantly, and not just every so often like its doing.
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Old September 29th, 2010, 08:08 AM   #8
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if the slave or master is leaking fluid out, air gets in. the pedal may feel ok, but the air can compress unlike the fluid and can shorten distance that the slave travels to release your clutch resulting in a travel much less than required to release the clutch completely. do you see any fluid leaking from your bellhousing or inside your cabin around the area of your clutch pedal? there is not a ton of fluid in the system, so it wont look like a huge leak.
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Old September 29th, 2010, 02:58 PM   #9
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Originally Posted by turnofftheradio View Post
if the slave or master is leaking fluid out, air gets in. the pedal may feel ok, but the air can compress unlike the fluid and can shorten distance that the slave travels to release your clutch resulting in a travel much less than required to release the clutch completely. do you see any fluid leaking from your bellhousing or inside your cabin around the area of your clutch pedal? there is not a ton of fluid in the system, so it wont look like a huge leak.
Yup, just looked everything over and you can see the brake fluid leaking right from the slave cylinder. Of course the one I have is an internal slave cylinder. Could anyone give me instructions on how to replace it? I know I'll have to drop the trans already.
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Old September 29th, 2010, 03:49 PM   #10
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First buy a new slave cyl it will come with a.tool to release the line. Use the tool to push the plastic collar on the line in to release it. Then remove trans and replace slave. The line seals shut when you remove it so the fluid doesn't drain. Also look at the arm the clutch.master hooks to on the pedal the bushings and stud like to wear out. They are available from the dealer. It's something to check if your already working on it.
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Old September 29th, 2010, 10:30 PM   #11
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Yup, just looked everything over and you can see the brake fluid leaking right from the slave cylinder. Of course the one I have is an internal slave cylinder. Could anyone give me instructions on how to replace it? I know I'll have to drop the trans already.
your best bet in gonna be to remove the entire clutch system as one unit and when you get it out try to get the sleeve to push in to release the line. if that doens't work you have a roll pin on the inside of the bellhousing you can knock out and pull it apart you just have to bleed the system when you get it back together,
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Old September 30th, 2010, 09:40 AM   #12
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Thanks guys, had my friend look at it yesterday and I'm pulling the trans out today. I'm just gonna replace the slave cylinder and the whole clutch system since I gotta take everything apart anyway.
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Old September 30th, 2010, 06:05 PM   #13
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Found the problem.... missing spring and a piece broken off the clutch. Check out the pic.
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Old October 5th, 2010, 12:38 AM   #14
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so we got the trans back in the truck and everythings working fine, but i just found out that i put too much fluid in the tranny and i think i blew out the rear seal (not the drive shaft seal) because its leaking pretty bad around that area. is it possible that that is what happend? i added about a quart too much.
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Old October 6th, 2010, 07:54 PM   #15
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You have a 100% hydraulic clutch. If you had problems, it is because you either had air in the line or your seals went bad and the fluid blew by. The spring that is missing on the clutch plate is only a dampener spring and is not a major component in the clutch system. When you replaced the master and slave cylinder and bled out the system, you solved the problem. As far as over filling the transmission, there is a DRAIN plug and a FILL plug. Remove the FILL plug and add fluid until it starts dripping out, put the plug back in. Since its a manual transmission, fluid level is not as critical as an automatic.
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