C6 transmission help
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C6 transmission help
I have a 1984 Ford f150 4x4 351w with a c6 transmission. I recently took the tranny out because my forward gears were blown and it wouldnt take off. However my reverse worked with full power. So i got another c6 from a friend that i know works (saw it in the truck and watched the truck move not a week prior). So i took this tranny and bolted it up to my truck and finally got all my drivelines vacuum hoses etc. hooked up. However after starting the truck it wouldnt take off. I did not replace the torque converter and wondered if this could be bad? Or maybe the intermediate band isnt adjusted right ( i believe when my buddy was pulling the tranny he might have loosened it)? Any info is greatly appreciated
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Also a bit more information. After i got all my lines and everything bolted up i started it up before attaching the drivelines to see if the shaft was turning and i put it in drive and it would spin a little at idle, but so would the four wheel drive shaft but i could grab it and stop it. When i would put it in reverse the shaft would turn but the same way as it does in drive.
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You have to replace the TQ converter.
Well Now you might have to replace both. The TQ converter is full of contaminants, from the blown tranny. By not replaceing it, you now contaminated your replacement C6. Ultimatly trashing it to.
Ussually the tranny and converter come together. Anyways, not you probably need both, again
Well Now you might have to replace both. The TQ converter is full of contaminants, from the blown tranny. By not replaceing it, you now contaminated your replacement C6. Ultimatly trashing it to.
Ussually the tranny and converter come together. Anyways, not you probably need both, again
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I did drain my torque converter and it had the same black burnt smelling fluid in it. Alot of people have told me torque converters dont tend to go bad and that mine couldnt be because reverse worked before the new transmission was installed. Any other advice. And thank you very much for your help
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Your findings, when draining your converter, are the reason for replaceing the converter in the first place. While the converter may not be bad, it is however contaminated and will contaminate the new tranny, and ultimatly be the reason for it not working.
Whether the converter is bad or not, isnt the reason for replaceing it. Infact, you can take the converter to a converter shop, have them split it open then clean the insides, then reassemble it and use it. Some HiPo converters come "Bolt Together" To change veins, stators ect, but also in the event of a tranny failure, to clean it out.
Bottom line, you cannot clean the converter with out taking it apart, if it is taken apart it need to be balanced upon assmble. Most people dont have that ability, so simply stated, Always replace the converter when replacing the tranny. Thats the safe bet.
Whether the converter is bad or not, isnt the reason for replaceing it. Infact, you can take the converter to a converter shop, have them split it open then clean the insides, then reassemble it and use it. Some HiPo converters come "Bolt Together" To change veins, stators ect, but also in the event of a tranny failure, to clean it out.
Bottom line, you cannot clean the converter with out taking it apart, if it is taken apart it need to be balanced upon assmble. Most people dont have that ability, so simply stated, Always replace the converter when replacing the tranny. Thats the safe bet.
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Transmission Rebuilder
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From: North Georgia
I would check to see if the pump is working.
Check the fluid level with the engine off, then check it with the engine running. The level should drop when the engine is running, this means the pump is working.
You might of not had the converter all the way in the transmission and damaged the pump when the engine was started. Its a very common mistake if your not familiar with transmissions.
You should have two splined shafts coming out of the pump, the outer one is the stator shaft and will not turn. The smaller splined shaft is the input shaft, you should be able to turn this one, and it can be pulled out of the transmission and if you leave it out the truck will not move.
I do not think your problem is with the converter.
Check the fluid level with the engine off, then check it with the engine running. The level should drop when the engine is running, this means the pump is working.
You might of not had the converter all the way in the transmission and damaged the pump when the engine was started. Its a very common mistake if your not familiar with transmissions.
You should have two splined shafts coming out of the pump, the outer one is the stator shaft and will not turn. The smaller splined shaft is the input shaft, you should be able to turn this one, and it can be pulled out of the transmission and if you leave it out the truck will not move.
I do not think your problem is with the converter.
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Well you can think... I know
You never put a converter from a blown tranny on the replacement tranny. Even if, by some grace of god, and his guardian angel looking over his shoulder, that he didnt have the splines lined up. Thats his mulligan. Replace the converter before your pump pushes fluid threw the contaminated converter, and into the tranny.
You never put a converter from a blown tranny on the replacement tranny. Even if, by some grace of god, and his guardian angel looking over his shoulder, that he didnt have the splines lined up. Thats his mulligan. Replace the converter before your pump pushes fluid threw the contaminated converter, and into the tranny.
Transmission Rebuilder
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From: North Georgia
Well you can think... I know
You never put a converter from a blown tranny on the replacement tranny. Even if, by some grace of god, and his guardian angel looking over his shoulder, that he didnt have the splines lined up. Thats his mulligan. Replace the converter before your pump pushes fluid threw the contaminated converter, and into the tranny.
You never put a converter from a blown tranny on the replacement tranny. Even if, by some grace of god, and his guardian angel looking over his shoulder, that he didnt have the splines lined up. Thats his mulligan. Replace the converter before your pump pushes fluid threw the contaminated converter, and into the tranny.
I am just saying I don't think its causing it not to move.
About the only time I have a converter that is the reason for no movement, the splines inside the converter are stripped. I don't think his are stripped because it worked in his last transmission and I have never seen a C6 converter strip the splines. Even if the converter is so blown up that it sounds like it has rocks inside, it still moves the vehicle in most cases.
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From: Mattawa Washington.
good idea to flush the cooler lines and install a new cooler. metal particles will embed in the soft aluminum of the cooler even after flushing and come loose later on.It the lines are aluminum I would replace them too, but yours are most likely steel lines.
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I would check to see if the pump is working.
Check the fluid level with the engine off, then check it with the engine running. The level should drop when the engine is running, this means the pump is working.
You might of not had the converter all the way in the transmission and damaged the pump when the engine was started. Its a very common mistake if your not familiar with transmissions.
You should have two splined shafts coming out of the pump, the outer one is the stator shaft and will not turn. The smaller splined shaft is the input shaft, you should be able to turn this one, and it can be pulled out of the transmission and if you leave it out the truck will not move.
I do not think your problem is with the converter.
Check the fluid level with the engine off, then check it with the engine running. The level should drop when the engine is running, this means the pump is working.
You might of not had the converter all the way in the transmission and damaged the pump when the engine was started. Its a very common mistake if your not familiar with transmissions.
You should have two splined shafts coming out of the pump, the outer one is the stator shaft and will not turn. The smaller splined shaft is the input shaft, you should be able to turn this one, and it can be pulled out of the transmission and if you leave it out the truck will not move.
I do not think your problem is with the converter.
I did make sure it was seated firmly on the converter and the input shaft does turn by hand but you answered my question about the outside shaft
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I already flushed the lines, i dont think that would cause the problems im having. Its like the one way clutch in the torque converter isnt putting out enough power. The shafts will turn if i put it in gear (without driveshaft on), but once i put the driveshaft on it wont move.
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I am not saying its a good idea to reuse a converter from a trans that has had a failure. We install a rebuilt converter into every transmission I build if we have to warranty it.
I am just saying I don't think its causing it not to move.
About the only time I have a converter that is the reason for no movement, the splines inside the converter are stripped. I don't think his are stripped because it worked in his last transmission and I have never seen a C6 converter strip the splines. Even if the converter is so blown up that it sounds like it has rocks inside, it still moves the vehicle in most cases.
I am just saying I don't think its causing it not to move.
About the only time I have a converter that is the reason for no movement, the splines inside the converter are stripped. I don't think his are stripped because it worked in his last transmission and I have never seen a C6 converter strip the splines. Even if the converter is so blown up that it sounds like it has rocks inside, it still moves the vehicle in most cases.
Couldnt the torque converter going out be a reason the transmission went bad in the first place? And it was leaking around the bellhousing area before slipping taking off (almost like it was taking off in second) It did a little better if i manually shifted but it still slipped pretty bad and would lose fluid pretty often
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