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Joined: Oct 2003
Posts: 10
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Joined: Oct 2003
Posts: 10
Does anyone have any info or how to articles on changing a clutch on a three speed tranny from a 1967 GMC with an inline 250 cid?

I just bought a parts chaser truck and the clutch is gone so I gotta replace it asap...
Novice here... :confused:
Thanks in advance
TD


South Texas Rod and Custom
Home of "The Goonrod"
Joined: Feb 2001
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TD,

1. Block the wheels
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2. Put truck safely up on jack-stands
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3. Disconnect the driveline, speedo cable, springs and linkage on the side of the tranny(should be keeper pins holding the rod ends to the arms on the transmission). Make sure the tranny is in neutral so you can set everything up the same way it came apart)
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4.If your truck has a rear mount at the transmission, it will need to be removed. You may need to use a jack to support the engine at the rear with a good thick piece of wood under the oil-pan.
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5.Remove the four bolts holding the transmission to the bellhousing. Trans. can now be removed. Be ware of oil that may leak out the rear of the trans. (you can use a plastic bag and a rubber-band to keep most of the oil from leaking out the rear of the trans.)
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6. remove the 6 bolts holding the pressure-plate to the flywheel. Once the 6-bolts are removed, the pressure-plate and or clutch disc may fall out on your head so beware eek
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7.Remove the flywheel so it can be resurfaced(be careful to not drop it on your head, it is heavy)Be sure to not use a brake lathe. Have it done correctly and the clutch will work correctly from the start.(use a 1 inch piece of angle iron wedged against the ring gear teeth and the side of the bellhousing to hold the flywheel from turning)
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8.Remove and replace the pilot bushing/bearing which is in the end of the crankshaft. You may need to fill the hole full of grease, use a large bolt that fits fairly snug in the hole and wrap a rag/towel around the bolt in the hole so you can smack the head of the bolt with a large hammer making the grease hydraulically force the bushing/bearing out cool (use a LITTLE grease in the new bushing/bearing.
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9. Install your flywheel(newly resurfaced)and torque the bolts to spec.(use a 1 inch piece of angle iron on the opposite side that you had it when you took the flywheel bolts loose).
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10.Stuff the clutch disc and pressure-plate up into the bellhousing. Then use the clutch allignment tool to hold the clutch disc centered in the end of the crankshaft.
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11. Get the pressure-plate bolts all started first and tighten them down slowly and evenly so the metal does not get distorted on the pressure-plate.
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12. Remove the allignment tool. Set up the NEW throw-out bearing in the clutch release fork and adjust the linkage so the TO bearing is held firmly in place by the clutch release fork.(makes it easier to stuff the transmission in cool
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13.Install the transmission carefully and do not let it hang inside the clutch disc, the weight will distort the center of the disc. Once the transmission is all the way in start one bolt to hold it there while you get the rest of the bolts started. Tighten evenly and slowly. Once they are snugged up, then tighten securely
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14.Install the springs & linkage, the speedo cable, the rear mount if it had one and the drive-line.
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15. Check the oil level and adjust the clutch free-play(3/4 inch at the pedal). Make sure the shifting works correctly.
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16. Test drive grin


There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
Joined: Oct 2003
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Thanks for taking the time to answer my question.
Your help is greatly appreciated....

Mechaniac U R DA MAN grin
TD


South Texas Rod and Custom
Home of "The Goonrod"

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