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Re: '74 Chev Cust Deluxe clutch slipping

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Posted by John Long on September 19, 2005 at 07:47:19 from (

In Reply to: '74 Chev Cust Deluxe clutch slipping posted by knute on August 30, 2005 at 17:21:48:

If you have free play and it's still slipping, like others say, it's time for a new clutch. Clutch kits vary in quality and price. How long do you plan to keep the truck and how long and/or hard do you plan to drive it? You can get a clutch kit with disc, pressure plate, throwout bearing, and alignment tool for as little as $135. Just go easy on it if you buy a cheap one. On the other extreme, if you plan to drive it hard, go with a Kevlar clutch (kevlar is the material). Also plan on getting the flywheel refaced. Your clutch will last longer. For as little as it costs, it makes a lot of sense.

Harbor Freight Tools sells a scissors lift transmission jack with a ratcheted strap that wraps around the transmission for $50. It isn't the greatest but it does the job. It's got a platform with a V in it and I've found this jack to be a very handy third hand for other tasks such as holding starters up while I connect the wiring or holding doors in place as I fasten the door hinges. using a level and tape, I measure the centerline angle of the transmission. Then with a piece of 3/4" plywood and blocking, I set a ramp under the truck at the same angle as the tranny for the jack to ride on. This makes sliding the tranny out and in much easier. When reinstalling the tranny, along with the alignment tool, if possible, I like to screw allthread studs into the bell housing where the top two transmission bolts go to help guide the tranny in. You are less likely to damage anything. Once the tranny is in, remove the studs and install the tranny bolts. Be cautious of obstructions on your tranny that may prevent removal of the studs once the tranny is in place.

Be sure to mark everything so it goes back together the way it came apart. Scrub and clean everything real good so you don't get grit on the new clutch parts as you handle them. Especially the mating surfaces of the engine, crankshaft, flywheel, bell housing, and transmission so grit doesn't cause any misalignments. The cleaner, the better. I like to use brake cleaner spray on machined mating surfaces. It dissolves the worst crud and dries fast.

If you have a removable transmission tunnel, your job just got that much easier because you've got twice as much access. You have to remove the seat and carpet but it gives you the opportunity to scrub the bare metal floor and shampoo the carpet to remove those musty odors that come with old trucks. Especially under the seats.

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