clutch problems with 460 swap
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clutch problems with 460 swap
i swapped a 360 for a 460 in my '71 3/4 highboy p/u everything seemed to be ok til i went to pull out of the garage. the clutch wouldn't release after some long lookin i found that the splines aren't long enough on the trans shaft causin the clutch to stay mashed to the flywheel even though the pressure plate is releasin i did check to make sure the clutch released without the trans bein bolted up and it did is there a different clutch i could use? no machine shops in the area can extend the splines and i don't want to just put a spacer in cuz i want to make sure the pilot shaft is in the bushin far enough i'd appreciate any help thanks. vern
Lead Driver
Joined: May 2004
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From: Abilene Kansas
are u sure that the bearing in the flywheel just isnt seazing on the shaft? ive had this happen a couple of times, or that the throwout isnt working right... little things like this would do it too
Matt
Matt
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the clutch disc won't slide all the way to the throwout bearin shaft i was told i could use my 360 flywheel it did bolt right up to crank and was told the balance wouldn't be affected i'm thinking about putting a spacer between tranny and bell housin as long as pilot shaft is in the bushin far enough. whats your thoughts on this it will probably need a 1/2" to 5/8" spacer if i do this
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i took the input shaft out of a '79 3/4 ton and put it in my '71 andcut about 1/8" off pilot shaft and it worked like a charm i just didn't have enough splines on the '71 input shaft thanks for your input. vern
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From: Spokane WA
are you using a 460 bellhousing, a HD 400 bellhousing or a 351M/LD 400 bellhousing?
They are all different depths.
The HD 400 bellhousing can be used without a spacer, but you HAVE to use a diaphram clutch.
The 351 bellhousing needs a spacer AND an 11" diaphram clutch, and sometime still needs some clearance grinding .
the 360/390 flywheel will bolt to all 460's but will only balance correctly on the older 79-down internal balance engines.
They are all different depths.
The HD 400 bellhousing can be used without a spacer, but you HAVE to use a diaphram clutch.
The 351 bellhousing needs a spacer AND an 11" diaphram clutch, and sometime still needs some clearance grinding .
the 360/390 flywheel will bolt to all 460's but will only balance correctly on the older 79-down internal balance engines.
Last edited by oldhalftons; Aug 7, 2005 at 07:23 PM.
