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What Clutch and flywheel do i need

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icelandgto

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HI my name is Julia and I have a 1986 chevy k1500 stepside modifyd for 46" tyres. I has the stock 305 cu in (5.0L v8 engine and a 4-speed Saginaw Muncie SM465 trans , np 208 tcase. All stock from factory in 1986

My Clutch and flywheel is shoot and i need new ones.

Now what i need to know what flywheel and a clutch kit i will need to replace the old one.
how many inces the flywheel is and how many bolts the flywheel and clutch will have , how many diameter input shaft and how many spline the SM465 has and the info i need to find the new clutch. I want to have the new parts before i start to remove the old clutch so all help is prisiated. :o

maby link to a right clunch and flywheel for sale ?

sorry if this is posted in the wrong place

thanks
 
Why would you need a new flywheel? Just turn the one you have when you take it out for the clutch job.

Martin
 
There is no need to replace the flywheel however once you get the truck apart you will need to take the flywheel to a machine shop and have them resurface it for you. Also if the teeth on the ring gear are bad they can install a new ring gear for you as well. As far as what size clutch you will need to wait until you have the clutch out as there are 2 different sizes that were available and so you'll need to have a parts store match them up. Don't forget to install a new pilot bearing and throwq out bearing as well.
 
The truck clutches are commonly 11", car clutches for the same engine are commonly 10". A 12" clutch fits just fine though, as long as you get the matching pressure plate.

The pressure plate is held on by 6 bolts. The SM 465 input is 1 1/8" diameter and is 10 spline.

i would recomend a diaphram clutch. Much better feel and lighter pedal effort than the other style which is a 3 finger pressure plate...commonly known as a Borg & Beck clutch.

A great brand of clutch kit is the Luk Pro-Gold. Don't get a re-manufactured clutch.

Rene
 
about the flywheel.. The clutch has been slipping for about 8 mounths but clutch died last weekend and i think the flywheel must by werry bad after all that clutch slip.
 
This is my truck.

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http://i72.photobucket.com/albums/i180/Hjalti_GTO/08092008001.jpg
 
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icelandgto said:
about the flywheel.. The clutch has been slipping for about 8 mounths but clutch died last weekend and i think the flywheel must by werry bad after all that clutch slip.
Click to expand...

The flywheel is basically a big thick chunk of steel. What tends to happen is they get heat scored (blue/brown discoloration), and surface cracks can develop. There is no need to replace it though, all of that can be machined out when you have it "re-surfaced". I think I paid $30 to have my flywheel resurfaced a couple of years ago.

Rene
 
With my SM465 I run a 12inch dual friction centerforce, been a great clutch, has been in my truck for about 6 years now, I've towed a 26 foot trailer many times, lots of wheeling, and stop and go traffic, and it still works and feels as good as the day I put it in.

As for your fly wheel, even with slipping you should be able to get it resurfaced, unless it has hot spots. If you take it out and its spotted like a leopard or dalmatian, then its time for a new one.
 
sheoldeblaze said:
With my SM465 I run a 12inch dual friction centerforce, been a great clutch, has been in my truck for about 6 years now, I've towed a 26 foot trailer many times, lots of wheeling, and stop and go traffic, and it still works and feels as good as the day I put it in.

As for your fly wheel, even with slipping you should be able to get it resurfaced, unless it has hot spots. If you take it out and its spotted like a leopard or dalmatian, then its time for a new one.
Click to expand...

Not true, the hot spots will surface out. I've been resurfacing flywheels for 22+ years and the hot spots have always surfaced out without a problem. The surface cracks on the other hand sometimes will not come all the way out but that doesn't affect the clutch from working properly and is of no concern it some still exist after it has been resurfaced.
 
icelandgto said:
about the flywheel.. The clutch has been slipping for about 8 mounths but clutch died last weekend and i think the flywheel must by werry bad after all that clutch slip.
Click to expand...

Have you re-geared? Those are massive, heavy tires and I would think you'd need something in the 4.88-5.13 range to relieve the stress on the driveline. Very good looking truck by the way! :waytogo:
 
TerryD said:
Have you re-geared? Those are massive, heavy tires and I would think you'd need something in the 4.88-5.13 range to relieve the stress on the driveline. Very good looking truck by the way! :waytogo:
Click to expand...

I'd go as far as saying 5.86 or deeper would be even better. Depends on the diffs though...if it has the 14 bolt rear the deepest available is 5.38...

Rene
 
TerryD said:
Have you re-geared? Those are massive, heavy tires and I would think you'd need something in the 4.88-5.13 range to relieve the stress on the driveline. Very good looking truck by the way! :waytogo:
Click to expand...

Yes i have re-geared it. it has 4:88 :D
And it has 14bolt rear
 
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