throw out bearing orientation
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
Any chevy bellhousing will bolt up. The difference is what will work with the flywheel/clutch. If you want pics, go to Ebay, search for chevy bellhousing. You'll find SBC (403?) with the square lower passenger corner, 621 BBC with the half round starter pocket, and truck with the larger bearing retainer cutout and 5th bolt hole.
Before anyone criticizes, Yes 153 flywheels can be found on big blocks and 168 on small blocks. Just speaking in general terms.
Are you wanting to make this "right" or just getting it back on the road?
And here's a pic of the truck bell, car bearing retainer, and spacer.
Before anyone criticizes, Yes 153 flywheels can be found on big blocks and 168 on small blocks. Just speaking in general terms.
Are you wanting to make this "right" or just getting it back on the road?
And here's a pic of the truck bell, car bearing retainer, and spacer.
Last edited by Garys 68; Oct 19, 2014 at 01:28 PM.
Thread Starter
Burning Brakes
Joined: Apr 2011
Posts: 975
Likes: 108
From: Phoenix, AZ
The pressure plate in this photograph matches the one I removed. After searing through several vendors, I cannot locate the same one. Do you recall where it was purchased? Thanks.
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Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
I can tell you what it is exactly and it wont help you AT ALL.
Re read my last post and tell me what you want to do.....
My guess, your car came with a 168 tooth flywheel and 11" clutch originally and a 621 bell.
Along the way, the flywheel was swapped out with a 153 tooth and a 10.4 clutch. How the truck bellhousing got on there, I have no idea. But that's probably the cause of your trans issues.
So you have a mess of mismatched parts. Asking me for another mismatched part wont help.
What do you want to do?
[/QUOTE]
Re read my last post and tell me what you want to do.....
My guess, your car came with a 168 tooth flywheel and 11" clutch originally and a 621 bell.
Along the way, the flywheel was swapped out with a 153 tooth and a 10.4 clutch. How the truck bellhousing got on there, I have no idea. But that's probably the cause of your trans issues.
So you have a mess of mismatched parts. Asking me for another mismatched part wont help.
What do you want to do?
[/QUOTE]
Thread Starter
Burning Brakes
Joined: Apr 2011
Posts: 975
Likes: 108
From: Phoenix, AZ
I can tell you what it is exactly and it wont help you AT ALL.
Re read my last post and tell me what you want to do.....
My guess, your car came with a 168 tooth flywheel and 11" clutch originally and a 621 bell.
Along the way, the flywheel was swapped out with a 153 tooth and a 10.4 clutch. How the truck bellhousing got on there, I have no idea. But that's probably the cause of your trans issues.
So you have a mess of mismatched parts. Asking me for another mismatched part wont help.
What do you want to do?
Re read my last post and tell me what you want to do.....
My guess, your car came with a 168 tooth flywheel and 11" clutch originally and a 621 bell.
Along the way, the flywheel was swapped out with a 153 tooth and a 10.4 clutch. How the truck bellhousing got on there, I have no idea. But that's probably the cause of your trans issues.
So you have a mess of mismatched parts. Asking me for another mismatched part wont help.
What do you want to do?
Gary, this evening I counted 168 teeth on the flywheel. After taking a bit more care to measure the diameter, it stretches to 14". The transmission functions flawlessly, at least for nearly three years. It is the whine, that to the best of my ability, is traceable to the throwout bearing.
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
You actually counted? Damn. The 168 14" would be correct. From your earlier post, you indicated it was the smaller 153 flywheel. I thought that might be the reason the pressure plate overlapped.
I'm not sure why your pressure plate overlaps or if that's an issue. The clutch in my pic is for a 69 corvette with 14" flywheel. Mine is a Sachs k5552-03, bought at Oreileys.
You still have a MAJOR issue with the bellhousing if you're using a trans with the small auto bearing retainer and the truck bell with larger cutout. The trans is centered on the bell by the bearing retainer in the bell cutout. It should be within 0.010 of center. The bolts just hold it.
Take a measurement of the trans retainer diameter and bell cutout. Auto retainer: 4.683 and truck bell cutout 5.124. If yours has these dimensions and no spacer ring (in above pic), you'll have trans problems. That's probably the cause of your whine (pilot bearing, trans input shaft bearing, or gear misalignment).
Gary, this evening I counted 168 teeth on the flywheel. After taking a bit more care to measure the diameter, it stretches to 14". The transmission functions flawlessly, at least for nearly three years. It is the whine, that to the best of my ability, is traceable to the throwout bearing.
[/QUOTE]
I'm not sure why your pressure plate overlaps or if that's an issue. The clutch in my pic is for a 69 corvette with 14" flywheel. Mine is a Sachs k5552-03, bought at Oreileys.
You still have a MAJOR issue with the bellhousing if you're using a trans with the small auto bearing retainer and the truck bell with larger cutout. The trans is centered on the bell by the bearing retainer in the bell cutout. It should be within 0.010 of center. The bolts just hold it.
Take a measurement of the trans retainer diameter and bell cutout. Auto retainer: 4.683 and truck bell cutout 5.124. If yours has these dimensions and no spacer ring (in above pic), you'll have trans problems. That's probably the cause of your whine (pilot bearing, trans input shaft bearing, or gear misalignment).
Gary, this evening I counted 168 teeth on the flywheel. After taking a bit more care to measure the diameter, it stretches to 14". The transmission functions flawlessly, at least for nearly three years. It is the whine, that to the best of my ability, is traceable to the throwout bearing.
[/QUOTE]
Last edited by Garys 68; Oct 22, 2014 at 05:01 AM.
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
I honestly couldn't tell you, I've only seen them offered on ebay. It doesn't look to be too difficult to drill and pin it to the bellhousing though.
But with 621 bellhousings under $200, I've never seen a reason to use the truck bell. Although with the Chinese repos for $160 on ebay, expect to need offset pins to center it. At least the I bought was 0.020" off.
But with 621 bellhousings under $200, I've never seen a reason to use the truck bell. Although with the Chinese repos for $160 on ebay, expect to need offset pins to center it. At least the I bought was 0.020" off.
Last edited by Garys 68; Oct 22, 2014 at 04:33 PM.
Thread Starter
Burning Brakes
Joined: Apr 2011
Posts: 975
Likes: 108
From: Phoenix, AZ
Any chevy bellhousing will bolt up. The difference is what will work with the flywheel/clutch. If you want pics, go to Ebay, search for chevy bellhousing. You'll find SBC (403?) with the square lower passenger corner, 621 BBC with the half round starter pocket, and truck with the larger bearing retainer cutout and 5th bolt hole.
[/URL]
[/URL]Purchased from CF member 1960fi, a.k.a. George.
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Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
You'll be happy you're doing things right.
Was the old trans wobbling around in the big truck bell bearing retainer cutout?
Btw, did you figure what your pressure plate/clutch were for? Did their part numbers come back for an 11" vette or 12" truck?
Was the old trans wobbling around in the big truck bell bearing retainer cutout?
Btw, did you figure what your pressure plate/clutch were for? Did their part numbers come back for an 11" vette or 12" truck?
Thread Starter
Burning Brakes
Joined: Apr 2011
Posts: 975
Likes: 108
From: Phoenix, AZ
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
OK, "wobbling" around was just an expression. Without the correct bellhousing cutout to center it, the input shaft would bind on the pilot bearing, wearing it out. The input shaft not being centered would also bind on the trans input shaft bearing and misalingnment could damage the input shaft gear or countershaft. Probably the cause of your whining.