Gm release bearing height ?
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Instructor
Joined: Jun 2016
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From: Savannagh, Ga
Gm release bearing height ?
Looking at gm short release bearings on summit racing. by application for a 71 vette. there seems to be a lot of different heights on these bearings. does anyone no the actual height of the genuine Gm bearing that came in these cars ?. the bearing that came with my mcleod kit is 1.225" overall length. the hays 70-104 is 1.475" the mcleod 3-way adjustable bearing part # 16505 is 1.345--1.530--1.700
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Melting Slicks
Joined: Dec 2009
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From: Thunder Bay
The prevailing wisdom is that there were basically two heights of release bearings in GM vehicles. My buddy who works in the parts department tells me that isn't true and I don't know enough to argue with him. The one I used with my Centerforce clutch was short - about 1 1/4". I also used an adjustable pivot ball to fine tune things. If you do a search there is some excellent literature on this site (and around the web) on the correct clutch linkage geometry.
Thread Starter
Instructor
Joined: Jun 2016
Posts: 169
Likes: 39
From: Savannagh, Ga
The prevailing wisdom is that there were basically two heights of release bearings in GM vehicles. My buddy who works in the parts department tells me that isn't true and I don't know enough to argue with him. The one I used with my Centerforce clutch was short - about 1 1/4". I also used an adjustable pivot ball to fine tune things. If you do a search there is some excellent literature on this site (and around the web) on the correct clutch linkage geometry.
I discovered my 621 bellhouse had the wrong clutch ball in it. it was 1 3/8 total length. it is suppose to be 1.5" long. I replaced with correct one. and a new clutch fork and it shifts like new now. from what I read the 1 3/8 clutch fork ball is not a normal size ball for a chevy ? and they were put in 66 vettes by mistake and recalled. ? my car is a 71 small block and I don't think iit came with the 11" 621 bellhouse. maybey it came from a recalled 66 I don't no ?
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Melting Slicks
Joined: Dec 2009
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From: Thunder Bay
I discovered my 621 bellhouse had the wrong clutch ball in it. it was 1 3/8 total length. it is suppose to be 1.5" long. I replaced with correct one. and a new clutch fork and it shifts like new now. from what I read the 1 3/8 clutch fork ball is not a normal size ball for a chevy ? and they were put in 66 vettes by mistake and recalled. ? my car is a 71 small block and I don't think iit came with the 11" 621 bellhouse. maybey it came from a recalled 66 I don't no ?
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Last edited by drwet; Jan 6, 2019 at 11:55 AM.
Tech Contributor
Joined: Aug 1999
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From: At my Bar drinking and wrenching in Lafayette Colorado
Looking at gm short release bearings on summit racing. by application for a 71 vette. there seems to be a lot of different heights on these bearings. does anyone no the actual height of the genuine Gm bearing that came in these cars ?. the bearing that came with my mcleod kit is 1.225" overall length. the hays 70-104 is 1.475" the mcleod 3-way adjustable bearing part # 16505 is 1.345--1.530--1.700
I provided you this info in your other post on 12/21.
https://www.corvetteforum.com/forums...utch-fork.html
Do you read the answers you get when you post..?
Last edited by lars; Jan 7, 2019 at 06:11 PM.
