General Motors transmissions
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==Bellhousing bolt patterns== | ==Bellhousing bolt patterns== | ||
| − | The following is a list of GM bellhousing patterns: | + | The following is a list of GM bellhousing patterns. This section is based on wiki article [http://en.wikipedia.org/wiki/List_of_GM_bellhousing_patterns List of GM bellhousing patterns]. |
| − | ===Chevrolet | + | ===Chevrolet pattern=== |
[[image:Chevy_bell_pattern.jpg|thumb|300px|Chevy bolt pattern]] | [[image:Chevy_bell_pattern.jpg|thumb|300px|Chevy bolt pattern]] | ||
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* Chevrolet small and big block V8 | * Chevrolet small and big block V8 | ||
* GM 90° V6 (200/229/4.3L) | * GM 90° V6 (200/229/4.3L) | ||
| − | * GM Iron Duke RWD inline 4 (early RWD variants, later versions may use a FWD pattern, and have two possible starter locations) | + | * GM [http://en.wikipedia.org/wiki/GM_Iron_Duke_engine Iron Duke] RWD inline 4 (early RWD variants, later versions may use a FWD pattern, and have two possible starter locations) |
* Jeep with GM Iron Duke inline 4 2.5L/151cid (1980-'83). These use a MOPAR Torqueflite 904 automatic transmission with an integral Chevrolet bellhousing. Do not confuse with later AMC 2.5L engine that uses the GM metric pattern (see below). | * Jeep with GM Iron Duke inline 4 2.5L/151cid (1980-'83). These use a MOPAR Torqueflite 904 automatic transmission with an integral Chevrolet bellhousing. Do not confuse with later AMC 2.5L engine that uses the GM metric pattern (see below). | ||
* Chevrolet inline 6 (1963-up) | * Chevrolet inline 6 (1963-up) | ||
* Chevrolet 153 inline 4 (Chevy II, pre-Iron Duke, includes the Vortec 3000/181 industrial/marine crate engine) | * Chevrolet 153 inline 4 (Chevy II, pre-Iron Duke, includes the Vortec 3000/181 industrial/marine crate engine) | ||
| − | * GM Atlas engine | + | * GM [http://en.wikipedia.org/wiki/GM_Atlas_engine Atlas engine] |
===Buick, Oldsmobile, Pontiac (BOP) V8 pattern=== | ===Buick, Oldsmobile, Pontiac (BOP) V8 pattern=== | ||
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* Buick big block and 1963-up small block V8 | * Buick big block and 1963-up small block V8 | ||
* Buick pre-3800 90° RWD V6 | * Buick pre-3800 90° RWD V6 | ||
| − | * Jeep | + | * Jeep [http://en.wikipedia.org/wiki/Buick_V6_engine#Dauntless Dauntless 225cid oddfire V6] (1967-'74) |
| − | * Cadillac cast iron V8 after 1967 (1968-85 368, 425, 472 and 500cid V8) | + | * Cadillac cast iron V8 after 1967 (1968-'85 368, 425, 472 and 500cid V8) |
| − | + | Starters are on the driver side on Olds 350-455 and Pontiac, and the passenger side on Cadillac 425/472/500 and Buick 225/231/300/340/350/400/430/455. | |
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===Uni-bell pattern=== | ===Uni-bell pattern=== | ||
| − | This photo shows a multi-pattern case. | + | This photo shows a multi-pattern case. Both the BOP and Chevrolet pattern on the same bell housing. |
[[image:Multi_pattern_bell.jpg|thumb|left|300px|Uni-bell pattern]] | [[image:Multi_pattern_bell.jpg|thumb|left|300px|Uni-bell pattern]] | ||
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[[File:GM 60deg V6 bellhousing.JPG|thumb|200px|GM 60 degree pattern]] | [[File:GM 60deg V6 bellhousing.JPG|thumb|200px|GM 60 degree pattern]] | ||
The GM metric pattern is also called the GM ''small corporate pattern'' and the ''S10 pattern''. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the passenger side of the block. The 2.2L S10/Sonoma had the starter located in the same position as front wheel drive cars. A rear wheel drive bellhousing is displayed at right. | The GM metric pattern is also called the GM ''small corporate pattern'' and the ''S10 pattern''. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the passenger side of the block. The 2.2L S10/Sonoma had the starter located in the same position as front wheel drive cars. A rear wheel drive bellhousing is displayed at right. | ||
| − | * GM 60 degree V6 2.8/3.1/3.4/3.5/3.9L V6 (also used by AMC) | + | * GM [http://en.wikipedia.org/wiki/GM_60-Degree_V6_engine 60 degree V6] 2.8/3.1/3.4/3.5/3.9L V6 (also used by AMC) |
| − | * Buick V6 3300/3800 V6 | + | * [http://en.wikipedia.org/wiki/Buick_V6_engine Buick V6] 3300/3800 V6 |
| − | * Cadillac 4.1/4.5/4.9L V8 | + | * Cadillac [http://en.wikipedia.org/wiki/Cadillac_V8_engine#HT-4100 4.1/4.5/4.9L V8] |
* Isuzu 3.5L DOHC V6 | * Isuzu 3.5L DOHC V6 | ||
| − | * GM Iron Duke/Tech-4 2.5L inline 4 | + | * GM [http://en.wikipedia.org/wiki/GM_Iron_Duke_engine Iron Duke]/Tech-4 2.5L inline 4 |
| − | * GM "122" 1.8/2.0/2.2L inline 4 | + | * GM [http://en.wikipedia.org/wiki/GM_122_engine "122"] 1.8/2.0/2.2L inline 4 |
| − | * AMC/Chrysler 2.5L inline | + | * AMC/[http://en.wikipedia.org/wiki/Chrysler_2.2_%26_2.5_engine#2.5 Chrysler 2.5L inline 4] engine found in Jeep Cherokee, Comanche, Wagoneer, CJ, Wrangler, and Dodge Dakota |
| − | * GM 5.3L LS4 V8 | + | * GM [http://en.wikipedia.org/wiki/GM_LS_engine#5.3_L_2 5.3L LS4] V8 |
| − | * GM 3.5L LX5 V6 | + | * GM [http://en.wikipedia.org/wiki/Northstar_engine_series#LX5_.28Shortstar.29 3.5L LX5 V6] "Shortstar" |
<br style="clear:both"/> | <br style="clear:both"/> | ||
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===Northstar pattern=== | ===Northstar pattern=== | ||
| − | [[File:Northstar2.jpg|thumb|300px|]] | + | [[File:Northstar2.jpg|thumb|300px|Northstar pattern, somewhat resembles GM 60 degree pattern]] |
Nearly identical to the GM small corporate/metric pattern, except that the starter is located between the cylinder banks, and the lower right bolt hole is moved outward by roughly one inch. It shares the distinctive odd-sided hexagonal shape of the 60 degree metric pattern. | Nearly identical to the GM small corporate/metric pattern, except that the starter is located between the cylinder banks, and the lower right bolt hole is moved outward by roughly one inch. It shares the distinctive odd-sided hexagonal shape of the 60 degree metric pattern. | ||
| − | * Cadillac Northstar V8 | + | * Cadillac [http://en.wikipedia.org/wiki/Northstar_engine_series#Northstar_series Northstar V8] |
| − | * Oldsmobile Aurora L47 V8 | + | * [http://en.wikipedia.org/wiki/Oldsmobile_Aurora Oldsmobile Aurora] L47 V8 |
<br style="clear:both"/> | <br style="clear:both"/> | ||
===GM Ecotech=== | ===GM Ecotech=== | ||
* GM [http://en.wikipedia.org/wiki/GM_Family_II_engine#Ecotec Ecotech] DOHC inline 4 | * GM [http://en.wikipedia.org/wiki/GM_Family_II_engine#Ecotec Ecotech] DOHC inline 4 | ||
| − | [[File:Ecotec2.jpg|thumb|center|400px]] | + | [[File:Ecotec2.jpg|thumb|center|400px|Ecotec pattern]] |
<br style="clear:both"/> | <br style="clear:both"/> | ||
| − | ===Buick and Rover V8 | + | ===Buick and Rover aluminum V8 pattern=== |
| − | + | [[File:215 bell.jpg|thumb|300px|Buick/Rover aluminum V8 pattern]] | |
| − | + | ||
| − | ===Cadillac V8, pre- | + | *1961 through 1963 Buick/Oldsmobile/Pontiac [http://en.wikipedia.org/wiki/Buick_V8_engine#215 215 aluminum V8] |
| − | Early Cadillacs manufactured | + | **Buick 198 cid V6 |
| + | *1967 through 2004 [http://en.wikipedia.org/wiki/Rover_V8_engine Rover 3.5, 3.9, 4.0, 4.2, and 4.6L aluminum V8] (based on the 215 Buick aluminum V8) | ||
| + | <br style="clear:both"/> | ||
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| + | ===Cadillac V8, pre-1968 pattern=== | ||
| + | {| | ||
| + | |[[File:331ID49-54.JPG|thumb|300px|center|Cad 1949-'54 331 ci pattern. Note cast in partial bellhousing]] | ||
| + | |[[File:CADblockID.JPG|thumb|300px|center|Cad 1955-'64 331, 365, 390 cid pattern]] | ||
| + | |} | ||
| + | Early Cadillacs manufactured from 1949 to 1954 used a "round top" bellhousing partially cast into the block casting. Around 1955 the bellhousing pattern was revised until the BOP bolt pattern was adopted. | ||
| + | <br style="clear:both"/> | ||
==Speedometer== | ==Speedometer== | ||
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;Crankshaft Coalition Wiki articles | ;Crankshaft Coalition Wiki articles | ||
*[http://www.crankshaftcoalition.com/wiki/Category:Transmission Transmission category] | *[http://www.crankshaftcoalition.com/wiki/Category:Transmission Transmission category] | ||
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[[Category:Transmission]] | [[Category:Transmission]] | ||
[[Category:Good articles]] | [[Category:Good articles]] | ||
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