Transmission identification
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====Common bellhousing configurations==== | ====Common bellhousing configurations==== | ||
| − | Photo of a Chevrolet bell housing bolt pattern. | + | Photo of a Chevrolet bell housing bolt pattern. Notice the peak between the top two bolt holes on the bell housing. |
[[file:Chevy_bell_pattern.jpg|400px]] <br style="clear:both"/> | [[file:Chevy_bell_pattern.jpg|400px]] <br style="clear:both"/> | ||
| − | A dual pattern bellhousing bolt pattern was used on a | + | A dual pattern bellhousing bolt pattern was used on a few different GM automatics like the Th350C (some, not all) and TH2004R (most, except 60 degree "metric"/Cadillac). |
[[File:Th350C unicase.jpg|thumb|left|400px|Universal GM bellhousing bolt pattern]] <br style="clear:both"/> | [[File:Th350C unicase.jpg|thumb|left|400px|Universal GM bellhousing bolt pattern]] <br style="clear:both"/> | ||
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| − | Rear view of a TH2004R transmission with BOP design | + | Rear view of a TH2004R transmission with BOP design bellhousing bolt pattern. Notice the valley between the top two bolt holes. |
[[file:Buick-2004r.jpg|300px]] <br style="clear:both"/> | [[file:Buick-2004r.jpg|300px]] <br style="clear:both"/> | ||
| + | |||
| + | ====TH2004R info==== | ||
| + | [http://www.montecarloss.com/community/ubbthreads.php?ubb=showflat&Board=21&Number=401583&Searchpage=4&Main=46885&Words=&topic=1&Search=true#Post401583] | ||
| + | [http://www.gnttype.org/techarea/transmission/transpage.html] | ||
| + | [http://www.ckperformance.com/resources/GM2004RTRANSMISSIONS.html] | ||
| + | [http://www.t6p.com/forums/showthread.php?t=13542] | ||
| + | [http://www.gnttype.org/techarea/pictureguides/tranny/thm200vs350.html] | ||
===TH400 model ID codes=== | ===TH400 model ID codes=== | ||
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[[File:TH700-R4_ID.jpg]] | [[File:TH700-R4_ID.jpg]] | ||
| + | Reportedly there are three different TH700R4 cases. | ||
| + | *There is a case with no markings, it is the weakest and should be avoided for high performance duty | ||
| + | There is an '''MD8''' case, it's considered suitable for most performance duty | ||
| + | *Then there is the '''K''' case, it is the strongest TH700R4 case | ||
| + | These marking (if any) are found cast into the bellhousing on the passenger side. | ||
| + | *[http://www.transmissioncenter.net/700r4.htm TH700R4/4L60 info] | ||
===Fastener threads=== | ===Fastener threads=== | ||
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TH350 and TH400 transmission mount, speedometer, and solenoid bolts went metric about 1978. All other bolts were SAE to the end of production. | TH350 and TH400 transmission mount, speedometer, and solenoid bolts went metric about 1978. All other bolts were SAE to the end of production. | ||
| − | TH200C, TH2004R, TH700R4, and later transmissions used metric fasteners | + | TH200C, TH2004R, TH700R4, and later transmissions used metric fasteners. |
===Speedometer=== | ===Speedometer=== | ||
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[[File:Muncie gearsM20-21 VS M22.jpg|thumb|400px|left|]] <br style="clear:both"/> | [[File:Muncie gearsM20-21 VS M22.jpg|thumb|400px|left|]] <br style="clear:both"/> | ||
| − | |||
Link to a Muncie page showing [http://www.dandltransmission.com/muncieratio.html Muncie gear ratio, spline counts, exploded view, parts list, etc.] from D&L Transmissions. | Link to a Muncie page showing [http://www.dandltransmission.com/muncieratio.html Muncie gear ratio, spline counts, exploded view, parts list, etc.] from D&L Transmissions. | ||
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*[http://fiedlerh.home.att.net/BW.htm Borg Warner Second Design ST-10 4-Speed Info] Codes, applications; a very informative page. | *[http://fiedlerh.home.att.net/BW.htm Borg Warner Second Design ST-10 4-Speed Info] Codes, applications; a very informative page. | ||
*[http://pontiacpower.org/BW.htm Borg Warner Second Design ST-10 4-Speed Info] from Pontiac Power. | *[http://pontiacpower.org/BW.htm Borg Warner Second Design ST-10 4-Speed Info] from Pontiac Power. | ||
| + | *[http://www.chevyhiperformance.com/techarticles/46140_chevrolet_transmission_swap_guide/index.html Chevrolet Transmission Swap Guide - Swap Into Overdrive], a transmission swapping guide for early Chevrolets | ||
| + | *[http://www.wilcap.com/tech.html GM, MOPAR, and Ford bellhousing bolt patterns], including some manual tranny bolt patterns | ||
[[Category:Transmission]] | [[Category:Transmission]] | ||
[[Category:Identification and decoding]] | [[Category:Identification and decoding]] | ||
[[Category:Good articles]] | [[Category:Good articles]] | ||
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