General Motors transmissions
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[[File:6L90 trans.jpg|thumb|left|330px|6L90 transmission.]] | [[File:6L90 trans.jpg|thumb|left|330px|6L90 transmission.]] | ||
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| + | ==Cooler lines== | ||
| + | {{Note1}}All except TH200C and TH2004R- which are opposite. | ||
| + | *Top line of the transmission = in [B][I]from[/I][/B] the cooler | ||
| + | *Bottom line of the transmission = out [B][I]to[/I][/B] the cooler | ||
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| + | ===TH350 adapters=== | ||
| + | GM uses an adapter which threads into the case cooler ports and is sealed with a washer. The adapter converts the thread to inverted flare for hard line usage. The cooler ports on the TH350 are usually a female 1/4"-18 NPSM (National Pipe Straight Mechanical (NPSM)) and use a metal washer/seal. The NPSM threads will fit a NPT (tapered) fitting, but if a tapered fitting is to be used, be careful to not over tighten it. | ||
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| + | ===TH350 fitting torque values=== | ||
| + | *Straight pipe fitting- 20 ft/lb | ||
| + | *Tapered pipe fitting- 15 ft/lb | ||
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| + | ===TH400 fitting torque values=== | ||
| + | *TH400 is 28 ft/lb. | ||
==Bellhousing bolt patterns== | ==Bellhousing bolt patterns== | ||
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