1978 GMC P-Series Transmission Seals & Gaskets
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National®Automatic Transmission Torque Converter SealGMC P-Series Automatic Transmission 1978, Automatic Transmission Torque Converter Seal by National®. Front. Width: 0.425". Inside Diameter: 1.875". Outside Diameter: 2.762". Housing Bore: 2.758". Flanged Outside Diameter: 3.045"....Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$4.83 - Timken®Automatic Transmission Manual Shaft SealGMC P15 / P25 Automatic Transmission 1978, Automatic Transmission Manual Shaft Seal by Timken®. Width: 0.192". Outside Diameter: 0.756". Housing Bore: 0.751". Timken offers the right seal to keep your vehicle running optimally. Timken...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$4.70
- National®Manual Transmission Input Shaft SealGMC P-Series Standard Transmission 1978, Manual Transmission Input Shaft Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge...Low swell in hydrocarbon fluidsDesign type: spring loaded; multi-lip$7.23 - $7.93
- National®Manual Transmission Output Shaft SealGMC P15 / P25 / P35 Standard Transmission 1978, Manual Transmission Output Shaft Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic...Low swell in hydrocarbon fluidsDesign type: spring loaded; multi-lip$2.92 - $12.90
- Timken®Automatic Transmission Extension Housing SealGMC P-Series 1978, Automatic Transmission Extension Housing Seal by Timken®. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants and help retain lubricants and...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$3.11 - $5.48
- Timken®Automatic Transmission Torque Converter SealGMC P-Series Automatic Transmission 1978, Automatic Transmission Torque Converter Seal by Timken®. Width: 0.425". Outside Diameter: 2.762". Housing Bore: 2.758". Timken offers the right seal to keep your vehicle running optimally....Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$5.03
- Timken®Manual Transmission Shift Shaft SealGMC P-Series Transmission 3-Speed 1978, Manual Transmission Shift Shaft Seal by Timken®. Width: 0.126". Outside Diameter: 1.006". Housing Bore: 1". Timken offers the right seal to keep your vehicle running optimally. Timken seals...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$4.94 - $8.13
- National®Automatic Transmission Extension Housing SealGMC P-Series Transmission with GMC THM400 Transmission 1978, Automatic Transmission Extension Housing Seal by National®. Without Boot. Width: 0.582". Inside Diameter: 1.887". Outside Diameter: 2.704". Housing Bore: 2.700". Don’t just...Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$5.49
- Pioneer Automotive®Extension Housing GasketGMC P-Series Transmission THM400 Transmission 1978, Extension Housing Gasket by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$5.37 - $7.57
- SKF®Automatic Transmission Oil Pump SealGMC P-Series Automatic Transmission 1978, Automatic Transmission Oil Pump Seal by SKF®. Front. Outside Diameter: 2.764". Take your vehicle out of your garage back to the road by replacing your worn out or defective part with the...Excellent replacement for your worn out or faulty partDesigned to restore original performance and reliability$4.67
- Fel-Pro®Manual Transmission Gasket KitGMC P-Series Standard Transmission 1978, Manual Transmission Gasket Kit by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering...Direct OEM replacement for a proper fitEnsures reliable sealing performance$7.99 - $28.90
- Timken®Automatic Transmission Extension Housing Seal KitGMC P-Series 1978, Automatic Transmission Extension Housing Seal Kit by Timken®. Seal and Bushing Kit. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants and...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$10.97 - $15.34
- Timken®Manual Transmission Input Shaft SealGMC P-Series 1978, Manual Transmission Input Shaft Seal by Timken®. Front. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants and help retain lubricants and...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$7.41 - $9.03
- ATP®Automatic Transmission Detent Cable SealGMC P-Series Transmission THM350 Transmission 1978, Automatic Transmission Detent Cable Seal by ATP®. Location: Detent Control Cable - Top Hat Boot. Inside Diameter: 0.375". Outside Diameter: 0.625". When reliability and OE performance...OE quality at an affordable priceOE fit and function$1.19
- ATP®Automatic Transmission Extension Housing SealGMC P-Series Automatic Transmission 1978, Automatic Transmission Extension Housing Seal by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made...OE quality at an affordable priceOE fit and function$1.76 - $4.94
- ATP®Automatic Transmission Governor SealGMC P-Series Transmission THM350 Transmission 1978, Automatic Transmission Governor Seal by ATP®. Location: Governor Cover. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE...OE quality at an affordable priceOE fit and function$0.79
- ATP®Automatic Transmission SealGMC P-Series Automatic Transmission 1978, Automatic Transmission Seal by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of premium quality...High quality at an affordable priceExpertly made from premium materials$1.06 - $1.71
- ATP®Selector Shaft SealGMC P-Series Automatic Transmission 1978, Selector Shaft Seal by ATP®. Outside Diameter: 0.75". When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of...OE quality at an affordable priceOE fit and function$1.62
- ATP®Speedometer Pinion SealGMC P-Series Transmission THM350 Transmission 1978, Speedometer Pinion Seal by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of premium...OE quality at an affordable priceOE fit and function$1.16 - $2.87
- National®Automatic Transmission Extension Housing Seal KitGMC P-Series Automatic Transmission 1978, Automatic Transmission Extension Housing Seal Kit by National®. Seal and Bushing Kit. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured...Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$8.72 - $12.82
- National®Automatic Transmission Manual Shaft SealGMC P-Series Automatic Transmission 1978, Automatic Transmission Manual Shaft Seal by National®. Width: 0.192". Inside Diameter: 0.500". Outside Diameter: 0.756". Housing Bore: 0.751". Don’t just repair a leak, prevent future problems...Low swell in hydrocarbon fluidsDesign type: spring loaded; multi-lip$4.71
- National®Manual Transmission Shift Shaft SealGMC P15 / P25 / P35 Transmission 3-Speed with GMC SM326 Transmission 1978, Manual Transmission Shift Shaft Seal by National®. Width: 0.156". Inside Diameter: 0.750". Outside Diameter: 1.010". Housing Bore: 0.999". Don’t just repair a...Low swell in hydrocarbon fluidsDesign type: spring loaded; multi-lip$4.67
- Pioneer Automotive®Automatic Transmission Oil Pump GasketGMC P-Series Automatic Transmission 1978, Automatic Transmission Oil Pump Gasket by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$6.98 - $7.06
- Pioneer Automotive®Automatic Transmission Oil Pump SealGMC P-Series Transmission THM400 Transmission 1978, Automatic Transmission Oil Pump Seal by Pioneer Automotive®. Front. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$8.95
- Pioneer Automotive®Automatic Transmission Valve Body GasketGMC P-Series Transmission THM350 Transmission 1978, Automatic Transmission Valve Body Gasket by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$6.31 - $10.09
- Pioneer Automotive®Extension Housing SealGMC P-Series Automatic Transmission 1978, Extension Housing Seal by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised....Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$4.27 - $6.11
- Pioneer Automotive®Gasket SetGMC P-Series Automatic Transmission 1978, Gasket Set by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$5.50 - $49.96
- Pioneer Automotive®Sealing RingGMC P-Series 1978, Sealing Ring by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$5.32 - $7.72
- Pioneer Automotive®Speedometer Pinion SealGMC P-Series Transmission THM350 Transmission 1978, Speedometer Pinion Seal by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$3.96 - $4.28
- Pioneer Automotive®Transmission SealGMC P-Series Automatic Transmission 1978, Transmission Seal by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$1.00 - $2.21
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