{"title":"Transmission","description":null,"products":[{"product_id":"allison-a-trim-solenoid-lb7-lly-01-05-29533074","title":"ALLISON A TRIM SOLENOID LB7\/LLY 01-05","description":"\u003cp\u003e\u003c\/p\u003e\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eAllison A-Trim Pressure Control Solenoid\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cp\u003e\u003cstrong\u003ePart Number: 29533074\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\r\nThe Allison A-Trim Pressure Control Solenoid (29533074) is an OE-style replacement solenoid designed for 2001–2005 GM Duramax trucks equipped with Allison automatic transmissions. This solenoid installs in the valve body and plays a key role in regulating hydraulic pressure used for clutch apply control, helping the transmission maintain smooth, consistent shift quality under varying load conditions.\r\n\u003c\/p\u003e\r\n\r\n\u003cp\u003e\r\nAs solenoids age, internal wear and electrical issues can cause pressure control problems that show up as harsh shifts, delayed engagement, shift flare, or inconsistent shift feel. Replacing a weak or failing A-Trim solenoid helps restore proper hydraulic control and dependable drivability, especially during towing and daily-use situations where stable pressure control matters most.\r\n\u003c\/p\u003e\r\n\r\n\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eKey Features and Benefits\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003eOE-style replacement for Allison A-Trim pressure control function\u003c\/li\u003e\r\n  \u003cli\u003eHelps restore proper clutch apply pressure and shift consistency\u003c\/li\u003e\r\n  \u003cli\u003eDesigned to improve drivability by correcting pressure-related shift concerns\u003c\/li\u003e\r\n  \u003cli\u003eDirect-fit valve body solenoid for service or rebuild work\u003c\/li\u003e\r\n  \u003cli\u003eIdeal for preventative replacement during valve body service\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eCommon Symptoms of a Weak or Failed A-Trim Solenoid\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003eHarsh or erratic shifting\u003c\/li\u003e\r\n  \u003cli\u003eDelayed engagement into gear\u003c\/li\u003e\r\n  \u003cli\u003eShift flare or inconsistent shift timing\u003c\/li\u003e\r\n  \u003cli\u003ePressure control related drivability issues\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eApplications\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003e2001–2004 Chevrolet Silverado 2500HD 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2001–2004 Chevrolet Silverado 3500 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2001–2004 GMC Sierra 2500HD 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2001–2004 GMC Sierra 3500 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 Chevrolet Silverado 2500HD 6.6L Duramax LLY\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 Chevrolet Silverado 3500 6.6L Duramax LLY\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 GMC Sierra 2500HD 6.6L Duramax LLY\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 GMC Sierra 3500 6.6L Duramax LLY\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp\u003e\r\nFitment notes: Verify transmission model and valve body configuration before ordering. This is intended for Allison-equipped LB7 and LLY Duramax applications within the model years listed.\r\n\u003c\/p\u003e","brand":"SunCoast Converters","offers":[{"title":"Default Title","offer_id":57273834373493,"sku":"29533074","price":585.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/F198660901.jpg?v=1780954151"},{"product_id":"allison-b-trim-solenoid-lb7-lly-01-05-29533075","title":"ALLISON B TRIM SOLENOID LB7\/LLY 01-05","description":"\u003cp\u003e\u003c\/p\u003e\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eAllison B-Trim Pressure Control Solenoid\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cp\u003e\u003cstrong\u003ePart Number: 29533075\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\r\nThe Allison B-Trim Pressure Control Solenoid (29533075) is an OE-style replacement solenoid designed for 2001–2005 GM Duramax LB7 and LLY trucks equipped with Allison automatic transmissions. The B-Trim solenoid installs in the valve body and works in conjunction with the A-Trim solenoid to refine and smooth hydraulic pressure application during shifts.\r\n\u003c\/p\u003e\r\n\r\n\u003cp\u003e\r\nWhile the A-Trim solenoid manages primary pressure, the B-Trim solenoid is responsible for fine-tuning clutch apply rates and shift timing. Proper B-Trim function helps control how quickly and smoothly clutches apply, reducing shift flare, harsh transitions, and erratic shift behavior under changing load conditions.\r\n\u003c\/p\u003e\r\n\r\n\u003cp\u003e\r\nA worn or failing B-Trim solenoid can cause inconsistent shift timing, flare during gear changes, or harsh shifts even when overall line pressure appears normal. Replacing the B-Trim solenoid restores precise pressure modulation, improving drivability and ensuring predictable, repeatable shift quality during daily driving, towing, and higher-mileage operation.\r\n\u003c\/p\u003e\r\n\r\n\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eKey Features and Benefits\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003eOE-style replacement for Allison B-Trim pressure control function\u003c\/li\u003e\r\n  \u003cli\u003eFine-tunes clutch apply rates for smoother, more controlled shifts\u003c\/li\u003e\r\n  \u003cli\u003eHelps reduce shift flare and erratic shift timing\u003c\/li\u003e\r\n  \u003cli\u003eImproves overall shift consistency and drivability\u003c\/li\u003e\r\n  \u003cli\u003eDirect-fit valve body solenoid for service or rebuild work\u003c\/li\u003e\r\n  \u003cli\u003eRecommended replacement during valve body service or high-mileage repairs\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eCommon Symptoms of a Weak or Failed B-Trim Solenoid\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003eShift flare during upshifts\u003c\/li\u003e\r\n  \u003cli\u003eInconsistent or erratic shift timing\u003c\/li\u003e\r\n  \u003cli\u003eHarsh shifts not corrected by line pressure adjustments\u003c\/li\u003e\r\n  \u003cli\u003eGeneral drivability complaints related to shift quality\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch4\u003e\u003cspan style=\"color: #ff6600;\"\u003eApplications\u003c\/span\u003e\u003c\/h4\u003e\r\n\u003cul\u003e\r\n  \u003cli\u003e2001–2004 Chevrolet Silverado 2500HD 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2001–2004 Chevrolet Silverado 3500 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2001–2004 GMC Sierra 2500HD 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2001–2004 GMC Sierra 3500 6.6L Duramax LB7\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 Chevrolet Silverado 2500HD 6.6L Duramax LLY\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 Chevrolet Silverado 3500 6.6L Duramax LLY\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 GMC Sierra 2500HD 6.6L Duramax LLY\u003c\/li\u003e\r\n  \u003cli\u003e2004.5–2005 GMC Sierra 3500 6.6L Duramax LLY\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp\u003e\r\nFitment note: Proper operation of the B-Trim solenoid is critical for smooth clutch apply and shift refinement. For best results during valve body service, A-Trim and B-Trim solenoids are often replaced together.\r\n\u003c\/p\u003e","brand":"SunCoast Converters","offers":[{"title":"Default Title","offer_id":57273843253621,"sku":"29533075","price":585.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/F198660904.jpg?v=1780954152"},{"product_id":"bd-diesel-bd-torquemaster-chevy-allison-trans-converter-package-2004-5-2006-lly-4wd-1064724bm","title":"BD Diesel BD TorqueMaster Chevy Allison Trans \u0026 Converter Package 2004.5-2006 LLY 4WD - 1064724BM","description":"\u003cp\u003eWhen you purchase a BD transmission and torque converter package, you are getting a matched set that has been dyno tested together for ultimate performance, and reliability. Every transmission comes with BD's own Heavy Duty pan that adds extra fluid capacity. For towing, street or track, when it comes to a dependable transmission that will stand up to your diesel's power and torque demands, the clear choice is BD.\u003c\/p\u003e","brand":"BD Diesel","offers":[{"title":"Default Title","offer_id":57275893088629,"sku":"1064724BM","price":7001.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/1064724bm_1024px.jpg?v=1781021818"},{"product_id":"bd-diesel-bd-torquemaster-chevy-allison-trans-converter-package-2004-5-2006-lly-2wd-1064722bm","title":"BD Diesel BD TorqueMaster Chevy Allison Trans \u0026 Converter Package 2004.5-2006 LLY 2WD - 1064722BM","description":"\u003cp\u003eWhen you purchase a BD transmission and torque converter package, you are getting a matched set that has been dyno tested together for ultimate performance, and reliability. Every transmission comes with BD's own Heavy Duty pan that adds extra fluid capacity. For towing, street or track, when it comes to a dependable transmission that will stand up to your diesel's power and torque demands, the clear choice is BD.\u003c\/p\u003e","brand":"BD Diesel","offers":[{"title":"Default Title","offer_id":57275896824181,"sku":"1064722BM","price":6865.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/1064722bm_1024px.jpg?v=1781021843"},{"product_id":"bd-diesel-bd-towmaster-chevy-allison-trans-converter-package-2004-2006-lly-4wd-1064724ss","title":"BD Diesel BD TowMaster Chevy Allison Trans \u0026 Converter Package 2004-2006 LLY 4WD - 1064724SS","description":"\u003cp\u003eWhen you purchase a BD transmission and torque converter package, you are getting a matched set that has been dyno tested together for ultimate performance, and reliability. Every transmission comes with BD's own Heavy Duty pan that adds extra fluid capacity. For towing, street or track, when it comes to a dependable transmission that will stand up to your diesel's power and torque demands, the clear choice is BD.\u003c\/p\u003e","brand":"BD Diesel","offers":[{"title":"Default Title","offer_id":57275922252149,"sku":"1064724SS","price":5737.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/1064724ss_1024px.jpg?v=1781022000"},{"product_id":"bd-diesel-bd-towmaster-chevy-allison-transmission-2004-2006-lly-2wd-1064724","title":"BD Diesel BD TowMaster Chevy Allison Transmission 2004-2006 LLY 2WD - 1064724","description":"\u003cp\u003eThe stock transmission is designed to handle the output of the stock engine, but not much more. Increase the durability of your drivetrain with a BD transmission. All transmissions come with BD's heavy duty transmission pan.\u003c\/p\u003e","brand":"BD Diesel","offers":[{"title":"Default Title","offer_id":57275922547061,"sku":"1064724","price":4817.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/1064724_1024px.jpg?v=1781022003"},{"product_id":"bd-diesel-bd-towmaster-chevy-allison-trans-converter-package-2004-2006-lly-2wd-1064722ss","title":"BD Diesel BD TowMaster Chevy Allison Trans \u0026 Converter Package 2004-2006 LLY 2WD - 1064722SS","description":"\u003cp\u003eWhen you purchase a BD transmission and torque converter package, you are getting a matched set that has been dyno tested together for ultimate performance, and reliability. Every transmission comes with BD's own Heavy Duty pan that adds extra fluid capacity. For towing, street or track, when it comes to a dependable transmission that will stand up to your diesel's power and torque demands, the clear choice is BD.\u003c\/p\u003e","brand":"BD Diesel","offers":[{"title":"Default Title","offer_id":57275922973045,"sku":"1064722SS","price":5625.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/1064722ss_1024px.jpg?v=1781022006"},{"product_id":"fleece-performance-allison-transmission-cooler-lines-for-2006-2010-lbz-lmm-fpe-tl-lbz-lmm","title":"Fleece Performance - Allison Transmission Cooler Lines for 2006-2010 (LBZ-LMM) - FPE-TL-LBZ-LMM","description":"\u003cp\u003eReplace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. Our kit is the most complete replacement transmission line kit available for your LBZ or LMM truck! It includes all of the necessary fittings whether your truck is running a stock radiator or Setrab equipped radiator. Kit Contents: Transmission Lines (6) 7\/8\"-14 O-ring to -10AN fittings (2) M22x1.5 to -10AN Setrab fittings (2) Large OD washers (1) Double hose clamp (2) Locking cable ties\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":57281311670645,"sku":"FPE-TL-LBZ-LMM","price":289.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7656\/2037\/files\/FPE-TL-LBZ-LMM_01.jpg?v=1781168113"}],"url":"https:\/\/wickeddieselva.com\/collections\/duramax-2004-5-2005-6-6l-lly-transmission.oembed","provider":"Wicked Diesel VA","version":"1.0","type":"link"}