This is part 1 of a 4L65-E Transmission Rebuild.
*4L65E Transmission Disassembly*
4L65E Transmission Disassembly and Rebuild Part 1
*Description:*
This video, hosted by Hiram, documents the tear-down of a 4L65E transmission from a 2005 Pontiac GTO. It's part one of a rebuild series, providing a guide with commentary on common issues and techniques. The customer provided many of the new parts for this rebuild.
*Key Themes:*
*Detailed Disassembly:* The video meticulously shows the disassembly process, identifying each part.
*Part Condition:* Hiram assesses each part, noting wear or damage, and identifying failure points. The transmission is in good condition overall, suggesting it was not driven hard.
*4L65E vs. 4L60E:* Comparisons are drawn between the 4L65E and 4L60E, noting differences such as the 7-friction 3-4 clutch.
*Customer Parts:* The customer supplied new parts, allowing for commentary on quality and upgrades.
*Proper Installation:* Correct tools and techniques are emphasized, such as proper o-ring placement.
*Common Issues:* Common 4L65E problems are mentioned, like 3-4 clutch failure, sunshell failure and babbit bushing issues.
*Most Important Ideas and Facts:*
*Transmission:* The transmission is a 4L65E from a 2005 Pontiac GTO, similar to those in Denalis and Hummers.
*Specific Parts:*
*Band:* The band has cracks but is not severely burnt; an extra-wide band is used in the rebuild.
*Clutches:* The 3-4 clutches are springy and worn; forward clutches are burned; the 4L65E has a 7-friction setup.
*Drum:* The drum is in good shape.
*Pistons:* The low-reverse piston is removed; the forward clutch piston is an updated design.
*Bushings:* Babbit bushings are a weak point, being replaced with steel-backed bushings.
*Input Sprag:* The original sprag is a single-cage design.
*Sunchill:* The sunchill is a known failure point.
*Valve Body:* The valve body has 7 checkballs and some junk/stickiness.
*Filter:* The filter has a "fold" important for proper fit.
*Upgrades:*
Blue racing clutches are used.
An extra-wide band is being installed.
A Corvette servo and updated forward clutch piston are used.
An upgraded double cage input sprag was supplied by the customer.
*Tools:* Snap ring pliers, 10mm socket, Torx Plus 50 socket, blow gun, and impact wrench are used. Parts are guided out to prevent damage; air is used to dislodge pistons.
*Fluid Path:* The oring between the input and output shaft is crucial.
*Springs:* Computer calibration around the accumulator springs is noted.
*Potential Issues:*
*Mis-installations:* Transmissions are often received due to mis-installations.
*Electronic Issues:* Electronic problems can be misdiagnosed as transmission issues.
*Reusing Components:* Some parts can be reused if there is no visible wear, but babbit bushings should not be reused.
*Torque Converter:* Correct torque converter installation is important.
*Missing Check Ball:* One of seven checkballs was missing and found later.
*Kit:* The rebuild kit was open when received.
*Aftermarket Filter:* A metal filter is incompatible with this transmission.
*Dipstick Stop:* The dipstick stop must be installed to ensure proper fluid level.
*Conclusion:*
This video provides a detailed look into the 4L65E, offering valuable information for rebuilders. Hiram’s approach and comparisons with the 4L60E enhance the educational value. Customer-provided parts and upgrade discussions add practical value.
4L65E, Transmission, Rebuild, Disassembly, Pontiac GTO, Auto Repair, Transmission Repair, Hiram, Automotive, DIY, Upgrade, Performance, Sonnax, Torque Converter, Valve Body, Bushings, Clutches, Transmission Band, Input Sprag, Sun Shell, Corvette Servo, Transmission Filter, #4L65E #TransmissionRebuild #AutoRepair #DIYAuto #PontiacGTO #TransmissionDisassembly
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