- Warning and suitability
- Replacing an internal transmission output shaft is an advanced, high-risk job that requires removing the transaxle, disassembly, and precise reassembly. If you have only basic tools and no transmission experience, strongly consider a professional or a reman/replacement transmission. Attempting this without proper tools/knowledge can cause injury and render the vehicle inoperable.
- Safety gear (must-have)
- Safety glasses — protect eyes from fluid/metal shards.
- Mechanic gloves — protect hands and improve grip.
- Steel-toe boots (recommended) — protect feet from heavy parts.
- Shop rags / absorbent pads — control spills.
- Fire extinguisher nearby — in case of fluid fires.
- General prerequisites
- Clear, level workspace with good lighting.
- Full vehicle service manual for your exact year-model Kia Carnival / Sedona (procedures, torque specs, fluid type/volume). Manuals provide exact bolt locations, torque values, and exploded diagrams — essential.
- At least one experienced helper for heavy lifting and alignment (recommended).
- Tools you should have (detailed descriptions and how to use)
- Good-quality socket set (metric 8–24 mm, deep and shallow sockets)
- Use with ratchet to remove bolts. Deep sockets reach recessed nuts; use breaker bar for stubborn bolts.
- Ratchets and breaker bar
- Ratchet for normal removal; breaker bar for initial high-torque loosening.
- Torque wrench (in-lb/Nm and ft-lb ranges covering typical transaxle bolts)
- Essential to torque bolts to spec during reassembly to prevent leaks/failures. Set required torque and tighten slowly.
- Floor jack (2-ton minimum) and quality jack stands (pair)
- Jack lifts vehicle; jack stands support it securely. Never work under a vehicle supported only by a jack.
- Transmission jack or a second floor jack with wide board and helper
- Supports heavy transmission during removal/installation; prevents dropping and injury.
- Pry bars (various lengths)
- Used to separate transmission from engine bellhousing gently; avoid prying on cast surfaces that can be damaged.
- Screwdrivers (flat and Phillips)
- For clips, small fasteners, and prying trim pieces.
- Pliers set (needle-nose, slip-joint)
- For clamps, retaining clips and hoses.
- Snap ring / circlip pliers (internal and external)
- Required to remove/install snap rings that retain shafts and bearings inside the trans. Using the wrong tool will damage rings or parts.
- Bearing puller / gear puller (3-jaw preferred)
- Pulls bearings or gears from shafts without damaging the parts. Essential if bearings are pressed on.
- Press or arbor press (or strong bench vise with adapters)
- Needed to press bearings and gears on/off shafts and to press the new output shaft in squarely. Manual pressing avoids damage.
- Seal driver set or suitable-size sockets/mallet with wood block
- Installs oil seals evenly without deforming them; improper installation causes leaks.
- Drift punches and soft-faced mallet
- For tapping bearings, seals, pins gently without marring surfaces.
- Drain pan and fluid pump
- To catch and remove transmission fluid and to refill after assembly.
- Torque-angle gauge (if manual calls for angle torque)
- Some bolts require angle tightening; this tool ensures accuracy.
- Magnetic pickup / flashlight and parts trays
- Prevent loss of small bolts/parts.
- Gasket scraper and cleaning solvent
- Clean mating surfaces before reassembly.
- Thread locker (medium strength) and anti-seize (where specified)
- For bolt reassembly where manual specifies.
- Optional but highly recommended: service manual-specified special tools (e.g., trans input/output shaft holder, spline puller, snap ring pliers sized for your trans) — these are required for safe/accurate work if the trans uses proprietary fasteners or retention systems. Manufacturer specials avoid damage.
- Why extra/special tools are required
- Transmission internals are pressed and fitted to tight tolerances; pullers, presses, and snap ring pliers remove/install parts without damage.
- A transmission jack prevents sudden drops of heavy, awkward transmissions and aligns the unit for safe bolt-up.
- Torque wrench and service-manual values prevent under- or over-tightening which causes leaks or catastrophic failures.
- Special OEM tools (if listed in manual) are designed to hold shafts, align bearings, or set endplay; without them, you risk misassembly and immediate failure.
- Parts typically required (what to replace and why)
- Replacement output shaft (if available separately)
- Reason: worn or damaged splines, scoring, or twisted shaft needs replacement. On many transaxles this part may not be sold separately; a remanufactured output assembly or entire transmission may be required.
- Output shaft bearings (front/rear bearings)
- Reason: bearings wear and are cheap relative to labor — always replace when shaft is out to avoid premature failure.
- Output shaft seal(s) and gasket(s)
- Reason: seals will be disturbed; replace to prevent leaks.
- Snap rings / circlips (if deformed)
- Reason: reuse can risk failure; replace if any deformation is present.
- Transmission fluid (type and capacity per manual)
- Reason: fluid is drained during service and must be replaced with correct spec.
- Any damaged gears, bushings, or synchros found on inspection
- Reason: internal damage often accompanies shaft failure; inspect and replace as necessary.
- Fasteners (bolts/studs) if stretched/damaged
- Reason: many bolts are torque-to-yield or corroded; replace to ensure proper clamping.
- Consider replacement of entire transmission or buying a remanufactured unit if the output shaft is not sold separately or if internal damage is extensive.
- High-level step sequence (bulleted overview — follow service manual for exact order and torque specs)
- Prepare vehicle: disconnect negative battery terminal.
- Raise vehicle safely on level ground; support with jack stands.
- Remove engine undertray, splash shields, and any trim blocking access.
- Drain transmission fluid into a drain pan.
- Remove driveshafts / CV axles or half-shafts per manual (for FWD transaxles you usually remove half-shafts from hub and slide out of trans).
- Disconnect electrical connectors, speedometer drive, shift linkage, and any cooler lines (plug lines to avoid contamination).
- Support engine/transmission if required by engine mount removal or to prevent sagging when trans is removed.
- Remove starter motor if it blocks bellhousing access.
- Unbolt torque converter bolts from flexplate (automatic) and/or separate torque converter from trans per manual.
- Remove transmission mount and crossmember bolts.
- Use transmission jack to support transmission; unbolt bellhousing bolts; carefully separate transmission from engine. Use pry bars sparingly, follow alignment dowels and hooks.
- Lower transmission off engine and move to a clean bench or work area.
- Secure transmission in a gearbox stand or clamped in a bench vise padded to prevent damage.
- Remove tail housing/extension housing (if present) to access output shaft assembly.
- Drain any remaining fluid and remove retaining snap rings, bearing retainer plate, and remove bearings using snap ring pliers and puller.
- Use puller/press to remove the existing output shaft assembly carefully; note orientation, shims, and spacer thicknesses for correct reassembly.
- Inspect all mating gears, splines, and bores for wear. Replace damaged components.
- Install new or refurbished output shaft: use press to press bearings and shaft to correct depth, install any shims, snap rings, and seals using seal driver. Verify endplay/axial clearance per manual using feeler gauge or dial indicator.
- Reinstall tail housing, torque to manual specs, replace any gaskets/seals.
- Reinstall transmission to vehicle using transmission jack; align dowels and torque bellhousing bolts to spec.
- Reattach torque converter to flexplate/drive; torque bolts per manual; reinstall starter.
- Reinstall half-shafts/CV axles, reconnect linkage, electrical connectors, and cooler lines.
- Reinstall crossmember and transmission mounts; lower vehicle.
- Refill with correct type and amount of transmission fluid.
- Start engine, cycle through gears with brake applied to circulate fluid; check for leaks and proper operation.
- Road test gently, recheck fluid level and bolts after short run.
- Important measurements and reassembly checks (do not skip)
- Endplay/axial clearance of output shaft — measured with a dial indicator or feeler gauge; incorrect endplay causes noise and premature wear.
- Bearing preload where applicable — manual will specify method (torque/tightening sequence).
- Torque values of all fasteners — use torque wrench and follow manual.
- Proper seating of seals and snap rings — improperly seated components cause leaks and catastrophic failures.
- Common complications and their implications
- Output shaft not sold separately or hard to source — you may need a remanufactured transmission or output assembly; replacing the entire transmission is often easier and safer for a beginner.
- Damaged gears or synchronizers found during disassembly — increases parts cost and complexity; consider professional rebuild.
- Special tools required (bearing preload tool, shaft holder, alignment tools) — without them you cannot accurately set clearances and may cause rework or failure.
- When to choose replacement transmission instead of replacing shaft
- Output shaft is internally fitted/press-fit with integral gears and not available separately.
- Multiple internal components are damaged.
- You lack access to a press and proper measuring tools.
- Labor and downtime make a remanufactured/rebuilt transmission more cost-effective.
- A reman unit comes with warranty and reduces risk compared to DIY internal repairs.
- Final notes
- If you proceed, acquire the exact service manual and parts diagrams for your Kia’s year and transmission code; follow torque specs and measurement procedures exactly.
- If any step (bearing press, endplay setting, or trans lifting) is unfamiliar, stop and consult a trained transmission tech. Mistakes can be costly and dangerous.
- Quick parts checklist to buy before starting (verify with manual)
- Output shaft or reman output assembly (if available)
- Output shaft bearings
- Output shaft seals and gaskets
- Snap rings / circlips
- Transmission fluid (correct spec)
- Replacement bolts/studs if needed
- Repair or rebuild kit if available for your transmission model
(End of instructions — follow the factory service manual exactly; if you are unsure at any step, have the work performed by a qualified technician.) rteeqp73
2005 kia sedona rims 18 preciosa
2015-2018 kia Sedona trailer wiring kit Made this video to help you install the trailer wiring kit for your sedona. But please look online for instructions before trying to ...
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