- Safety first (read and follow before you start)
- Wear safety glasses, mechanic gloves, and protective clothing.
- Work on a flat, level surface; use quality jack stands, never rely on a jack alone.
- Disconnect the negative battery cable before working on the transmission.
- Have a fire extinguisher nearby and keep rags/cleaners away from hot parts.
- If anything feels unclear or binds during reassembly, stop — incorrect assembly can permanently damage the transmission or cause a vehicle hazard.

- Overview of what you’re doing and why
- You will remove the transmission pan, drop the valve body (partially or fully), remove and replace the specific coil spring(s) in the valve body, replace the filter and pan gasket, then reassemble and refill with the correct fluid.
- Springs in the valve body control hydraulic circuits and shift timing/pressure; a weak, broken, or missing spring causes hard shifts, slipping, or gear selection problems.
- Often you should replace the transmission filter, pan gasket, and any small valve-body seals/check balls when servicing springs because contamination and wear commonly coexist.

- Parts you will likely need (get OEM or a quality rebuild kit for 42RLE)
- Valve-body spring(s) or a valve-body repair kit specific to 42RLE (coil spring(s) for the valve/accumulator you’re replacing).
- Transmission filter (approved for 42RLE) and pan gasket (or RTV if the gasket type used).
- Replacement check balls and any small valve seals if the kit lists them.
- Transmission fluid (correct spec for Jeep 42RLE — use factory-recommended ATF, quantity ~6–8 quarts depending on drain method; check Jeep manual).
- Optional: new pan bolts if corroded, and torque-to-yield bolts replaced as required.
- Why: Springs weaken or break, and filter/gasket replacement prevents contamination and ensures reassembly seals properly.

- Essential tools (each tool described and how to use it)
- Floor/garage jack
- Description: hydraulic lift to raise the vehicle.
- Use: raise vehicle to working height then lower onto jack stands. Never use jack alone.
- Jack stands (pair, rated for your vehicle)
- Description: adjustable, load-rated stands to safely support the vehicle.
- Use: set on solid points on the frame; lower vehicle onto stands for safe access undercarriage.
- Wheel chocks
- Description: wedges placed behind wheels to prevent rolling.
- Use: place behind rear wheels when working on front or vice versa.
- Drain pan
- Description: shallow metal/plastic container to catch fluid.
- Use: position under transmission pan to catch drained ATF.
- Metric socket set (3/8" drive and 1/4" drive), including deep and shallow sockets
- Description: set of sockets and matching ratchets.
- Use: remove pan bolts, valve-body bolts, and other fasteners. Keep a magnetic tray for bolts.
- Torque wrench (click-type, 0–100 ft·lb range)
- Description: calibrated wrench for tightening bolts to specified torque.
- Use: tighten valve-body and pan bolts to OEM torque specs. Essential to avoid leaks or stripped bolts.
- Combination wrench set (metric)
- Description: open- and box-end wrenches.
- Use: reach bolts in tight places when sockets won’t fit.
- Screwdrivers and small picks (flat and Phillips; small hook/needle picks)
- Description: screwdrivers, and picks for removing small retaining clips and springs.
- Use: carefully remove clips, pry gaskets, and manipulate small components.
- Snap-ring / circlip pliers
- Description: pliers sized to remove snap rings.
- Use: used if the spring/retainer is held with a snap ring.
- Small magnet on stick and magnetic parts tray
- Description: extendable magnet and tray to keep bolts and check balls.
- Use: retrieve and organize small metal parts that fall into the pan or bores.
- Pick-up tool / flexible pick
- Description: for grabbing small springs/balls from tight bores.
- Use: extract check balls and springs safely.
- Clean shop rags and brake parts cleaner or ATF-safe solvent
- Description: cleaning materials for the valve body and pan.
- Use: thoroughly clean valve-body surfaces and passages before reassembly.
- Plastic/nylon-tipped mallet (optional)
- Description: soft hammer to persuade parts without damaging them.
- Use: gentle taps to seat or align parts.
- Transmission jack or large floor jack and block of wood (recommended)
- Description: transmission jack supports and lowers the transmission if full separation is needed.
- Use: support the transmission if you must drop it for access. Recommended for safety and control.
- Service manual or OEM repair manual for 42RLE (digital or paper)
- Description: contains bolt torque specs, disassembly order, diagrams, spring locations, and fluid specs.
- Use: follow OEM torque values and diagrams exactly—critical.

- Recommended but not strictly mandatory tools
- Impact driver (low torque) — speeds removal of bolts but not required.
- Bench vise with soft jaws — to hold small parts while working.
- Calibrated dial indicator or pressure gauge (for advanced diagnosis) — to test valve movement or line pressure if you want to confirm repair.

- Preparation steps (before you touch the pan)
- Park on level area, chock wheels, disconnect battery.
- Lift vehicle with jack, place on jack stands, ensure secure.
- Place drain pan under transmission pan.
- Remove any skid plates, exhaust heat shields, or components blocking pan access.
- Loosen pan bolts evenly but do not remove them until ready to drain; be prepared for fluid.

- Valve-body coil spring replacement procedure (general, for 42RLE; follow OEM manual for exact spring location and torque specs)
- Drain the fluid from the pan by loosening the pan bolts; remove bolts starting at the corners and allow fluid to drain into the pan.
- Remove the transmission pan and set aside; inspect for metal shavings—significant metal indicates larger problems.
- Remove the transmission filter by pulling straight down (some filters are sealed by bolts—remove as required). Be prepared for more fluid to drain.
- Clean the pan and valve-body mating surfaces; collect and keep all bolts and check balls in a magnetic tray and organized layout (create a map/photo of bolt patterns).
- Identify the coil spring location on the valve body. Consult the 42RLE valve-body diagram in the service manual to confirm which spring you’re replacing and whether any retaining clips or check balls are involved.
- Remove any retaining plates, clips, or bolts that hold the valve body/retainer. Support the valve body as you remove hardware — it may be heavy or have springs under tension.
- Carefully lift the valve body enough to access the spring. If a spring is in a bore with a check ball, use a magnet/pick to remove the check ball first and set it aside in order.
- Use picks to compress and remove the old coil spring and any associated retainer. Note orientation and stack of parts; take photos for reassembly reference.
- Inspect valve bores, spool valves, and passages for wear or contamination. Clean with solvent and compressed air if available (blow from the valve side into the passage, not the opposite direction). Replace any worn valves or damaged components.
- Install new coil spring in exact orientation as the original. Install any retainer, check ball, or plate in the same sequence and orientation you removed them. Use picks and magnetic pickup to place small parts—do not force parts.
- Re-seat the valve body against the transmission case. Install bolts finger-tight in the correct sequence. Torque all valve-body bolts to the OEM specification using a torque wrench (consult the 42RLE manual for proper torque and bolt sequence).
- Replace the transmission filter with a new one. Replace pan gasket or apply RTV/adhesive per gasket type and OEM instructions.
- Clean the pan, install new gasket and reattach pan with bolts tightened to the specified torque in a crisscross pattern.
- Reinstall any removed components (skid plates, exhaust if removed), reconnect battery.

- Fluid refill and test
- Refill with the correct ATF to the specified level through the dipstick tube. Use funnel and clean fluid.
- Start engine, let it warm up to operating temperature; cycle shifter through all gear positions with foot on the brake to circulate fluid.
- With engine idling and transmission at operating temp, check fluid level and top to the correct mark. Check for leaks.
- Road test gently to confirm shifts are smooth; check for leaks and recheck fluid level after short test drive.

- Why extra tools (transmission jack, torque wrench, service manual) are required
- Transmission jack: If the work requires dropping the transmission or supporting it while removing valve-body hardware, a transmission jack prevents dangerous drops and makes alignment safe. Loose heavy components can fall and injure you or damage parts.
- Torque wrench: Valve-body and pan bolts need specific torque values. Over- or under-tightening causes leaks, stripped threads, or cracked valve body/case. A torque wrench ensures correct clamping load.
- Service manual: Valve-body layouts, spring positions, bolt torque sequences, and fluid specs are model-specific. Using the manual reduces risk of incorrect assembly and costly damage.

- When a simple spring swap is NOT enough — signs you need more parts or a rebuild
- Large metal shavings in the pan or the filter suggests internal damage — major parts (clutches, drums, pump) may require rebuild or replacement.
- Worn valve bores or damaged valve spools will let fluid bypass; these typically require valve body machining or replacement.
- If multiple springs or check balls are damaged or missing, purchase a full valve-body repair kit or rebuilt valve body.
- Persistent erratic shifting or loss of pressure after spring replacement may indicate solenoid failure, torque converter issues, or internal clutch/friction wear — these require additional parts.

- Final tips (practical, beginner-friendly)
- Work methodically: organize bolts and parts by location; take photos at every step.
- Replace the filter and gasket every time you open the pan — cost is small, and cleanliness matters.
- Buy a repair kit specific to the 42RLE — it will include the correct springs, check balls, and seals.
- If you do not have a torque wrench or service manual, do not guess torque values — borrow or buy the tools or have a shop perform the job.
- Consider having a shop press or test the valve body if you suspect serious valve bores wear — some checks require bench testing.

- Common replacement part suggestions (generic names; match to exact vehicle year/engine)
- 42RLE valve-body spring kit or valve-body repair kit (contains the coil spring(s) and related parts).
- OEM transmission filter for 42RLE.
- Pan gasket or pan gasket set and pan bolts if corroded.
- Approved ATF suitable for the 42RLE (consult Jeep/Mopar spec).
- If valve body is badly damaged, consider a remanufactured 42RLE valve body assembly.

- Closing practical safety note
- This is a safety- and skill-sensitive repair. If you feel unsure at any step or find unexpected damage, stop and consult a transmission specialist.
rteeqp73

What Gear is Your Jeep In? There's a feature most new Jeep Wrangler and Gladiator owners don't know about. If you have an automatic transmission and you ...

What Gear is Your Jeep In? There's a feature most new Jeep Wrangler and Gladiator owners don't know about. If you have an automatic transmission and you ...

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