Reseals the valve body bores in the Range Rover Evoque and Discovery Sport nine-speed, restoring line pressure and curing flare shifts and leaks.
If a Range Rover Evoque or Discovery Sport running the ZF 9HP48 nine-speed automatic is flaring on the 2-3 or 4-5 shift, holding a gear too long, or weeping fluid from the valve body with no obvious mechanical damage inside, this is almost always a bore wear problem rather than a worn clutch or a bad solenoid. This sleeve kit replaces the hardened sealing sleeves in the valve body bores - the sleeves that supersede Land Rover part numbers LR123857, LR049901, LR086159 and LR123857LR - with heat-resistant polymer sleeves and precision-ground metal rings, restoring the bore clearances the original plastic sleeves lose as they shrink and harden with heat cycling.
The 9HP48 (948TE) is a nine-speed, front-wheel-drive electronic automatic shared across Land Rover, Jeep, Chrysler and Honda platforms, and its valve body is dense with small-diameter bores that have to hold tight clearances to keep line pressure and clutch-apply pressure where the transmission computer commands them. Sonnax documents two specific wear points inside this valve body family: the aluminum sleeve around the A and F dog clutch plunger valve wears from plunger movement until the circuit starts losing pressure, and the pressure regulator bore itself can oscillate and open up, letting critical pressure bleed out of the main line circuit. Either failure shows up as the same kind of symptom - pressure that cannot hold where it should - well before anything downstream of the valve body is actually damaged.
Because this is a sealing failure rather than a worn clutch or burnt band, a vacuum or pressure test at the valve body - not a pan-off visual inspection alone - is what actually confirms it. Sonnax's own service notes on the A/F dog clutch plunger and pressure regulator bores call for pulling the valve body, checking for visible wear or scoring on the bore and plunger surfaces, and vacuum-testing the ports if the sleeves do not show obvious damage. If your symptoms match but the bores test fine, look at the solenoids and the transmission control module before assuming the sleeves are the cause.
This kit supersedes Land Rover part numbers LR123857, LR049901, LR086159 and LR123857LR for the nine-speed automatic in the Range Rover Evoque and Discovery Sport. The ZF 9HP48 platform is also used in Jeep, Chrysler and Honda applications, but those use their own part numbering and in some cases different plunger valve diameters between Park-By-Wire and Park-By-Cable configurations, so this specific kit is confirmed for Land Rover applications only - match your superseded part number before ordering. We also stock a complete remanufactured valve body for this platform if your bores turn out to be too far gone to reseal.
This is bench work: pull the pan and valve body off the vehicle, press the old sleeves out of their bores, and clean the bore walls completely so no hardened plastic debris is left to migrate into the new sleeves. Lubricate the new sleeves and O-rings before pressing them in square and fully seated - a sleeve that sits cocked or proud will leak worse than the one it replaced. Torque the valve body bolts to spec, refill with the correct ZF-spec fluid, and set the level at the factory fill temperature rather than cold. Change the filter and pan gasket in the same visit, and if your original diagnosis also flagged output shaft wear, our output shaft sleeve kit addresses that separately. If the valve body also needs new solenoids rather than just resealed bores, see our 10-piece solenoid kit, or step up to a complete remanufactured valve body if the bores are too worn to reseal.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The original sealing sleeves in the valve body bores are plastic and harden and shrink with heat cycling. Sonnax documents the same wear pattern in the A/F dog clutch plunger sleeve and the pressure regulator bore - both lose sealing clearance and bleed off line pressure.
It supersedes LR123857, LR049901, LR086159 and LR123857LR.
This kit is confirmed for the Land Rover Evoque and Discovery Sport application only. The Jeep, Chrysler and Honda versions of the 9HP48 use different part numbers, and in some configurations different plunger valve diameters, so do not assume cross-fitment.
A worn sleeve bore is a common cause of exactly that kind of code. If a vacuum or pressure test at the valve body confirms bore wear with no other mechanical damage, this kit restores the correct clearance without replacing the whole valve body.
The kit contains the sealing sleeves, matching O-rings and assembly lubricant. The valve body itself, the filter, and the pan gasket are not included and should be sourced separately.
Refill with ZF Lifeguard 9 or the Mopar-equivalent 9-speed ATF spec, and set the fluid level at the factory fill temperature rather than cold, since level checked cold will read incorrectly on this transmission.
