Valves Archives - Transmission Digest
TransGo releases Allison valve body kit

TransGo has introduced a new performance reprogramming valve body kit for the Allison LCT 1000, model years 2011-2019. According to the company, the kit includes pump and valve body components to provide maximum holding capacity in all clutch packs and lockup—stock or tuned. The company says they engineered it work work trucks and performance applications.

Sonnax introduces Ford 6R140 converter limit valve kit

Sonnax has introduced a new drop-in converter limit valve kit for Ford 2011 and later 6R140 transmissions. Sonnax says this kit can help users recover hydraulic control and renew TCC performance in these transmissions. This kit (part no. 126740-25K) features a drop-in sleeve/valve assembly to compensate for wear and excess clearance, including in worn bores.

TransGo introduces new valve body repair kit for GM 8L series

TransGo has introduced a new valve body repair kit for GM 8L45 and 8L90 transmissions, model years 2015 and on. According to the company, the kit includes: a drop-in PR and shuttle valve line-up; a drop-in TCC regulator valve; drop-in S2, S3 and S4 regulator valves; an oversize converter feed limit valve; and an oversize

Sonnax unveils valve kits for ten-speed Ford, GM transmissions

Sonnax highlights its valve kits for Ford and GM ten-speed transmissions. The first of these is a line of oversized main pressure regulator valve kits #105740-20K (pictured above) for GM 10L60/80/90 (Gen. 1) and Ford 10R60/80/90/140 transmissions and #105740-21K for GM 10L60/80/90 (Gen. 2) transmissions. The company says these kits can recover hydraulic control and

Sonnax releases boost valve kits for Toyota transmissions

Sonnax has released new drop-in C1 and C4 apply boost valve kits (part numbers 168740-01K and #168740-02K, respectively) for Toyota’s UA80E, UA80F, UB80E and UB80F transmissions. The sleeves in these kits are manufactured from wear-resistant billet aluminum. Sonnax says these kits can prevent wear and restore proper hydraulic control in these Toyota/Lexus transmissions.

Dynamics of transmission fluid hydraulics and shifting

To understand why using the correct transmission fluid is necessary, you first have to know how the transmission fluid flows inside an automatic transmission.  Fluid paths The journey starts in the pan. The transmission fluid is drawn from the pan through a filter by the pump that is behind the torque converter. The fluid level

Sonnax highlights oversized low overrun valve kit

Sonnax highlights its oversized low overrun valve kit #77754-62K, which the company says can restore hydraulic integrity of the low/reverse clutch circuit and salvage worn valve bodies in GM 4L60-E, 4L65-E and 4L70-E transmissions if installed after reconditioning the bore. This kit requires Sonnax tool kit F-77754-TL62 for installation.

Sonnax highlights main pressure regulator valve kit

Sonnax highlights its main pressure regulator valve kit #105740-12K, which the company says can eliminate low line pressure, delayed engagement, poor shift quality, burnt clutches and various shift concerns in GM 10L80 (Gen. 1) and Ford 10R80/10R140 transmissions. Sonnax says this kit includes advanced design features like an extended outboard spool that is 270% longer

Honda Ridgeline bind up in reverse, forward in neutral

The complaint A 2006 Honda Ridgeline equipped with the BJFA Transmission has a complaint of a bind up in reverse and moves forward in neutral after overhaul. The truck would roll freely with the engine off and the transmission in neutral. Since this complaint occurred after overhaul, the technician thought that a clutch was mechanically