April 21, 2021
Symptoms:
- Code P0218
- Code P0741
- Overheated converter
- Inadequate lubrication
- Excess converter pressure
- High TCC slip RPM
Cause:
Converter feed limit bore wear or stuck converter feed limit valve can result in overheat, incorrect TCC apply/release, inadequate lube and cooling and other problems.Correction:
Recover hydraulic control and renew TCC and lube performance by installing the Sonnax drop-in converter feed limit valve kit.8L45,8L90
Converter Feed Limit Valve Kit
Part No.154740-19K
-
Requires:
- 154740-TL22(Recommended)
You need this if... View Instructions Find a Distributor
GM 8L45 and 8L90 units may have TCC apply and release problems. Bore wear or a stuck converter feed limit valve can result in converter overheat, incorrect TCC apply or release, inadequate lube and cooling and converter over-pressurization. Installing Sonnax drop-in converter feed limit valve kit 154740-19K will restore proper valve function, resulting in proper TCC apply and release, regaining control of lube and cooling.
- Hardcoat anodized aluminum valve combats premature wear
- Annular groove helps center the valve in sleeve
- Sleeve adds valve support to resist wear
- Drop-in Zip Valve™parts install quickly and easily
OE vacuum testing at the inboard spool requires converter feed limit vacuum test tool154740-TL22.
- Sleeve
- Valve
- Spring
You need this if...
Inboard Location:Install Sonnax converter feed limit vacuum test tool [154740-TL22] with vacuum testing tube attached to long end (Figure 3). Vacuum should hold a minimum of 18 in-Hg (Figures 1 & 3).
Outboard Location:Insert either the OE valve or Sonnax converter feed limit vacuum test tool [154740-TL22] centered in the port (Figure 2). Vacuum at indicated port should hold a minimum of 15 in-Hg (Figures 1, 2 & 3).
