Product Description
4L60E 4L65E 4L70E Isolator Sleeve Kit
Sonnax Part Number: 77754-ISO
Tooling Required! Tool #'s F-77754-TL4, VB-FIX
Severe wear of the TCC regulator valve bore from the OE valve allows regulated converter apply pressure to exhaust. This is a primary cause for a TCC-related 1870 slip code and overheated converters. Exhausting apply pressure also diminishes line pressure, which results in burnt clutches. Excessive wear at the isolator valve bore reduces TCC apply pressure. The Sonnax isolator sleeve kit 77754-ISO in combination with Sonnax TCC regulator valve kit 77754-03K or 77754-04K allows you to restore hydraulic integrity of the apply circuit. Sleeve is manufactured from highly wear-resistant aluminum to provide full support for the valve and prevent side loading.
Symptoms:
- Code 894, 1870
- TCC cycling
- TCC slip
- 3-4 Clutch failure
Cause:
Severe wear of the TCC regulator bore allows regulated converter apply pressure to exhaust, while wear at the isolator valve bore reduces TCC apply pressure.
Correction:
This isolator sleeve kit combined with Sonnax TCC regulator valve kit helps restore normal TCC operation.
- Retaining Ring
- Sleeve
