GM 4L60, 4L60/65/70-E Extra Wide Intermediate Band
Ideal for 4×4, heavy-duty and commercial use in GM 4L60 and 4L60/65/70-E units, Sonnax drop-in extra-wide intermediate band (p/n 77700-01K) is the ONLY wide band available that features OEM style high-energy material, according to the company. It’s 15% wider than the OE band, provides 15% more holding capacity, and features a 60% thicker case anchor
GM 4L70E Leaking out of Vent
Complaint: After overhaul, a 4L70E has a complaint of transmission fluid leaking from the transmission vent. There were no cooler restrictions or filter problems and there was no evidence of cavitation. Cause: The input speed sensor passage and the vent passage in the pump can be connected as shown in figure 1. The rebuild technician
GM 4L60/65/70-E AX Code Accumulator Valve Sleeve
Recover hydraulic control and renew shift operation in GM 4L60/65/70-E transmissions with the new Sonnax drop-in AX code accumulator valve sleeve (p/n 77754-61). Features include: direct replacement sleeve replaces OE sleeves with “AX” code only; renews accumulator action and quells leaks; and the drop-in Zip Valve installs quickly and easily.
4L60E/65E/70E Input Carrier Change
The input carrier and the reaction carrier shaft were modified to accommodate the updated bearing.
GM 4L70-E ISS DTC P0716 or P0717
Find diagnostic and building tips in Transmission Digest’s Tech/Talk quarterly bulletin – October ’20
