SUBJECT--LEAN SURGE CONDITION 1955 V-8 CHEVROLET
A lean surge condition, at speeds
ranging from 55-75 mph road load, has been reported on V-8 engines in the
field with both Powerglide and three-speed transmissions. This
condition will only be found where the Powerglide V-8 engine is equipped
with carburetor part No. 7005810 or where a three-speed transmission V-8
engine is equipped with carburetor part No. 7006825. The condition may be
corrected by replacing the venturi
cluster assembly and The main metering jets in the carburetors.
On Powerglide V-8 carburetors,
venturi cluster part No. 7007989 replaces cluster assembly No. 7000287 and
main metering jets (two) part No. 7002951 replace main jets part No.
7002952. On the three-speed transmission V-8 engine carburetor the venturi
cluster assembly part No. 7007990 replaces cluster assembly No. 7006844
and main metering jets (two) part No. 7002952 replace main jets part No.
Carburetor, part No. 7008004.
used on the Powerglide V-8 engine, and carburetor part No. 7008005,
used on the three-speed V-8 engine, have the new venturi cluster
assemblies and main metering jets and are not subject to- the lean surge
Policy: This modification is to be handled on a maintenance
(0467 PD 3-55)
(Printed in U. S. A.
AA, GO:9, WD, 131,