C4 and C6 Automatic Transmission Info
C4 History and Information
4. The factory C4 is capable of handling a higher output engine for a lighter weight car. We've had customers use our 350 HP / 302 with success. Substituting a higher stall speed converter or shift kit can improve it. These days aftermarket companies like TCI sell C4 Trannys that can handle loads over 450HP for a reasonable cost.
C6 Automatic Transmission
The C6 came out in 1966 and ended production in the mid 90's and was used in heavier cars and Trucks. The C6 has a good reputation for carrying big loads as well.
Transmission Pan ID
C4 pans have 11 bolts, are 10” by 9” can have a 1” or 2” deep sump.
Trucks and larger cars may have a pan with a threaded hole on the right side for the dipstick tube.
AOD’s ran from 1980 to 93. AOD pans have 14 bolts, are about 14.5” by 13” with a 2” depth. 4x4’s have a pan with a dropped center. AOD’s use a TV. (throttle valve) linkage on the left side that is hooked to the carburetor or throttle body with a cable or rod. It also uses a small round neutral switch above the TV. link which is screwed into the case. The AOD has a one piece alloy bellhousing and case.
C6’s made from 66 to 75 have pans with 17 bolts, are about 14” by 13.5” with 1” to 1.5” depth. 75+ models have pans about 1.75” to 2” deep. 4x4 pans are 3” deep in the center and have an extension tube on the filter. The C6 has a one piece bellhousing and case.
AODE/4R70W go from 92 to present. It’s pan is similar to the AOD. These trannies have a large neutral switch (sometimes called a MLPS) mounted to the manual linkage and has a hole covered by a rubber plug on the bellhousing’s bottom. 4x4 truck pans (and 76+ model cars and 2wd trucks) are dropped near the center. The
AODE/4R70W uses a one piece bellhousing and case. E4OD pans are 20.5” by 13.5” with 20 bolts. The E4OD was used from 89 to 98. The 4R100 normally has a pan drain plug a was used from 98 to present. These trannies have a one piece alloy bellhousing and case.
Engine Factory makes no claims to this articles facts and we're not experts in the field of Transmissions
Article Derived from BS Productions.
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