My 68 Polara wagon sports a 1970 383 HP out of a Cuda. The engine is fine but the 727 wasn’t touched. I am trying to research a replacement tc and flex plate to replace the original. Looking for suggestions more on the budget side but with another stall. I see advance and autozone list a 2200-2400 stall when looking in up under the cuda. It’s an 11” converter with 10” bolt circle. Has anyone used the TC part number 762 with success?
Torque Converter / Flex Plate Suggestions
- Thread starter Moparbo
- Start date
Vaanth
Active Member
I am not familiar with TC Remanufacturing, nor their number 762 converter. However, the pictured product listing shows the transmission application as A904. The A904 transmission was never used behind a 383, nor any big block. The A904 was available behind six cylinders and small block V-8s, except 340. It can be adapted to others, sometimes for racing, but was not factory installed. Its torque converter does not fit in the A727 transmissions used with big blocks, including 383, and the 340.
Looking at the manufacturer website, it shows numerous application errors. They list the 762 converter and A904 behind everything from a 170 to a 440, "with a A904".
The listed 762 specifications show a 27 tooth spline count which indicates the A904 transmission. Someone, somewhere within the company might know how to rebuild a converter, but their specifications/application information and presentation is poor.
If your factory 1970 383 high performance has its original transmission and converter, it already has an excellent street converter for a stock or a mildly built high performance engine. Although several parameters relate to true stall, Chrysler rated this converter at 2350 - 2650 RPM stall speed behind the 383 high performance engine in 1970. This converter, part number 2801764, is 10-3/4" (aka 11"), with the smaller flexplate, Chrysler part number 2400885. This converter was also used with the 340. The flex plate is used with A727 10-3/4" converters and A904 converters (which are also 10-3/4"), except the slant six which is the same size but has a different crankshaft bolt pattern.
If your 1968 Polara has its original transmission and torque converter and was originally a 383 two barrel, 383 four barrel standard, or 440 standard engine, it was originally equipped with an 11-3/4" (aka 12") converter, and the larger flex plate. The 2801764, or equivalent, converter and matching flexplate is a good upgrade.
I would likely avoid this company, but after digging into their relatively poor website, they do list a more correct converter for the application, part number 359. Likely it is not a true equivalent to 2801764, but is a generic 10-3/4" replacement. Details about external or internal balanced engine, etc. is missing. The picture actually shows an 11-3/4" (aka 12") converter albeit with a drain plug and no balance weight implying an internal balance engine and non-lock-up. Proceed with caution....
I do little with aftermarket converters, but I have used a few in the past, including Fairbanks, Turbo Action, and PTC. I use stock converters in my vehicles, usually the 2801764 or equivalent. I haven't needed to buy a converter in a long time, but my choice for rebuilt units, which was built well and inexpensive, was Dacco. Dacco seems to have faded away, but what remains looks to be part of Precision of New Hampton now. I have not used this company, but would consider it if looking for a rebuilt stock converter due to their Dacco tie-in.
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Thank you for the detailed insight! The picture I sent was incorrect. I know it has the 727 and I snapped the first pic that came up. Here is the corrected one. As far as the transmission goes, it is the stock unit for the station wagon, not the one from the cuda.
Vaanth
Active Member
The 764 looks more appropriate:
The specifications and application listed at their website is better too. They do need to work on the 762 listing.
For a flex plate, the smaller 8-cylinder unit with a 10" bolt circle, and mounting lug holes for 5/16" bolts is required. The original Chrysler number is 2400885 which supersedes to 4058429. There are several aftermarket sources, but ATP Z-196 is a good replacement and likely available through one of the mentioned retailers.
Unless damaged, your flex plate to crankshaft bolts and flex plate to torque converter bolts can be reused.
The specifications and application listed at their website is better too. They do need to work on the 762 listing.
For a flex plate, the smaller 8-cylinder unit with a 10" bolt circle, and mounting lug holes for 5/16" bolts is required. The original Chrysler number is 2400885 which supersedes to 4058429. There are several aftermarket sources, but ATP Z-196 is a good replacement and likely available through one of the mentioned retailers.
Unless damaged, your flex plate to crankshaft bolts and flex plate to torque converter bolts can be reused.
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