The input shaft has 30 splines. The casting number 3925660 denotes this as a 1968 — 1970 Muncie with a 1-inch cluster shaft. The basic Turbo-Hydramatic spawned two variants, the , and the. Length and volume of the cooling circuit will vary and will require an additional amount. But times have changedespecially with the new generation of four-speed overdrive transmissions. United States Army Drill Sergeant J.
Transmissions are marked and identified by: - Casting numbers on the case, extention housing and side cover on manual trans. Here is a pretty complete list of all of them from the folks over at. They all have basically the same bolt pattern on the bellhousing. Muncie transmissions are known for both high-performance and heavy-duty applications, with three different variations available: the M20, M21 and M22. Most of the info on this site I just know.
These numbers can be found on the transmission case, and the first letter in this series of numbers is going to tell you exactly which Saginaw transmission you are looking at. Do you know how to tell the difference between a Saginaw, a T10, and a Muncie four speed? The transmission case has various codes including the casting code and the serial number. But in non-performance applications, they were still a good transmission. Also manufactured and used by as the Trimatic transmission. Also, there were some input shafts produced by the aftermarket and General Motors that have no identifying rings on them. These grooves were cut into the input shaft so assembly line workers at the plant could easily identify which input shaft should be installed in a particular unit. The numbers 3831707 and the shifter linkage being attached with studs and nuts make this a side cover for an early Muncie.
They are also not the same length. Also, the reverse lever on the Muncie units is mounted in the extension housing, while the Saginaw reverse lever is mounted in the side cover Locate the serial number to differentiate 1969 and up Muncie transmissions. The easiest was is by knowing the construction of each unit, and the differences are obvious. This version did not have a locking converter. Due to the wide combination of id's, stampings, numbers, etc. Although the has been phased out for more than 20 years, you can still find one in the salvage yard.
Of course, that was many years ago. Not only were they both popular transmissions in musclecars and Corvettes, but many were even used after the musclecar era. So it's definitely something you want. This is illustrated at the top of the Year One Tech page, while the input gears are illustrated at the bottom see Reference 2. But, they do not all bolt into the crossmember in the same space. Starting with the 1966 models, the wide ratio versions got two rings around the input shaft, and the M22 input shaft had no rings and looks like a 1963 through 1965 wide-ratio input shaft. If your luck runs out and you need to buy one of our replacement , call GotTransmissions.
The splines are on the shaft going into the engine and the input gear goes into the transmission. If you counted 13, you are either looking at the or the. The previous versions featured a four-bolt square bolt pattern at the adapter or tail-housing. This one was manufactured from 76-81. But, those built between 1963 and 1965 will not have any rings around the input shaft. The M-22 was generally installed behind severely powerful high torque big-block engines.
Further Muncie identification 3 Muncie 4 speeds were offered. How To Tell One Popular Slushbox From Another In the old days, automatic transmissions were scorned by any self-respecting hot rodder. The Turbo 375 was modified to accept the Turbo 350 driveshaft yoke. Casting Number Notes 3831707 Early side cover; 1963 — 1965 3884685 Early side cover; used with 3857584 tailshaft housing 3950306 Late side cover — no switches 3952642 Late side cover with transmission controlled spark switch 3952648 Late side cover with transmission controlled spark switch 335308 Late side cover with neutral safety switch A Quick Look While casting numbers are a definite guideline for identification, a quick, somewhat accurate way to quickly identify Muncie transmissions involves the input shafts. I hope you get the idea. Saginaw Specifics When looking at a Saginaw transmission, the front input shaft will likely have one or multiple grooves cut around its diameter.
Even the Muncie has its limitations, but they are significantly higher than the Saginaw or Borg Warner. The transmission weighs 146 pounds dry, and 162 wet. Nearly all of the have a few things in common. They changed the way that they labeled their transmissions for the 1967 model year. Therefore, they are not all naturally compatible with one another.