If your bolt logos match and your front retainer locking tabs are in place it usually is a good indicator that the transmission has never been taken apart. The sequential number for the vehicle doesn't start at 000001. In most cases, if your vehicle has been converted from an overdrive to a 3-speed, you can still use this guide for identification. It is unique to the Muncie and was used until the very end of production in all main cases with the exception of the 3831704 case. Many rebuilders have bins full of tags. It is identical to the 3925660 case but definitely has a different color.
They changed the way that they labeled their transmissions for the 1967 model year. Main cases often suffered from broken mounting ears, but the later cases had thicker, stronger mounting ears. I created a Facebook page at www. Otherwise you're dealing with 2 different vehicles. Used on large displacement, high torque engines and engines with towing packages.
Mid 1984 models contain the body tag and a Service Parts Identification Label located in the center of the console cover. To undertake either method will require you to look under the vehicle. The 3925661 casting seemed to surface by the last quarter of 1969. Missing Entry: 1985-1988 Pontiac Fieros have a 9 engine code for the 2. There are some people that can sell a stolen car with a different code but that looks like a copy of the original vehicle.
Main Case Casting Numbers Here is a procedure I use that works by using components as building blocks toward identification. Or it might have the color code from some other car line on it. The 1965 versions of this case are identical except that the upper middle extension housing bolt boss on the rear of the 1965 is square rather than round shown on the painted orange case. The mounting ears also have thicker gussets than earlier cases. You would think that in nectors. Serial numbers from 1963 to 1966 included only the month and day.
Simply put, it is the number that is actually cast into the case when the molten aluminum is poured into the case mold. Plug the tooth counts into the above formula and you get a first-gear ratio of 2. You will compare the information that was decoded with the real state of affairs with the car. Here are three countergears: late M20 top , M21 middle , M22 bottom. Photo Courtesy Ed Hartnett 1966 and 1967 The 1966 main cases saw some additional design changes.
The Camaro generally starts at either 100001 or 500001, depending on year and assembly plant. Coincidentally, March 1965 seems to be a time when the 396 engine started to migrate into more vehicles, such as Z16 Chevelles, Corvettes, and full-size Impalas. If it was assembled in July or later it's probably a model year later than listed. Therefore, they are not all naturally compatible with one another. I say this because fisher body doesn't care if this is a Z28.
This site is one of the most comprehensive numbers decoding places available anywhere. You won't accidentally fix and alter or obliterate the confidential vin during the repair process - so these numbers will always match up. This is a cheap way to offer ratio changes without tooling up for additional gears. They all have basically the same bolt pattern on the bellhousing. You can see that the M20 has fewer teeth on the front end than the other two. Of course, every company has a unique logo on its bolts. Stamped serial numbers for all 1969 model year cases also included the year designator.
She looked at her cross reference guide and responded 5W-30. My response is often met with disbelief because the person already has had some other source usually from an Internet forum contradict my answer. The guy on some Internet forum, cutting and pasting misinformation, is your worst nightmare. The 3864848 case with the last 848 numbers milled off is in some full-size cars, such as the Impala. Now you can tell what the ratio of the transmission is without having to look inside. Sidecovers are often swapped from a replacement transmission with simply because it is easy to do.
Usually when an external modification is made to the case, such as milling, it means a special internal mod. Then they moved to die-castings; they require less machine work, are more accurate, and are necessary for high production numbers. The first Muncie copied the smaller bearing and retainer combination of the T10. Midplate Castings The casting number for the midplate never changed. The progression of the 10-spline input identification groove system. This could be an alloy improvement, a casting tool change, or some physical change.
For example my examples only apply to 2001-2015 gm vehicles Remember 10th digit from the beginning, left to right. But, they do not all bolt into the crossmember in the same space. In Summary, Fisher body doesn't care if this is a Camaro or a Firebird. Later cases seem to only have one clock. Position five encodes the specific model and trim level of the vehicle. The 6307N bearing has a 35-mm bore, an 80-mm outside diameter, and is 21 mm thick.