Muncie Case Casting Numbers
by Paul Cangialosi
Click here to find out about the new Super661 Muncie case.
Customer Service Phone: 561-743-5600
PLEASE NOTE: If you are going to cut and paste this info on a website do the right thing and credit us for the information.
Main Case
| Casting Number | Description / Years |
|---|---|
| 3831704 | 1963 only, small 6207NR front bearing, Pat. Pending, 7/8" bore |
| 3839606 | 1963–1964 regular bearing, Pat. Pending, 7/8" bore |
| 3851325 | 1964–1965, 7/8" bore, Patent Pending, mostly 1964 |
| 3851325 | 1964–1965, 7/8" bore, Patent Number |
| 3864848 | 1965, 7/8" bore, Patent Number (rare) |
| 3864_____ | 1965, milled off last 3 digits, 7/8" bore, Patent Number |
| 3885010 | 1966–1967, 1" bore, Patent Number |
| 3925660 | 1968–1970, 1" bore, Patent Number |
| 3925661 | 1969–1974 (some early 1975 cars), 1" bore, Patent Number |
Tailhousing
| Casting Number | Description / Years |
|---|---|
| 3831731 | 1963 "Thin Fin Tail", driver side speedo, 27 spline |
| 3846429 | 1963 "Thin Fin Tail", driver side speedo, 27 spline |
| 3846429 | 1963–1965 regular thick web, driver side speedo, 27 spline Used up to 1970 in some Pontiac models |
| 384362 | 1963–1964 long tail, driver side speedo, 27 spline |
| 9779246 | 1964–1965 Pontiac Catalina long tail, passenger side speedo, 27 spline |
| 3857584 | 1966–1970 passenger side speedo, 27 spline |
| 3978764 | 1970–1974 passenger side speedo, 32 spline output |
Side Cover
| Casting Number | Description / Years |
|---|---|
| 3831707 | 1963–1965 early side cover, stud type shift shafts |
| 3884685 | Cover issued with "584" tail, stud type shift shafts |
| 3950306 | Short boss, bolt-on type shift shafts, no switches |
| 3952642 | Long boss, bolt-on type with TCS switch on 3–4 |
| 3952648 | Short boss, bolt-on type with TCS switch on 3–4 |
| 335308 |
Long boss, bolt-on type with neutral safety switch. Some have a boss for the switch that is cast but not machined on 1–2. |