Transaxle Identification
The LGG (62TE) transmission is identified by a barcode label (1) that is fixed to the transmission case or the "PK" number (2).
- T = Traceability
- Supplier Code (PK = Kokomo)
- Component Code (TK = Kokomo Transmission)
- Build Day (344 = Dec. 9)
- Build Year (9 = 1999)
- Line/Shift Code (3 = 3rd shift)
- Build Sequence Number
- Last Three of P/N
- Alpha
- Transaxle Part Number
- P = Part Number
The label contains a series of digits that can be translated into useful information such as transmission part number, date of manufacture, manufacturing origin, plant shift number, build sequence number.
If the tag is not legible or missing, the "PK" number, which is stamped into the transmission case behind the transfer gear cover, can be referred to for identification. This number differs slightly in that it contains the entire transmission part number, rather than the last three digits.
| LGG (62TE) | Elements Applied | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| GEAR | RATIO | UD | OD | R | 2-4 | L-R | LC | DC | ORC |
| 1 | 4.127 | A | A | A ^ | H | ||||
| 2 | 2.842 | A | A | A | |||||
| 3 * | 2.284 | A | A | A ^ | H | ||||
| 4 | 1.573 | A | A | A | |||||
| 4 | 1.452 | A | A | A ^ | H | ||||
| 5 | 1.000 | A | A | A | |||||
| 6 | 0.689 | A | A | A | |||||
| R | 3.215 | A | A | A | |||||
- A = Applied
- H = Holding
- * = Limp-in Mode
- ^ = Applied in coast only
In total, the LGG (62TE) provides seven forward ratios and one reverse.
The underdrive compounder assembly has two modes of operation: direct and reduction.
Notice in the chart, the 2-3, 3-2, and 4-2 shifts require a "double swap" shift. This occurs when two elements are turned off while two different elements are engaged.
This clutch-to-clutch synchronization takes place within 40 to 70 milliseconds, producing a smooth shift. If the underdrive compounder assembly shifts too early (in relation to the shifts taking place in the main centerline), a shudder or harsh shift results. If the underdrive assembly shifts too late, the driver experiences a "double bump" sensation.
To avoid a double swap shift in a 6-4 downshift, the transmission shifts into 4th prime, which requires the deactivation of the overdrive clutch and the simultaneous application of the underdrive clutch.