4L70E Shift Kit 1982, remanufactured and ready to install. Fits the 4L70E. Ships fast from the USA.
Although this part is filed with our shift kits, it is a hard part: a remanufactured 5-pinion front planetary set for the GM 700R4, 4L60, 4L60E, 4L65E and 4L70E. If your truck howls in certain gears, has lost a gear outright, or left bronze and steel glitter on the pan magnet, the front gearset is a prime suspect, and no valve body kit will fix it. The set includes the 5-pinion front planetary carrier, the front ring gear, the bearing-style front ring gear hub and both bearings.
The 4L70E builds its four ratios from two simple planetary gearsets working together, the front (input) set and the rear (reaction) set. The input sun gear, driven through the forward sprag, turns the front set, and its ring gear and hub carry that motion to the output shaft. Because torque passes through the front pinions in every forward range, they take a beating behind a V8 that tows. The 4L65E and 4L70E answered that with five pinions in the front carrier instead of the four used in most 700R4 and 4L60E units, spreading the load across more teeth and bearings.
This set was cleaned and every carrier checked for pinion play. Any carrier with play was taken apart and rebuilt with new pins and bearings. The remanufactured set is checked rather than new, and the gear teeth have already proven themselves in service.
Noise diagnosis comes first. A whine tied to engine speed in Park and Neutral points to the pump, while one tied to road speed and gear points to the gear train. Pull the pan and inspect the magnet: fine gray paste is normal wear, but chunks, needles or bright flakes mean a hard part is failing. Our 4L70E pump failure guide helps separate pump noise from gear noise, and the 4L70E common problems guide covers the rest of the failures.
The set is listed for 1982-and-later 700R4, 4L60, 4L60E, 4L65E and 4L70E transmissions as a direct replacement, which makes it both a stock replacement for a 4L65E or 4L70E and the common 5-pinion upgrade for an older 700R4 or 4L60E. The front planet bearing and hub changed over the years, and this hub is the bearing style, so compare it with your old hub and check the output shaft spline count before you buy. If your unit has been rebuilt before, match what is in it now. Send us your year and VIN if anything is unclear, and our 4L60E, 4L65E and 4L70E interchange guide explains which hard parts cross over. Every part for this unit is on the 4L70E parts page.
Replace the thrust washers and bearings around the gear train, check the input sun gear and output shaft splines for wear, and measure input endplay after assembly; a gear train that is stacked too tight or too loose will eat the new set. A failed planetary spreads metal through every circuit, so this job goes hand in hand with a full overhaul using a 4L70E master rebuild kit, and the input housing should be inspected or replaced with a new input drum. Flush the cooler, then fill with Dexron VI.
| Fits | 4L70E 1982 |
| Part type | Shift Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
No. It is a remanufactured 5-pinion front planetary set: the front carrier, front ring gear, bearing-style ring gear hub and both bearings. It is a gear train part, not a valve body calibration kit.
The set is listed as a direct replacement for 1982-and-later 700R4, 4L60, 4L60E, 4L65E and 4L70E units. Compare hub style and output shaft splines with your old parts before installing.
Pump noise follows engine speed and is present in Park and Neutral. Planetary noise follows road speed and usually changes from gear to gear.
Thrust washers and bearings in the gear train, plus a full overhaul kit if the old set shed metal. Inspect the input sun gear, reaction sun shell and output shaft as well.
GM specifies Dexron VI automatic transmission fluid for the 4L70E.
