Product Description
6T70 (GEN-2) 6T75 (GEN-2) 6T80 4-5-6 Sleeved Accumulator Piston Kit
No tooling required
Excess wear at the accumulator bore or on the critical diameter of the accumulator piston is common in GM Gen. 2 6T70/75/80 transmissions. The 4-5-6 accumulator piston is utilized during apply of the 4-5-6 clutches to smooth engagement.
Wear at this bore allows 4-5-6 clutch apply oil to exhaust, resulting in ratio codes, harsh or delayed application of the clutch pack, burnt clutches and slipping/flares. Sometimes this wear can be addressed by installing Sonnax 4-5-6 accumulator piston kit 124740-57K. However, the casting is subject to severe wear at this location which can be beyond the ability of the non-sleeved 124740-57K kit to address.
Installing Sonnax 4-5-6 sleeved accumulator piston kit 124740-68K provides a positive sealing O-ringed sleeve to eliminate oil leaks and restore normal shift operation and feel, even in the most severely worn bores.
- O-ring incorporated for positive sealing, even in worn bores
- Sleeve manufactured from highly wear-resistant aluminum
- Annular grooves help center piston in sleeve to reduce future side-load wear
- Hardcoat anodized aluminum piston combats premature wear
- Drop-in Zip Valve™ parts install quickly and easily
Symptoms
- 3-4 Flare
- Ratio codes
- 4-5-6 Clutch burned
- Slipping gears
- 3-4 Harsh
Cause
Wear at the accumulator piston bore or on the critical diameter of the accumulator piston allows clutch apply oil to exhaust.
Correction
Recover hydraulic control and renew shift feel and performance by installing Sonnax drop-in 4-5-6 sleeved accumulator piston kit.
Contents
- Sleeve
- Piston
- Spring Large
- Spring Small
- O-Rings (2) 1 Extra
