Skip to content
Sonnax 84880M-01 4T65E Transmission 3-4 Accumulator Piston fits Century LaCrosse

Sonnax 84880M-01 4T65E Transmission 3-4 Accumulator Piston fits Century LaCrosse

by Sonnax
SKU S84937G
$17.46 - $17.46
$17.46
$17.46 - $17.46
$17.46
Availability:
Low stock

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Manufacturer Part Number: 84880M-01

Brand: Sonnax

Fitment Type: Direct Replacement

Manufacturer Warranty: Yes

4T65-E

3-4 Accumulator Piston
Part No. 84880M-01

It is common to have poor 3-4 shifts, no 4th Gear or a burned 4th clutch in GM 4T65-E units. This can be caused by excess wear at the 3-4 accumulator piston pin bore, which allows 4th clutch oil to exhaust and can result in harsh 4th, no 4th Gear or a burned 4th clutch. Pin bore wear also reduces 3rd clutch pressure during 3-4 shift. The 4th shift quality depends on the condition of the piston and accumulator valves. If the 4th accumulator piston seizes, the 4th shift will be very hard. Sonnax 3-4 accumulator piston 84880M-01 restores accumulator pressure and eliminates cross leaks.

  • Piston is manufactured from high-grade billet aluminum to prevent wear
  • Tight tolerances and surface finish restore proper clearances
  • Piston accepts OE or standard replacement D-ring

Symptoms:

  • 3-4 Concerns
  • 4th Clutch burned
  • Soft 3rd
  • No 4th

Cause:

Wear at the 3-4 accumulator piston pin or bore.

Correction:

Sonnax 3-4 accumulator piston is made from high grade billet aluminum to prevent wear and restores clearances at the pin.

Use this text to share information about your product.

Blog posts

See more