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SKU:
NLT1H00720
Ships for free in 2–4 business days.
GM 700R4 4L60E 4L65E Corvette Servo Piston Kit
$49.99
In Stock
$49.99
Sale price
$49.99
Regular price
This new aftermarket Corvette-style second-gear servo piston kit fits compatible GM 700R4, 4L60, 4L60E, and 4L65E automatic transmissions.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- GM 700R4 / TH700-R4 (1982-up compatible builds)
- GM 4L60 non-electronic
- GM 4L60E
- GM 4L65E
- Other 4L70E-family applications only after exact kit verification
Product Overview
A soft or slipping 1-2 shift can overheat the 2-4 band. A larger Corvette-style servo increases apply area and can create a quicker, firmer second-gear apply when the band, valve body, pressure circuit, and rest of the transmission are healthy.
A servo upgrade will not rebuild worn clutches, fix a broken sun shell, restore low line pressure, or compensate for an incorrectly adjusted or burned band. Very harsh shifts can also reveal other calibration problems.
Identify the transmission and model year, then compare cover, pin, piston, seals, and snap ring. 4L70E/4L75E use should only be claimed where the exact kit supplier specifies it.
Key Features & Performance
- Corvette-style second-gear apply area
- Can firm the 1-2 and 2-3 transition in a healthy unit
- Side-cover service may be possible without full transmission removal
- Includes piston, cover, seals, pin, and ring only as shown
Common Uses
- Improving second-gear band apply for towing or performance
- Replacing a worn or leaking servo piston
- Addressing a diagnosed soft shift before band damage grows
Technical Specifications
- Product Type: Transmission second-gear servo piston kit
- Transmissions: 700R4, 4L60, 4L60E, 4L65E where compatible
- Style: Corvette-style upgrade
- Condition: New aftermarket components
Installation & Fitment
- Verify transmission identification before opening it
- Clean the servo bore and inspect for scoring
- Compare pin length and seal orientation
- Seat the cover snap ring fully
- Road-test with scan data and confirm shift timing and line pressure
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Will this fix every slipping 1-2 shift? A: No. The band, accumulator, valve body, pressure, solenoids, clutches, and calibration may be responsible.
Q: Does the transmission need to come out? A: Many servo jobs can be done from the side of the case, but vehicle clearance and the repair scope vary.
Q: Will the shift feel firmer? A: A larger apply area commonly firms the shift, but the final result depends on transmission condition and calibration.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: 4L60E Corvette servo kit, 700R4 second gear piston, 4L65E firm shift upgrade, GM transmission band apply servo, soft 1-2 shift repair part
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.