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Hard Parts

700R4 Sprag Clutch 1982

$67.89
In stock • ships from the USA

700R4 Sprag Clutch 1982, used and ready to install. Fits the 700R4. Ships fast from the USA.

Fits these transmissions
Secure Stripe checkout • free shipping over $100 • 30-day returns
Secure Stripe checkout
Ships from the USA
30-day returns

About this product

The first 700R4s, built for the 1982 model year, left the factory with the narrow low roller clutch shared with the TH350, and on a 40-plus-year-old truck, Camaro or Corvette that is often the part that finally lets go. If your 1982 700R4 sits in neutral for a moment when you pull away in Drive, or only moves cleanly in manual Low, this used center support assembly with a wide roller clutch is the repair and the upgrade in one piece. It includes the support, inner race, wide roller clutch and retaining snap rings.

What the low roller clutch does in a 1982 700R4

In the original 1982 design the low roller clutch is the only thing holding the reaction carrier in first gear in Drive. It locks when torque comes through the gear train and freewheels the moment the 2-4 band takes over for second, so the 1-2 shift happens without any overlap between two clutches. Manual Low adds the low/reverse clutch pack for engine braking. The support is the outer housing, held in the case by a snap ring, while the inner race rides with the planetary gear set.

Swapping the narrow original for the wider assembly here puts more roller contact on the race and gives more holding capacity, which is why rebuilders use it in early units that are getting more power or towing duty than they saw in 1982. It drops in without any machining.

Symptoms on an early 700R4

An early 700R4 has no electronics and no codes. Burnt 3-4 clutches from a misadjusted TV cable are this unit's most common failure, so do not confuse a 3-4 slip with a first-gear problem.

How to confirm before you buy

Road test in Drive and then in manual Low from a stop. Good in Low and poor in Drive isolates the roller clutch. If the truck also shifts late or harsh, set the TV cable before anything else, following our 700R4 TV cable adjustment guide. Our 700R4 common problems guide covers the rest of the early unit's weak spots.

Fitment

Listed for the 1982 700R4, and the same assembly also fits later 700R4, 4L60E, 4L65E and TH350 units. The 700R4 was revised several times during its run, and this is a used part, so match the support's outer lugs, snap ring and inner race splines to the one you remove. Send your year and VIN if you want us to check it first, or see everything for the unit in our 700R4 parts collection.

Install notes


Specifications

Fits700R4 1982
Part typeSprag Clutch
ConditionUsed
BrandOEM
ShipsFrom the USA
Warranty1-year

Complete the job: parts that go with this

Doing this repair right usually means replacing these at the same time. Same transmission, ships together.

700R4 Overhaul Kit
700R4 Overhaul Kit
$60.99
700R4 Input Drum 1987
700R4 Input Drum 1987
$97.98

700R4 Sprag Clutch 1982: common questions

Did the 1982 700R4 use a narrow low roller clutch?

Yes, the TH350 and early 700R4 used the narrow roller clutch. This assembly carries the wider roller clutch, which gives more holding power and installs without modification.

What is included?

The center support (outer housing), the inner race, the wide roller clutch and the retaining snap rings. It is a used assembly.

My 1982 truck slips in third, not first. Will this help?

No. A slip on the 3-4 shift is almost always the 3-4 clutch pack, often burnt by a misadjusted TV cable. This part only affects first gear in Drive.

How do I know which way it should lock?

Turn the inner race by hand before installing and compare it with the assembly you removed. It must freewheel one way and lock the other; reversed, you lose first in Drive.

What fluid does an early 700R4 use?

Dexron ATF. A current Dexron-VI fill is backward compatible with the older Dexron grades the unit was designed for.


Repair guides for this job

Sources
  1. Sonnax — Mastering Endplay in 4L60/E Transmissions: A Step-by-Step Guide. Describes the center support as the Low/Reverse one-way clutch outer housing snap-ringed into the case, the inner race floating with gear set movement, and the .005-.036 in. unit endplay range for the 4L60 family. www.sonnax.com/tech_resources/1661-mastering-endplay-in-4l60-e-transmissions-a-step-by-step-guide
  2. Sonnax — 700-R4 (4L60) Performance Transmission Build Guide. 700R4 timeline: auxiliary valve body introduced in 1987 and the unit renamed 4L60 in 1989, the basis for 4L60-family service data applying to the 700R4. www.sonnax.com/tech_resources/943-700-r4-4l60-performance-transmission-build-guide
  3. TCI Automotive (via COMP Cams) — 700-R4/4L60E Low Roller Clutch, part 373601. Aftermarket replacement low roller clutch for the 700R4/4L60E; states the forward sprag and low-reverse roller clutch should both be replaced on a performance build. www.compcams.com/700-r4-4l60e-low-roller-clutch.html

700R4 Sprag Clutch 1982

$67.89
In stock • ships from the USA • 30-day returns

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