CHEVROLET, GMC, HUMMER, ISUZU TRUCK
4L80E
4L85E
'97-'09 4 SPEED AUTOMATIC TRANSMISSION
(WITH GM RPO CODE: MT1 OR MN8. WITH 17 BOLT PAN):
Smart-Tech® Overrun Clutch Valve Kit
SONNAX 34200-40K
- Insufficient holding power in the overdrive roller clutch is the underlying cause of chronic overdrive roller clutch failure in hardworking 4L80-E and 4L85-E transmissions. When the roller clutch fails, the damage can be catastrophic and the only fix is replacing the drum, planetary assembly and mating components.
- The Sonnax Smart-Tech overrun clutch valve kit 34200-40K offers a hydraulic solution to this known mechanical problem. With unique rerouting of hydraulic fluid pressure, this patented kit keeps the overrun clutch applied at all times (except OD 4th), reinforcing the roller clutch to adequately support heavy loads.
| Range | Gear | Overrun Clutch with
Sonnax 34200-40K
Clutch Valve Kit | Overrun Clutch
with OE
Clutch Valve |
|---|
| Park |
|
Applied |
|
| Reverse |
|
Applied |
|
| Neutral |
|
Applied |
|
| Overdrive |
1st |
Applied |
|
| 2nd |
Applied |
|
| 3rd |
Applied |
|
| 4th |
|
|
| Drive |
1st |
Applied |
Applied |
| 2nd |
Applied |
Applied |
| 3rd |
Applied |
Applied |
| D2 |
1st |
Applied |
Applied |
| 2nd |
Applied |
Applied |
| D1 |
1st |
Applied |
Applied |
- FITS THESE 4L80E & 4L85E EQUIPPED CHEVY, GMC, ISUZU, & HUMMER MODELS:
- AVALANCHE 02-06 4 SP RWD/4X4 V8 8.1L
- C/K PICK-UP 1500-2500 97-99 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/6.5L DIESEL
- C/K,SILVERADO/SIERRA PICK-UP, 1500, 00-03 4 SP RWD/4X4 V8 6.0L
- C/K,SILVERADO/SIERRA PICK-UP, 2500, 00-03 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5 DIESEL
- C/K,SILVERADO/SIERRA PICK-UP 3500 97-03 4 SP RWD/4X4 V8 5.0L/5.7L/6.0L/7.4L/8.1L/6.5L DIESEL
- H1 HUMMER 97-05 4 SP 4X4 V8 5.7L, 6.5L DIESEL
- SILVERADO 1500HD/1500SS/SIERRA DENALI 04-05 4 SP RWD/4X4 V8 6.0L
- SILVERADO/SIERRA 2500/2500HD/3500 04-07 4 SP RWD/4X4 V8 6.0L
- SUBURBAN 1500 97-99 4 SP RWD/4X4 V8 6.5L DIESEL
- SUBURBAN 1500 06-07 4 SP RWD/4X4 V8 6.0L
- SUBURBAN 2500 97-07 4 SP RWD/4X4 V8 5.7L/6.0L/7.4L/8.1L/6.5L DIESEL
- TAHOE/YUKON 97-03 4 SP RWD/4X4 V8 6.0L/8.1L/6.5L DIESEL
- VAN FULL SIZE 2500 97-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/8.1L 6.5L DIESEL
- VAN FULL SIZE 2500 04-08 4SP RWD/AWD V8 6.0L
- VAN FULL SIZE 2500 06-08 4 SP RWD V8 6.6L DIESEL
- VAN FULL SIZE 3500 97-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/7.4L/8.1L/6.5L
- VAN FULL SIZE 3500 04-08 4 SP RWD V8 4.8L/6.0L
- VAN FULL SIZE 3500 06-08 4 SP RWD V8 6.6L DIESEL
- YUKON 2500 04-06 4 SP RWD/4X4 V8 6.0L
- YUKON 2500 04-06 4 SP RWD/4X4 V8 8.1L
- YUKON 2500 07 4 SP RWD 4X4 V8 6.0L
- ISUZU NPR TRUCK (W4) '97-'08 5.7L 6.0L
- FITS THESE 4L80E BENTLEY & ROLLS ROYCE MODELS:
- BENTLEY ARNAGE '02-'06
- ROLLS ROYCE ARNAGE / SILVER SERAPH '00-'03 6.8L
- Smart-Tech® Overrun Clutch Valve Kit includes:
-
-
Socket-Head Cap Screw Long
-
Socket-Head Cap Screws (2) Short
-
Button-Head Screws (2)
-
Retaining Pins (2)
-
Valve Manifold
-
Short Tube
-
Long Tube
-
S-Shaped Bracket
-
Flat Bracket
-
L-Shaped Bracket
-
Gasket
-
End Plug
-
Valve
-
Spring
-
Sleeve
-
Tabbed Bore Plug
-
O-Rings (3) 1 Extra
-
Cap Plugs (2)
-
Aluminum Plugs (2) Small
-
Alignment Pins (2)
-
Drill Jig
-
Drill Bit Small (.109" dia. )
-
Drill Bit Large (.180" dia.)
- Improves OD roller clutch holding power in D4 and Reverse ranges
- Extends the life of workhorse transmissions while preventing warranty claims and comebacks
- Installs quickly onto the valve body — no transmission removal needed
- PHOTO SHOWS ACTUAL KIT CONTENTS
- FREE SHIPPING TO ALL 50 U.S. STATES & PUERTO RICO!
