Cadillac De Ville
Oldsmobile Aurora
| GM 4T80-E MH1 |
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| Front Wheel Drive Automatic Transmission | ||
| Cadillac Seville Cadillac De Ville Oldsmobile Aurora |
| Description: Four speed front-wheel-drive, electronically controlled, automatic overdrive transaxle with viscous torque converter clutch. | Troubleshooting Fluid Recommendations Maintenance Tips | ||
| Gear Ratio 1st: 2.960 2nd: 1.626 3rd: 1.000 4th :0.681 and Reverse: 2.130 |
7-Position Quadrant: P, R, N, OD, 3, 2, 1 |
Fluid Additives Overhaul Tips Torque Converter Installations Tips | |
| Considering overhauling your transmission? The following list of parts are recommended by our remanufacture as being the parts that are most probably needed to put your 4T80-E back in top running order. This is an abbreviated list and other parts are avialable. If you need something that is not listed just let us know. | ||||||||
| Part Number | Quantity Reg. |
Description |
Year |
|
Price |
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| TM4T80E | Technical Manual | $25.97 | ||||||
| Rebuilder Box Kit | ||||||||
| MRK4300-S | 1 | Master Rebuilder Kit (w/o Steels, includes all filters and O/D Band) | 1993-94 | $659.60 | ||||
| MRK4300B-S | 1 | Master Rebuilder Kit (w/o Steels, includes all filters and O/D Band) | 1995-On | $597.90 | ||||
| Steel Plate Sub-Kits | ||||||||
| K4300-9 | 1 | Steel Plate Kit | 1993-94 | $65.90 | ||||
| K4300B-9 | 1 | Steel Plate Kit | 1995-On | $71.60 | ||||
| Bands | ||||||||
| 43720 | 1 | Low & Reverse | 1993-On | $48.70 | ||||
| Bushings | ||||||||
| K43980 | 1 | Bushing Assortment Kit | 1993-On |
call |
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| Thrust Washers | ||||||||
| K43940 | 1 | Thrust Washer Kit (w/o Selectives) | 1993-On | $37.90 | ||||
| Pistons | ||||||||
| K43900-4 | 1 | Piston Kit | 1993-94 | $319.60 | ||||
| K43900B-4 | 1 | Piston Kit | 1995-On | $319.60 | ||||
| Sprags | ||||||||
| 43813 | 1 | Intermediate Clutch Sprag (16 Elements) | 1993-On | $57.70 | ||||
| 43814 | 1 | Input (Forward) Sprag (36 Elements) | 1993-On | $65.30 | ||||
| 43815 | 1 | Low Roller Clutch (18 Rollers) | 1993-On | $33.80 | ||||
| Chains | ||||||||
| 43888 | 1 | Drive Chain (7/8" Wide -42 Rocker Links) | 1993-On | $103.90 | ||||
| 43888A | 1 | Drive Chain (1" Wide - 42 Rocker Links) | 1993-On | $117.80 | ||||
| The following electronic components may or may not be required. The best way to determine this is by check/consulting computer code(s) or electronic scanner results. | ||||||||
| Electronic Components | ||||||||
| K43871 | 1 | "A" & "B" Shift Solenoid Kit (Updated) | 1993-96 | $103.97 | ||||
| 51873 | 1 | TCC (PWM) Solenoid | 1993-98 | $35.30 | ||||
| 51879 | 1 | Force Motor (EPC) Solenoid | 1993 | $96.10 | ||||
| 33879A | 1 | Force Motor (EPC) Solenoid | 1994-On | $82.16 | ||||
| 43877 | 1 | Pressure Switch Manifold | 1993-On | $51.10 | ||||
| Torque Converters | Torque Converter ---------- Torque
Converter Problem & Information For this series transmission there are MANY different possibile torque converters (not all listed here). When rebuilding your transmission it is always recommended that you change the torque converter. When ordering the torque converter you must supply the four digit code off of the existing unit (located on a sticker). Some of the possibities are: |
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| Part Number | Vehicle Identification | Price | |||||
| C60 | Fits 1993-Up Olsmobile Aurora | Code: 8683441, 8689991, "441" sticker | $141.00 plus core deposit |  |
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| C61 | Fits 1994-Up Cadillac | Code: 8683440, 8689990, "440" sticker, note: The C61 may have an alternate pad type. Either style will interchange. | $141.00 plus core deposit |  |
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| Miscellaneous Information and Specifications | ||
| Engine Range: 4.0L - 4.6L |
Maximum Engine Torque: 305 lb-ft |
Converter Size: 265mm (reference) (Diameter of torque converter turbine) |
| Maximum Shift Speeds: 1-2 6500 rpm 2-3 6500 rpm 3-4 6500 rpm |
Maximum Gearbox Torque: 461 lb-ft |
Fluid Capacity (Approximate): Bottom Pan Removal: 6.6L (7.0 qt) Dry: 13.2L (14.0 qt) |
These manuals are typically 50 to 85 pages and contain both troubleshooting information and data to support overhaul, such as electronic data, illustrations and specific procedures and specifications. These are professional shop manuals which will give you the capability to diagnose problems, and evaluate repair options. If you decide to have your transmission overhauled at a local shop you will be armed with detailed knowledge of problems and potential fixes. This information should allow you to get the best deal, Always compare pricing for labor. If you supply the parts and ask for warranty in the end you will save money.
| Fluid Recommendation: | |||||
| Red Line high-Temp ATF Our Red Line high-Temp ATF --is a synthetic GL-4 gear oil for use where Dexron III is recommended. A higher viscosity allows optimal operation at 70 degrees higher temperature, providing better torque converter efficiency. Perfect for heavily-loaded vehicles. Superior stability allows high-temperature operation without varnishing valves and clutches. nverte Recommended for use after overhaul, mixing with existing fluid is not recommended! Our LubeGard "automatic transmission protectant" is recommended as an additive to improve transmission life and maintenance. |
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Typically contains gaskets and rubber kit, sealing rings, metal/rubber clad seals, friction plates, steel plates* , front and rear bushings, filter and where applicable Band* and/or Modulator*.
*not included if listed separately
Regular maintenance cycles and continued checking of fluid levels is critical to the life of your transmission. Operating temperature is the single most critical parameter effecting the life of the transmission. Keep the temperature down and fluid fresh helps the units typically last a very long time under normal driving conditions (no teenagers involved). We can supply a couple of aftermarket products to help you get the most out of your transmission:
Generally we don't recommend additives but we have found that the Lubegard "Automatic Transmission Protectant" at only $13.93 + S&H can:
Always consult and follow owners manual for maintenance intervals and requirements.
ult and follow owners manual for maintenance intervals and requirements.
Before you tear into the transmission, we suggest you first study the troubleshootin/overhaul manual, add a bottle of our "Automatic Transmission Protectant" and put a few miles on the vehicle. This just might free valves and governors that are possible stuck in valve bodies. Be sure to get computer trouble code(s), see owners manual for technique to acquire malfunction codes. This will be a great assistance in diagnosing possible problems.
Twenty-One Steps to Successful Transmission Repair:
1) Do your research locate any technical bulletins pertaining to your transmission, ask your dealers parts department for bulletins.
2) Clean the entire transmisssion, including the valve body.
3) Check pump, valve body and case for warpage.
4) Flat file pumps, valve bodies, and cases. Just a few strokes with the file to knock off high spots and handling burrs.
5) Check all pump gear clearances.
6) Check planet pinion end play and side to side motion.
7) Soak all planet assemblies.
8) Soak all friction materials for 15 - 30 minutes.
9) Make sure all steels are in usable condition or replace. Do not sand or tumble steels when used against High Energy friction materials.
10) Inspect all surfaces upon which a band will ride.
11) Replace all rotating oil control rings.
12) Check all oil control rings and rubber products in the bores for proper fit.
13) Check all major support bushings and bushings that control lub oil.
14) Pre-lubricate all bushings and thrust washers.
15) Pre-lub pumps.
16) Pre-fill torque converter.
17) Use available manuals to ensure proper specifications and clearances.
18) Set correct clutch and band clearances.
19) Take the time to set the total end play.
20) Use a torque wrench on all pumps and valve bodies.
21) Always double flush the cooling and cooling return lines to the radiator to remove particles trapped there.
Take your time, take your time, take you time!
The difference between stator design, look inside the converter at the larges set of splines (stator shaft splines). If the splines are split then the unit has a dual element stator. Do not interchange single element and dual element converters.
Torque Converter Installation/Preparation
Many torque converter problems can be avoided with proper preparation:
1) Pre-thread converter bolts by hand to make sure there is no sign of stripped threads.
2) Check and clean crankshaft thoroughly. Change crank spacer (if applicable).
3) Use 320 grit sandpaper or Emory cloth to remove any metal shavings on crankshaft.
4) Check converter for any damage that may have occured during shipping.
5) Pre-fill converter with a minimum of (1) quart of transmission fluid.
6) Clean all paint off the pilot using 320 grit emory cloth.
7) Apply grease, not transmission gel, on the pilot.
8) Check flexplate for cracks and be sure there is no more than .006" run out.
9) Make sure all engine dowel pins are in place and clean.
10) Make sure all electrical ground straps are properly connected.
11) Never, Never us an impact gun to install torque converter bolts. Driving a
bolt into the converter cover will create a dimple on the lockup apply surface. Lockup
clutch failure will occur when the lockup piston applies against and uneven surace.
Grinding off on thread length from all lockup converter bolts is recommended to avert
this type of failure.
In addition to the automatic transmission/transaxle parts and accessories, we also provide an impressive list of automotive after market products for car, pickup truck, SUV and 4wd repair parts and accessories that includes rear end covers, ring and pinion gears, OE clutches and heavy duty performance clutches, diesel gauge kits, exhaust brakes, re manufactured manual and automatic transmissions and both manual and automatic overhaul kits. Other products we offer for the RV recreational vehicle market include: REMCO driveline disconnects, tow bar and baseplates and auxiliary overdrive units to improve vehicle performance and save fuel. We have a complete 4 wheeling drivetrain product line including complete differential assemblies, limited slip and other solid locking positractions. We offer transmission conversion kits including the NV4500 and NV5600 as well as replacement kits for light duty GM and Jeep transmissions. You may be interested in visiting our Ford and Powerstroke Diesel page, Dodge Ram and other Jeep pages for detailed information.
Watch for future additions of new products to be added to our on-line catalog including advanced wheels, tires, engine tune-up kits and other accessories.
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