This is a document for my own rebuild of a 2001 Chevrolet Suburban 1500 LT with a 4L60E transmission. The goal of the project was to build a performance-towing, extremely reliable transmission. A lot of parts could have been reused with no issues, significantly decreasing the total project cost, but I wanted to address as many common failure points as practical and reduce doubt for any future failures for many thousands of miles.
The final parts bill came to $1,455.65. While that sounds expensive for a 4L60E rebuild, this wasn’t a basic overhaul. In addition to all wear items, seals, bushings, clutches, steels, bearings, electronics, and a new torque converter, I upgraded many of the transmission’s well-known weak points including the sunshell, forward sprag, servos, shift calibration, input drum, and band assembly. The result is a transmission that should be significantly more durable than the original factory unit while retaining stock drivability and towing characteristics.
In any case, remember to check the parts as they come in to ensure the seller sent the correct parts. I had over 5 times where the seller was missing parts or had sent the parts for a later model 4L60E. I was able to get the replacements, but it added significant lead time to finishing the project as the sellers most often did not rush ship the replacements. In all cases I was able to keep the mis-sent products.
This list reflects the parts I chose for my specific goals and may be excessive for a typical rebuild. Many OEM components can be reused if they pass inspection and measurement.
Parts
98 up 4L60E 4L65E 300mm Chevy GMC Cad 5.3L 6.0L stock stall HD Torque Converter.
I had concerns that there were metal shavings within the torque converter which is known to be nearly impossible to flush. You might be able to take yours to be remanned, or trade in for a reman. I went with a stock stall since I do towing and use my vehicle for utility. A higher-stall converter requires the engine to reach a higher RPM before transmitting significant torque to the transmission.
Total: $193.73
Bushing Kit 4L60, 4L60E, 700R4 85up w/wide SONNAX rear SG 77010-01. 13 Bushings
I could have measured tolerances, but for $30, it was a peace of mind to do. You will require the 4L60E bushing tool kit to push and press in new bushings. Some bushings might be skipped if a hard part is being replaced and already has a new bushing installed. If you’re not planning on replacing bushings, which I advise against, you can skip this.
Total: $32.42
4L60/60E 13 vane PUMP ROTOR KIT 87+ W/ROTOR,SLIDE,VANES,RINGS,GUIDE AND SEALS
This is only good if the pump is still in good shape and has a smooth surface within the pump. Might be able to get away with a rebuild kit that includes the seals and skip this.
Total: $51.95
4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up
Sonnax’s 77767K Dual Servo increases 4th gear band holding capacity and is intended to improve overdrive durability. While not strictly required for a stock rebuild, it complements a wide-band upgrade and may be beneficial in towing or heavy-duty applications where the transmission sees sustained load in overdrive, such as sustained highway use. Can be skipped if budget is a concern.
Alternatively, you can go with a Superior K034 for a similar 4th gear upgrade https://superiortransmission.com/product/superior-k034/
Total: $105.39
4L60E Transmission Rebuild – Steel Clutch Kit – 21-Plate Set – Complete Module
Existing steels can be reused if in good condition. However, this requires the ability to tell if they are burned, glazed, pocked, spotted, warped, or in other ways damaged which could be difficult to tell. Most shops replace them in any case.
Total: $68.88
700R4 4L60E 4L65E Performance PowerPiston™ Set Alto Red Eagle® 057960HP 1994-Up
Required replacement for any rebuild. OEM might have the older aluminum/cast part, definitely replace with the rubber-molded part.
Total: $53.85
Sonnax 74480D 4L60 4L65 4L70E Transmission 3rd Accumulator Checkball Capsule
It’s recommended to replace as checkballs can be a weak point where leaks can occur if the ball doesn’t seat well.
Total: $15.61
. 4L60e OVERHAUL KIT 1997-03 gasket set rings and seals
A very basic kit of seals and other soft parts. I did not go with a Master Rebuild kit because I assembled my own kit with individual parts that I wanted.
Total: $48.63
9PCS 4L60E 4L65E Transmission Solenoid Kit For 1993-05 GM EPC Shift TCC 3-2 PWM
People state that for full rebuilds it’s recommended to completely replace all electronics since they tend to degrade over time and moving them to remove them sometimes causes internal breaks in the wiring that could be imperceptible. At $120, it is a lot but will eliminate any electrical headaches which are a huge pain.
Total: $117.98
77749-02K 4L60E 700R4 4L65E 4L70E Sonnax Smart Shell Sun Shell Heavy Duty 99930
This is supposedly a superior sun shell compared to OEM. It has an additional welded reinforcement ring to prevent cracking. It is noticeably stiffer than OEM. Requires a new sun shell thrust bearing (included with shell). Replacing this will change your endplay.
Total: $124.49
TransGo Shift Kit GM 4L60E Includes .500″ Boost Valve (4L60E-HD2) 1993-up
This can be skipped if you want an OEM, stock feeling transmission. This does firm up every shift when installed in the default configuration, which helps prevent prevents slipping and wear between shifts which significantly increases transmission life. However, this may cause discomfort if one doesn’t predict the shift points and revs accordingly.
Total: $119.02
Borg Warner 700R4 4L60E 4L65E 4L70E Forward & Low Reverse Sprag Set
This is the recommended replacement as the OEM cage for the forward sprag is a single cage instead of a double cage setup and an improved top and bottom race.
Total: $75.76
4L60E Rev. Input Drum and Band (refurbished) 93+ square hole with wide HE band
This can be skipped if the reverse input drum is perfectly flat (checked with a known flat tool edge) and no scoring or burn marks are present. If you purchase a wide band, you will need a new drum since the normal wear from an OE band will be different if you keep the old drum. The wide 2-4 band increases the friction area between the band and reverse input drum, reducing wear and improving holding capacity. While not strictly required for a stock rebuild, it is a common durability upgrade, particularly in towing and heavy-duty applications. Because the wider contact surface uses a different wear pattern, a matching wide-band reverse input drum is recommended.
Total: $74.68
BORG WARNER 4L60/4L60E/4L70 CLUTCH PACK 1987 UP ALL EXCEPT 04+ W/6.0
Any hi-energy bands will work. I went with Borg Warner because it’s a well-established brand that is frequently used as an OE supplier. Consistent and predictable.
Total: $84.32
For GMC Chevy Truck 2422942 4L60E Prndl Neutral Safety Switch Mlps 1995-2003
Some people recommend replacing for a full rebuild, I did not.
Total: $20.56
Superior K012 4L65E Billet 2nd Gear Super Servo GM 4L60E 4L70E Transmission 1-2
The K012 increases apply force on the 2-4 band, reducing the chance of band slip under load. This can improve durability in towing, heavy-duty, and performance applications while also producing a firmer 1-2 shift. Can be skipped if budget is a concern.
Total: $148.29
LS Engine Transmission 4L60e Bell Housing Bolts Set Kit Also fits 4L80e T56…
The OEM bolts are an E-Torx head, which can be prone to shearing if care isn’t taken to ensure the bolt isn’t seized. Since it’s cheap, just replace them with regular bolts.
Total: $16.23
4L60E 4L65E 4L70E Input Drum Reinforcement Kit 7773351KA GM 4L60 Input Drum Kit
The input drum reinforcement kit is based on Sonnax’s 77733-51K design and strengthens the input housing assembly by replacing the OE forward clutch apply pistons with a more robust arrangement. While not a mandatory upgrade for every rebuild, it addresses another potential hard-part failure point and complements other durability upgrades such as the Smart Shell and upgraded sprag. This replaces two components of the forward clutch apply pistons.
Total: $38.96
4L60E 700R4 Bearing & Thrust Washer Kit with Input Shim Kit & Thick Pump Washer
Recommended to replace all thrust bearings since you’re in there.
Total: $64.90
Grand Total: $1455.65
Tools / Consumables
4L60 4L65 4L70E Transmission Tool – Remove 3rd Accumulator Checkball Capsule
This is to remove the 3rd accumulator checkball. If you’re not replacing it, skip this tool.
Total: $24.44
Shop Press – get one with enough space to fit the transmission case. You can get away with only using the bushing driver listed below.. But it will take more care and effort to drive bushings in straight. It feels like cheating using a press. I got mine used on Facebook Marketplace. If you’re not planning on replacing bushings, which I advise against, you can skip this.
Total: $100
13 PCS Master Bushing Driver Set Fit for GM 700-R4 4L60 4L65E 4l60E Transmission
Absolutely necessary to drive bushings in/out. You could try to use different sized sockets, but you’ll find that you will deform the bushing with the unequal pressure since you would not have that stepped, inner portion of the driver keeping the walls of the bushing from crushing inward. If you’re not planning on replacing bushings, which I advise against, you can skip this.
Total: $44.92
Turbine Shaft Teflon Seal Installer Tool Kit For GM 700R4 4L60 4L60E 4L65E 4L70
Stator Shaft Teflon Seal Installer/Resizer Transmission Tool For GM 700-R4 4L60E
Try to get these as a single kit if cheaper. Absolutely necessary if you’re using the OE teflon seals and not cut seals. Cut seals are not recommended since they by design are split and could cause a leak or blow out, even if it is much easier to install.
Total (turbine): $12.98
Total (stator): $16.46
Lubegard Assemblēē Gōō™ 16 oz. Tub (1 Each) Transmission Assembly Green Blue
You really only need green in Texas, but I wanted to have both just in case.
Total: $34.65
Front Pump Alignment Band Transmission Tool For 4L60 4L60E T-1097 J-21368-A New (got caught up in shipping – ended up refunding order)
https://www.amazon.com/dp/B0GN93SGF3?ref=ppx_yo2ov_dt_b_fed_asin_title
Not necessary if you can find a cheap but large hose clamp.
Total: $12.58
Kent-Moore J-24773-1 Transmission Oil Pump Remover End Play Checker 4L60E
Kent Moore J-25022 End Play Adaptor Tool
This was to check endplay – it was basically useless to me. This will require using a dial indicator.
Total (J-24773): $41.08
Total (J-25022): $23.82
https://www.harborfreight.com/clamping-dial-indicator-63656.html
This is required if you are measuring endplay. You can get away with using a rag and clamp instead of the Kent-Moore endplay tools.
Total: $44.99
https://www.autozone.com/p/valvoline-auto-transmission-fluid-883572/1177604?searchText=atf%20dex
Any Dexron III and up will work, but the working life of Dexron VI is about twice as long, so might as well since it’s empty. I got mine on sale at $30~ a bottle, for three bottles. I ended up needing about half a quart over what was expected.
Total: $98.97
https://www.autozone.com/p/lubegard-transmission-cooler-flush-19001-unv/36205
If you’re reusing the transmission cooler, you’ll need to flush the cooler and lines.
Total: $16.99
https://www.amazon.com/dp/B004UC9WJE?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0
This is required for taking off the bellhousing adapter. You could drill out the bolts, but that will require cobalt bits and not the cheap titanium to get through the hardened bolts.
Total: $20.24
https://www.amazon.com/dp/B08CXLDJN8?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
Absolutely needed to compress the various springs. I plan on modifying mine to work with my shop press so that I don’t need to use a screw.
Total: $26.99
https://www.harborfreight.com/135-split-point-cobalt-drill-bit-set-29-piece-61885.html
Try to get these on sale. Unfortunately, I was not able to. Nice having them now.
Total: $130.00
https://www.amazon.com/dp/B0DSL9R1RV?ref_=ppx_hzod_title_dt_b_fed_asin_title_1_0
This made life so much easier. When properly mounted to a surface that won’t be cantilevered, this can support the entire transmission assembly.
Total: $53.99
https://www.amazon.com/dp/B0BSTX72L1?ref=ppx_yo2ov_dt_b_fed_asin_title
Needed to compress the spring assembly at the bottom of the case.
Total: $9.95
https://www.amazon.com/dp/B0DR9L11CS?ref_=ppx_printOD_title_dt_b_fed_asin_title_0_0
Needed for certain steps where glazing needs to be knocked off. If you’ve got various grit sandpapers, you can skip this.
Total: $13.99
https://www.amazon.com/dp/B08KRVPMYB?ref_=ppx_printOD_title_dt_b_fed_asin_title_0_1
Needed for certain steps where glazing needs to be knocked off or parts cleaned.
Total: $18.99
https://www.amazon.com/dp/B0F8Q3FRKJ?ref_=ppx_printOD_title_dt_b_fed_asin_title_0_2
When flattening pieces such as the water pump. Will need to be use with a known flat surface such as float glass or a slab of granite.
Total: $7.99
https://www.harborfreight.com/450-lb-low-lift-transmission-jack-70262.html
Very helpful in the removal and installation of the transmission. Just remember to adjust the inclination screws before trying to stab it into place.
Total: $120.00~
If you can, get a set like this just so you have more sizes:
https://www.harborfreight.com/cobalt-fractional-number-and-letter-index-drill-bit-set-115-piece-59816.html
https://www.homedepot.com/p/MUSTEE-Utilatub-24-in-x-20-in-Structural-Thermoplastic-Floor-Mount-Utility-Tub-in-White-19F/100030653
I was able to use an existing utility sink to wash many parts including the transmission housing. I had mine plumbed and used Simple Green and brushes to clean the parts. A parts cleaner from Harbor Freight would also be great since it’s a standalone unit without the need to be plumbed.
https://www.harborfreight.com/20-gallon-parts-washer-with-high-flow-pump-58679.html
https://www.harborfreight.com/snap-ring-pliers-with-reversible-action-63938.html
A good quality snap ring plier is necessary for removing and reinstalling some of the snap rings. Don’t cheap out.
Total: $13.99
Grand Total: $888.01
And of course the following:
- sockets
- extensions
- wobble adapters
- ujoint adapters
- wrenches
- picks
- prybars (small and large)
- flathead screwdrivers (some really long ones help)
- Impact wrenches
- torque wrenches
- rags
- cleaning products (brake/spray cleaners, Simple Green)
- Lights/Lamps
- Hammers
- Handheld sledge
- Rubber mallet
- Jack + jack stands
- Wheel chocks
- Pliers
Project Total: $2,343.66
(does not include tools I already had)
The total investment in the project was approximately $2,344 including specialty tools and consumables. For a one-time rebuild, a professionally remanufactured transmission may be more economical. However, many of the tools purchased are reusable for future drivetrain and transmission work, significantly reducing the effective cost of subsequent rebuilds.
What I Would Absolutely Buy Again
- Torque converter
- Smart Shell
- Forward sprag
- Wide band/drum
- TransGo HD2
- K012 servo
- Bushings, bearings, and seals
What I’d Consider Optional
- Dual servo
- Input drum reinforcement
- MLPS switch
- Pump rotor kit (if the original pump checks out)
