Chevy / GMC Transmissions – New Limit Motorsports
We specialize in Chevy and GMC transmission builds — from stock replacements all the way to full competition builds. Whether you're driving a Silverado, Sierra, Tahoe, or Suburban, we have the expertise and parts to keep your drivetrain performing at its best.
From the 4L60E and 4L80E to the 6L80E and Allison 1000, we've built them all. We work on gas and Duramax diesel applications and can build a transmission to match your exact power level and use case — daily driver, tow rig, or all-out competition.
Don't see exactly what you're looking for? Give us a call. We build to suit and are happy to talk through your options.
Monday – Friday: 9:00am – 6:00pm
Saturday: By appointment
Night Drop: Available
Allison
If you're searching for a transmission that can take the heat then look no further. No crazy names for the units being built — just high quality, affordable, and people that stand behind their work!
Below is a list of builds and options.
Stage One
Stage One includes a full rebuild, all new clutches and steels in C1, C2, C3, and C4 utilizing high energy BorgWarner clutches, all new seals, gaskets, filters, and sealing rings. Valve body updates, pump and VB modifications are also performed. A billet single disc converter with a carbon lining is included with this build. This unit is perfect for the daily driver, HD work truck, or minor tuned trucks under 500 RWHP.
Installed, relearned and ready to go — 2001–2016: $4,250 | 2017–2019: $4,550
12 month / 12,000 mile warranty
Stage Two
This is where the fun starts! Intended for big tunes, injectors, larger turbos, and big lifts. Features 16 single-sided C1 clutches (stock is 6 double-sided — a 33% increase in clutch surface area), upgraded C2, C3, and C4 packs, vast valve body and pump modifications, billet triple disc converter from Goerend, deep pan, and deep pan filter. The unit is painted green. Good for 800 RWHP — the most common build. If you plan on keeping a stock bottom end, this is perfect for you!
Installed, filled with synthetic fluid, relearned, and ready to abuse — 2001–2016: $6,150 | 2017–2019: $6,450
24 month / 24,000 mile warranty
Stage Three
Stage Three features a billet input and billet C2 clutch hub in addition to the Stage 2 build. Great for those looking to truck pull or drag race in and near the 1,000 HP area.
Installed — 2001–2016: $7,700 | 2017–2019: $8,000
24 month / 24,000 mile warranty
Stage Four
Stage Four is for the select few with large twins, triples, large shots of nitrous, pulling trucks, strip, and just plain crazy trucks! With the best in billet components you won't be left behind. Set up for no line drop in lockup with transmission line pressures in the 350 PSI range. A fully billet unit that is just starting to get comfortable at 1,200 RWHP.
Installed — 2001–2016: $8,850 | 2017–2019: $9,150
24 month / 24,000 mile warranty
6L50 / 6L80 / 6L90
Stage 1
The entire unit is disassembled and cleaned. All soft parts, seals, and wear items are replaced. The case is cleaned in a hot tank parts washer. Remanufactured with high energy frictions and OEM steel plates. The pump half is replaced with an OEM new GM pump cover kit — the OE pressure regulator bores show significant wear in low-mile vehicles, making a new pump cover a must. Upgraded with a Sonnax boost valve assembly for higher line pressure and longer transmission life. All builds include a billet cover stock stall converter upgrade. The valve body is cleaned and inspected, a new updated separator plate is installed, and the pressure switch manifold is rebuilt.
Stage 1 & converter: $3,100
24 month / 24,000 mile warranty
If you have a converter failure, fine aluminum powder can make its way into everything. If the solenoid filter screens for the TEHCM are blown out, a replacement TEHCM will be needed — this runs about 1 in 3 builds. A Sonnax remanufactured TEHCM costs an additional $499.
4L60E / 4L65E / 4L70E
Stock
All gaskets and seals are replaced. All frictions are replaced. All steels are surfaced and replaced as necessary. The 2/4 band is replaced. Bushing and Torrington bearings are replaced as needed. The 2 and 4 servos are cleaned and inspected for wear. The 3/4 clutch pack comes standard with 4L65E clutches and frictions adding 17% extra clutch surface area for longer transmission life. Includes a new converter.
$1,900
12 month / 12,000 mile warranty
Moderate
Similar to stock with several key upgrades: 1-2 accumulator replaced with an improved unit, 1-2 shift servo replaced with a performance unit, 3-4 accumulator replaced with an updated unit, and the valve body is modified to support these upgrades.
$2,150
12 month / 12,000 mile warranty
Advanced
High energy frictions and steels throughout. The 3/4 clutch pack receives a 33% increase. The sun shell is upgraded with the Beast sun shell. The pump is fully rebuilt with high RPM pump mods. The valve body is modified for high power levels. A wider, higher energy band provides a crisper 1-2 shift. A Corvette servo and modified boost valve raise line pressure. The Advance build with stock input drum is good for around 450 HP. Optional Sonnax Smart Tech drum with billet input shaft (+$600), reinforcement sleeve (+$75), 5-pinion planet sets (+$250).
Call to discuss pricing
4L80E / 4L85E
Stock Rebuild
All seals and gaskets are replaced, all frictions are replaced, the reverse band is replaced, and all hard parts are checked for wear and replaced as necessary. New Teflon rings are installed in each build. The pump is cleaned and inspected for wear and excessive end play. Pump modifications and valve body modifications are made to allow the unit to last and hold beyond what a stock unit would. New converters in all builds.
$2,100
12 month / 12,000 mile warranty
Plow Package
Includes everything in the stock rebuild package plus a Sonnax rear servo spacer kit with a larger footprint to prevent the servo from cracking after constant cycling of reverse and forward. Also includes a self-governing boost valve with a release valve built in to protect from uncontrolled line pressure rise (up to 500 PSI on stock units). New converter included.
$2,250
12 month / 12,000 mile warranty
10L1000
We currently offer Stage 1 and Stage 2 units. A Stage 1 10L comes with a machined E clutch for added clutch counts, an OEM updated F clutch drum (AKA trash can), all new gaskets, seals, O-rings, and lip seals. Rebuilt with Raybestos GPZ frictions throughout for greater holding capacity and heat resistance. Every 10-speed comes with an OEM new updated valve body modified with a Ratio Tek calibration kit — this setup nearly doubles clutch holding capacity and corrects common issues plaguing the 10L valve body. Full-time cooler flow, internal thermal bypass eliminated, 200% cooler circuit feed for better cooling and internal lube. Baseline pressure increased and max line pressure nearly doubled for a much quicker, more positive shift. Each Stage 1 gets a new OEM torque converter.
Installed, valve body programming, and full relearn: $6,999. TCM tuning outside of solenoid programming is additional.
Feel free to call any time!
(518)231-7803