FAQ LS LT SB BB to 8HP70 75 76 6HP28 6R80 BMW Adapter - Universal Swap Kit

GA4 LS LT SB BB to 8HP70 8HP75 8HP76 6HP28/6R80 BMW Transmission Adapter

Universal Swap Kit

Compatibility Overview

Vehicle: Universal

Engine: GM LS LT SB BB

Transmission Option # 1: BMW 4.4L N63 & S63 – 8HP70 8HP75 8HP76 AWD & RWD

Transmission Option # 2: BMW 4.8L N62 – 6HP28/6R80 Hybrid AWD & RWD (Ask for details)

Rear Driveshaft: Dependent on ATC used. OE, Modified OE or Custom Shaft may be required.

Front Driveshaft: Dependent on ATC used. OE, Modified OE or Custom Shaft may be required.

Starter: OE Shrouded – Minor Modification Required or Aftermarket Unshrouded – No Modification

Mounting: AWD – Custom X-Member & Bushing or RWD – Custom Upper Bracket & X-Member

Cooler Lines: Billet 8AN Adapter Block w/PTFE Line Kit. Optional 10AN sizing available.

Cooler Setup: Adapt an existing AN Cooler or consult with us to add a Cooler & Thermostat Package.

Shifter: BMW F3x Shifter Or Aftermarket "DCT" Shifter - With our Remote Manual Park Release Kit

Flexplate: OE Style GM Flexplate; 3-Bolt 11-1/16" Ø Dia., 3-Bolt 10-3/4" Ø Dia., 6-Bolt 11-1/2" Ø Dia.

Crankshaft: Compatible with LS LT Short Crank & LS LT SB BB Long Crank; No changes required.

What is the Total Conversion Cost for 8HP70 75 76 or 6HP28/6R80?

Average minimum conversion cost starts out around $4000-$5000 when utilizing a stock 8HP.

Based on the chosen components & optional upgrades total conversion cost could easily range from $6000-$10,000+. Estimates DO NOT include installation Labor which will widely vary based on the requirements of the chosen component & must be considered.

These are broad overall estimates taking into account the cost of ALL necessary components listed for a basic conversion; GA4 Conversion Kit, 8HP Transmission, Standalone TCU/Wire Harness, Fluid, Service Parts, Coding & Tuning

Components & Services List – Overview

Option # 1 – 8HP70/75/76

*GA4 Adapter Kit – Universal Kit with components & accessories necessary.

*8HP70 Gen 1, 8HP75 Gen 2, 8HP76 Gen 3 from BMW's equipped with 4.4L N63 or S63 engine.

*Standalone TCU & Wire Harness – MaxxECU, Turbo Lamik, CANTCU, Sound German etc.

*3 Gallons ATF – Adrenaline Speed Shift ATF or Similar Group IV Synthetic Fluid Recommended.

*Service Parts – New Pan/Filter Assembly, Mechatronic Connector Seal, Input Seal etc.

*Coding – Varies based on Standalone TCU/Vehicle – Contact Eric at Houston BMW Coding.

*Tuning – Varies based on Standalone TCU chosen, vehicle build requirements & overall complexity.

*Labor – We provide direct project support from A to Z for DIY or Professional installations.

Option # 2 – 6HP28/6R80 Hybrid

*GA4 Adapter Kit – Universal Kit with components & accessories necessary.

*6HP28/6R80 Transmission – 6HP28 AWD & RWD from BMW's equipped with 4.8L N62 Engine.

*Standalone TCU & Wire Harness – US Shift Quick 6 or OEM TCU

*3 Gallons ATF – Adrenaline Speed Shift ATF or Similar Group IV Synthetic Fluid Recommended.

*Service Parts – New Pan/Filter Assembly, Mechatronic Connector Seal, Input Seal etc.

*Coding – Varies based on Standalone TCU/Vehicle – Contact Eric at Houston BMW Coding.

*Tuning – Varies based on Standalone TCU chosen, vehicle build requirements & overall complexity.

*Labor – We provide direct project support from A to Z for DIY or Professional installations.

How much power can this transmission setup support?

These stock transmission cores commonly handle 600-800 lb-ft & can be built to handle 1000+ lb-ft TQ with upgraded clutch packs & billet components. Years of proven 7 & 8 Second 1/4-Mile Drag Racing Capability by 8HP BMW & Dodge Platforms. 6HP28/6R80 based builds have been 6 & 7 Seconds in the 1/4-Mile with decades of aftermarket support & parts. Aftermarket performance parts for these transmissions are available. Please consult us & your transmission builder.

Factory Transmission TQ Ratings

8HP70 & 6HP28 = 516 lb-ft / 700nm

8HP75 = 551 lb-ft / 750nm

8HP76 = 560 lb-ft / 760nm

6R80 = 590 lb-ft / 800nm.

What gear ratios does the 8HP70/75/76 have?

Gen 1 8HP70 - 4.714, 3.143, 2.106, 1.667, 1.285, 1.000, 0.839 and 0.667:1

Gen 2 8HP75 – 5.000, 3.200, 2.143, 1.720, 1.313, 1.000, 0.823 and 0.640:1

Gen 2 8HP76 – 5.500, 3.520, 2.200, 1.720, 1.317, 1.000, 0.826 and 0.640:1

6HP28/6R80 – 4.17, 2.34, 1.52, 1.14, 0.87 and 0.69:1

What Transmission is recommended & how much do they cost?

Lengthy production years and numerous models provide plentiful options but also can be overwhelming to decipher. Below is a generalized price estimate & model guide but exact compatibility may be difficult should be verified. For this reason we recommend obtaining the donor vehicles VIN # & if possible pictures of the transmission. Using RealOEM.com & other online resources we can check compatibility before purchase.

$200-$1000+ 8HP70 Gen 1 AWD/RWD ~2009-16 N63 4.4L 550 650 750 X5 X6

$200-$1000+ 8HP70 Gen 1 AWD/RWD ~2011-13 S63 4.4L X5M X6M

$800-$1500+ 8HP75 Gen 2 AWD/RWD ~2017+ N63 4.4L M550 M650 M750 M850 X5 X6

$800-$1500+ 8HP75 Gen 2 AWD/RWD ~2013-19 S63 4.4L X5M X6M

$1000-$2000+ 8HP76 Gen 3 AWD ONLY ~2015+ BMW G-Series N63 4.4L M550 M750 M850 X5 X6

$200-$1000+ 6HP28 AWD/RWD ~2008-10 BMW E-Series N62 4.8L 550 650 750 X5 X6

$200-$1000+ 6HP28 AWD/RWD ~2010-13 S63 4.4L X5M X6M

What Transfer Cases (ATC) are compatible with the AWD 8HP70 75 76 6HP28 6R80 Hybrid?

BMW E-Series ATC300 350 400 450 500 700, F-Series ATC35L ATC45L, G-Series ATC13 are all physically compatible. ATC options such as NV or NP series and others may be used with various adapters available on the market. Its important to verify your Standalone ECU/TCU can control the ATC chosen as not all are compatible. If you have questions about ATC choice, adapters, control etc. please consult with us.

When should the transmission or transfer case be purchased?

While you can purchase parts at anytime we recommend waiting until approximately 1-3 weeks ahead of the installation date. Most Used Parts have a 30 day money back return period with a receipt. Within the first 30 days a pre-installation inspection is recommended so if any issues are discovered you can quickly return it. Keep in mind the buyer is usually responsible for returning the item locally or paying for return shipping cost which can be substantial.

Where do I find a transmission and what help is provided to ensure a good outcome?

We provide direct support to all customers and strongly encourage them to work with us through this process. Car-Part, eBay and LKQ are most common recommended sources for used transmissions. Be mindful when purchasing from individuals or any business with cash/no receipt. Ask what the return policy is ahead of time to avoid surprises & always get a receipt.

Our process starts with a broad search of donors that meet our criteria. Using the VIN number we gather Auction/Sale/Wreck information which is used to help verify the advertised mileage and condition of the transmission is accurate. Reviews of the Auto Parts Yard selling the product are also checked. We consult with the customer on choosing one of these transmissions.

We cannot guarantee or be responsible for the condition of these used transmissions but we work hard to reduce the risk and difficulty associated for customers unfamiliar with the process. Local sale is preferred but shipping is common. When receiving freight its best to have a business address or location with a loading dock/forklift or request pickup at your local freight terminal. Residential addresses lift gate service adds cost to freight quotes & most sellers prefer a business/terminal address.

Are modifications required to fit the 8HP or 6HP28/6R80 in a smaller transmission tunnel?

Recommended Mod # 1 Transmission Tunnel Clearance

Remove unused bolt mounting bosses on body/bellhousing that may interfere with the transmission tunnel. Necessary Tools for Mod # 1 = Die or Angle Grinder with Sand/Flap Disc/Carbide Burr/Grinding Stone etc. Cut/Grind away bolt mounting bosses and smooth/contour the surface for maximum tunnel clearance.

Optional Mod # 2 N/A Exhaust/Header Clearance

Remove LH starter bubble to allow Headers/Exhaust Clearance. Not necessary for most Turbo Setups. Necessary Tools for Mod # 2 = Die or Angle Grinder with Sand/Flap Disc/Carbide Burr/Grinding Stone etc. Cut/Grind away LH Starter bubble and profile to the shape of the Adapter plate to allow maximum exhaust clearance.

What Starters are compatible?

•OE Smooth Nose Gen III & Gen IV – Minor Bellhousing Modification Required

•OE Ribbed Nose Gen III – Minor Bellhousing Modification Required.

•OE Camaro/Caprice/G8 – Minor Bellhousing Modification Required

•Aftermarket Unshrouded – No modification; Most high torque starter.

What Torque Converters are compatible?

OE BMW N63 8HP70/75/76 Torque Converters – OE core can be modified for higher stall speed if necessary. Aftermarket options may also be available that are directly compatible.

Circle D HP & Pro-Series Dodge 8HP70/75 Torque Converters – Custom Built; 34mm O.D. Small Pilot. REQUIRES – Alternative "B" Torque Converter Adapter & "C" Pilot Adapter – REQUEST INFORMATION

While any 8HP torque converter will physically fit inside any other 8HP due to variances we can only guarantee fitment with these recommended options detailed above. If you have a specific 8HP converter you would like to use instead please consult with us before hand about a custom torque converter/pilot adapter assembly.

What driveshafts are compatible?

Rear/Transmission – OEM Guibo style driveshafts using common 6HP/8HP 96mm, 105mm & 110mm Output Flanges. Ford 8.8 & similar 1350 U-Joint driveshafts are directly compatible with the RWD 8HP Ram Output Flange. This requires using the OE Dodge Ram RWD Driveshaft Flange & 1350 U-Joint Flange Part# 68417915A.

Front/ATC – Should match transfer case being used. Custom may be required. Please consult with us for further assistance if you aren't sure about fitment. What about the transmission cooler setup?

Our Kit includes components to adapt an existing AN8 or AN10 transmission cooler.

8HP AN Adapter, 8AN PTFE Line Kit w/10 fittings, 10AN/8AN Reducers & A/T Radiator Block-Off for deleting OEM Cooler.

OE Cooler is not Recommended/Compatible. Add AN Cooler Core & Thermostat to complete your cooler setup. Not sure what parts you need? Consult with us directly to add a cooler core & inline thermostat to your kit.

What is a TCU & what options are available to control the 8HP Transmission?

"Transmission Control Unit" is the computer which controls the transmission much like an ECU/Engine Control Unit. 8HP Standalone TCU Options – MaxxECU, Turbo Lamik, CANTCU, Sound German etc. 6HP/6R80 Standalone TCU Options – US Shift Quick 6.

What is required to install the Standalone TCU?

The complexity of standalone installation greatly depends on the controller chosen, its capabilities & components supplied. Some have plug & play wire harness options while others will require intermediate to advanced level wiring to make your own harness. We recommend consulting with the Standalone TCU manufacturer's website & installer/tuner before purchase.

MaxxECU – CAN based TCU for Dodge Gen 1 8HP or Combo ECU/TCU for LS engine and Gen 1 8HP. Multiple ECU model options available with unterminated and custom terminated harnesses. Wide range of features including Trans-Brake launch control, CAN bus integration and much more. Great bang for buck race-oriented ECU/TCU. Extensive support/wiki/community.

Turbo Lamik – Direct Control based TCU for Gen 1 & Gen 2 8HP. Requires removing OEM TCU Chip or "Brain" to hardwire directly into the solenoids/sensors. Wide range of features; Trans-Brake & Virtual Clutch Pedal for Drift Car setups. Well suited to Race setups requiring a high level of control with minimal restrictions. Well established with good support & community.

CANTCU – CAN based TCU for Dodge/BMW Gen 1 & Gen 2 8HP; available with pre-made harness or unterminated. CANFormance & XHP Tuning/Flash Options. OEM style launch control. Effective solution with easy installation, large compatibility range, customer support and instructions. Excels at OEM level drive-ability w/some race features.

Sound German PCS – CAN based TCU for Dodge Gen 1 & Gen 2 8HP. Requires Dodge Shifter. Small package with basic wiring/inputs required. Custom calibration/tuning files available through Sound German. Many features including paddle shifters, Sport/Track mode & Trans-Brake launch control. Knowledgeable support & customer service.

US Shift Quick 6 – CAN based TCU for 2011+ 6R80 w/One Way Clutch; includes unterminated harness. PC based software with easy to use interface. Trans brake style launch control, universal integration options. Great option for controlling 6HP28/6R80 Hybrid builds. Easy setup, mechanical style shifters utilized & USA based support.

What shifters are compatible?

Our Shifter Adapter included in this kit is designed for the F-Series Electronic Shifter.

Ask us about adding a pre-sourced good condition F-Series shifter to your kit or source your own. Premium "DCT" branded sequential style short and long handled shifters are also available!

There are two compatible BMW F-Series shifters which both have 10 pin connectors located at the front side. BMW F2x/F3x/F8x – 61319296896 or F0x/F1x – 61319296904 – Use RealOEM.com for cross reference information.

Other BMW F/G-Series, Dodge & aftermarket shifters may be compatible depending on the Standalone TCU being used. Please consult with us prior to purchase if you intend to use another shifter; Custom shifter adapter will be required.

Will cruise controls work?

Yes; Dependent on chosen Standalone TCU/ECU etc.

Wiring may or may not be required.

Will steering wheel paddle shifters work?

Yes; Dependent on chosen paddle shifters & Standalone TCU/ECU etc.

Wiring may or may not be required.

How does shipping work?

Our preferred method of shipping is UPS Ground; Fully Insured & Signature Required.

Upon final payment customer is notified of estimated shipping date.

Confirmation of package drop-off and tracking information are provided ASAP.

Expedited & International shipping quotes available upon request.

What about local sales tax?

8.25% Sales Tax will be applied to Texas orders.

What about International import fees?

International customers are responsible for all customs import taxes, duties & tariffs.

LS LT SB BB to 8HP 6HP BMW Transmission Adapter Kit - Universal

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