Speedfactory Honda B-Series FWD2AWD Transmission Conversion Kit w/ 1-2 Fork, Bearing, and Shims

The SpeedFactory Racing FWD2AWD B-Series Gear Conversion Kit has been created to provide you with the parts and modifications needed to easily retrofit a stock layout FWD B-Series gear set into your B AWD transmission with NO MACHINE WORK required!

Detailed instructions are included, and we recommend checking out our FWD2AWD YouTube Video for an in-depth install with component explanations.

Why would you want to do this?

The B AWD factory ratios were designed for a heavy SUV with a low 6.3k-6.7k rpm rev limit and feature a super short 1st gear which does not work well with high revving high performance applications and creates major shifting difficulties due to the huge ratio spread on the 1/2 shift.

The stock B AWD 1/2 shift forks are very thin and weak, often bending even in stock transmissions and are too thin for use with a FWD 1/2 slider.

B AWD specific gear set options are very limited and retrofitting other oem gears used to require tedious machine work and custom spacer machining.

This kit now eliminates any need for machine work and opens your ratio options up to use almost any existing B-Series FWD gear set (either synchro or dog engagement that uses a factory style layout) and at the same time fixes the weak 1/2 shift fork issue by replacing it with a new much thicker and stronger billet fork!

Included Components/Services:

1. Billet SFR 1/2 Shift Fork Conversion Service (Requires customer-supplied B-Series AWD 1/2 shift fork core to be sent to us) - Our hardened & shot peened billet steel retrofit upgrade is super strong and has the proper fork pad thickness to work with a FWD 1/2 slider.

2. Custom SFR 1st Idler Gear Split Needle Bearing - Previously if you wanted to attempt this conversion you had to machine the ID of the 1st gear larger or machine the countershaft journal height larger. With this custom bearing no machining is necessary!

3. Custom SFR Precision Spacers – Needed to achieve proper component locations

Mainshaft Spacer (replaces the oem flat washer under the mainshaft - retain the flex washer underneath and set endplay to factory specs)

1/2 Hub Spacer (goes under the 1/2 slider hub)

Reverse Thrust Washer (goes under the reverse idler gear if you are using a short 41.9mm tall FWD 3.0 ratio idler gear. If you have a 45.8mm tall FWD or AWD 3.0 ratio reverse idler gear you do not need to use this washer)

Upper Cuff Shim (For use with Albins B Dog Set only, not used for synchro sets)

NOTE: You will need to use the gears, hubs, sliders, and synchros from the FWD sets and the pinion shaft and ring gear will still need to be an AWD specific set – either OEM or OEM compatible aftermarket final drive set. (Note: The B AWD 2nd synchro & 3rd/4th hub/slider/synchros can also be used.)

After you purchase this kit, please send your stock, unmodified B AWD 1/2 Shift Fork along with your contact information and order # to:

SpeedFactory Racing
ATTN: FWD2AWD
5001 S Burlington Way Suite A
Tacoma, WA 98409

NOTE: DO NOT SEND IN A FORK THAT HAS BEEN PREVIOUSLY MODIFIED OR HAD BRACES WELDED ON, WE WILL NOT USE IT.

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What Do You Recommend for Synchro Sets?

For a super strong and street-able synchro set we recommend using the Albins Helical B Synchro set.

If you simply want the ability to run different ratios and don’t need the strength of a high quality aftermarket gearset, then the factory B16/ITR/GSR type gearsets will now be an option for you. We do not recommend using LS gearsets. Although the 1/2 are the same ratio as GSR, it lacks the dual-cone synchro on 2nd gear and will not work well for a high rpm/fast shifting performance application. LS 3/4 gears are not compatible as they use a smaller 54mm synchronizer.

What About Dog Sets?

For race car use we recommend the Albins 1-4 Helical B Dog set with Upper Cuff that we h...