NEW Automatic Shift TH400 transbrakes available NOW!
TH400's are what we cut our teeth on. We have extensive experience building the TH400 for all types of applications. We do stock rebuilds all the way up to 1500+ HP Monster Truck applications.
Our "stock" rebuild is strong enough for over 600 HP repeatedly yet functions like a stock transmission.
We specialize in building TH400's for forced induction street driven applications where the customer wants the comfort of retaining the automatic shifting features. Many builders don't know how to make the trans live with boost and still shift automatically, so they recommend a full manual valve body. We have automatic shifting TH400's in turbocharged applications approaching 1000 HP. We also cater to you Ford guys. If you need a stout TH400 for your Mustang, Lightning, or other Mod Motor or SBF, BBF combo, give us a call.
We prefer you call in before ordering so that we can help you select the transmission that best meets your needs. Each unit is custom built so not all available options are available on the checkout cart.
Our Stage I TH400's don't shift brutally hard, we are able to keep them reliable by using many of the features GM designed into them. Crisp shifts at part throttle progressively getting firmer with throttle. Very streetable and very reliable.
As with all Jake's Performance transmissions they include all new friction clutches, bands, steel plates, soft parts, filter, modulator (if applicable), as well as hydraulic upgrades, bearings added at several thrust locations, and other modifications depending on power level.
Street/Strip and Drag Racing TH400's
"Stage I" TH400 is a heavy duty rebuild with valve body and hydraulic improvements, rollerized rear thrust, heavy duty intermediate snap ring, and OEM pan. 450 HP/TQ capable but proven at much higher HP levels.
400-1A Auto Shift $1195
400-1M Full Manual Forward Pattern $1250
400-1RM Reverse Manual without engine braking $1350
Our Stage II TH400 includes all the components in the Stage I rebuild but is upgraded to a 34 element sprag and the corresponding direct drum, 6 clutch direct with carbon based frictions, 4 clutch intermediate, manual/automatic valve body or forward pattern full manual upon request. Aluminum Deep pan and additonal modifications. 750 HP/TQ capable.
400-2A Automatic Shift with manual downshift control
400-2M Full Manual Forward Pattern with engine braking $1500
400-2RM Full Manual Reverse Pattern without engine braking $1550
400-2RMEB "RockCrawler" Full Manual Reverse Pattern with engine braking $1650 400-2RMTB Reverse Pattern with transbrake $1700
400-2FMTB Forward Pattern Manual with transbrake $1800
400-2ATB Automatic Shift Forward Pattern with transbrake-$1850 400-2G10 Griner G10 Valve Body $2050
400-2G10B Griner G10B "Band On" Valve Body (great for turbo combos) $2100
Stage III TH400 has all the features of the Stage II but includes a billet input shaft, and forward hub. Deep cast aluminum pan is standard. 1000+ HP/TQ capable. The Griner Aluminum Transbrake with or without safe neutral is an optional upgrade.
400-3A Automatic Shift $1900
400-3M Forward Pattern Full Manual shift $1950
400-3RM Reverse Pattern Full Manual $2000
400-3RMTB Reverse Pattern with transbrake $2150
400-3FMTB Forward Pattern Manual with transbrake $2250
400-3ATB Automatic Shift Forward Pattern with transbrake-$2300
400-3G10 Griner G10 $2500
400-3G10B Griner G10B "Band On" $2550
Aluminum Direct Drum Option for Stage III TH400's. Add $550
Stage 4 TH400 has all the features of the Stage III but includes the 36 element Super Drum and alloy intermediate shaft for more reliability at power levels over 1000 HP.
400-4A Automatic Shift $2700
400-4M Forward Pattern Full Manual shift $2750
400-4RM Reverse Pattern Full Manual $2800
400-4RMTB Reverse Pattern with transbrake $2950
400-4FMTB Forward Pattern Manual with transbrake $3050
400-4ATB Automatic Shift Forward Pattern with transbrake-$3100
400-4G10 Griner G10 $3300
400-4G10B Griner G10B "Band On" $3350
Aluminum Direct Drum with 36 element Super Sprag Drum is optional. Add $400 to Stage 4 pricing.
2.10 gearset add $1400.
Stage 5 TH400 uses a Griner G20 billet Aluminum valve body and eliminates the intermediate sprag. Ultrabell is standard. Great setup for 1500+ HP combos.
Add $1450 for new Reid Racing Super Hydra 400 case on any 400 build.
Offroad and Rockcrawler TH400s
We offer a TH400 setup for Rockcrawler and off-road applications. This is similar to our Stage I build but uses a HD "K" case 4x4 TH400 core with a reverse pattern manual valve body that retains engine braking. 450 HP/TQ capable. $1550. We can upgrade this unit to our other level of builds as necessary for you big power off road guys.
Offroad Stage 2 400 This build is based on our standard Stage 2 build. It starts with a 4x4 core and HD case. We use a reverse manual valve body with engine braking, a wider 1.25" intermediate band for engine braking with HD material. A 34 element sprag, offroad specific clutch materials, lubrication modifications, and torrington bearing upgrades are added. $1800 Upgrades are available for bigger power combos.
Maximum Effort Offroad TH400
This build has all the stops. It is built specifically for the harsh conditions experienced in offroad competition.
We start with a new Reid Racing case for a bulletproof foundation to prevent stress cracks and case failure common when used in rough terrain and/or with a transfer case attached. We include a Reid Super Bellhousing and a new roller tailhousing (where applicable). The next key ingredient to this package is the spragless design used instead of the typical roller clutch or sprag design used for 2nd gear. This requires the state of the art billet aluminum Griner valve body to control shift timing and includes a direct drum assembly that eliminates the failure prone sprag. An important additional benefit of this design is the extremely strong engine braking ability. Most TH400's with engine braking rely on the OEM design 1" wide band. This does not, it uses the entire 2nd gear clutch pack to give the same capacity and strength to engine braking as it does acceleration. Additionally we use 300M input shaft with larger splines in the forward drum, 300M alloy intermediate shaft, and billet alloy steel forward hub. We add torrington needle bearings in several key locations to deal with friction and thrust loading caused during heavy deceleration.
We make several lubrication improvements, pump modifications, and other improvements to help with lubrication and cooling issues seen in offroad competition. As always, all new clutches, steels, bands, and soft parts. Clutches are specific design that we use for offroad builds. Custom length output shafts and planetary ratios are available.
6 month warranty.
Pricing begins at $7200.
Approximately a 2 week lead time is required on most transmissions. Our more common units (Stage I and Stage II) may be in stock.
Shipping fees are estimated based on pickup from Jake's Performance and delivery within the continental U.S. to a freight terminal or business with loading dock or forklift. Any other shipping methods will require you to call us for a quote.
JW Ultrabells (including Ford and Chrysler patterns), CSR SuperShields $315 with trans order, custom built Billet Converters from $600
2.10 ratio gearsets add $1900 to build price.
2.75 ratio gearet (6 pinion rear planet) adds $1000 to build price.
Electronic speedometer for late model conversions, and other options available.
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