These kits are very useful for transmission swaps, or if you have a car that is very light or has a low rear gear ratio. Installation instructions governor recalibration kit. It comes with a bunch of diff weight weights, a bunch of springs, gov. Patc is on the cutting edge of performance rear wheel drive american transmission development. This governor shift point package is designed to allow easy adjustments for earlier or later shifting points. Th400 tranny problem shifting only at high rpms thread starter bartolucci. Setup is quick and easy with simatic pdmpa or ams and a handheld communicatorff. I think thats my problem but want to see what the signs would be before i start pulling stuff apart. If the software can be used from any computer other than the computer on which it is installed, you must license a copy of the software for each additional computer from which the software may be accessed. We have included the major changes and updates in the appropriate sections of this booklet. Normally the governor is in or near the tail shaft of the transmission. The coan governor recalibration kit will allow you to raise or lower, relative to vehicle speed, the points where your transmission shifts. This kit is very useful if you have a vehicle that is very light andor has a low rearend gear ratio to adjust the shift points to best suit your needs.
My th400 is on its third governor bat auto technical. The first calibration program i used was colorhcfr, which is a free software package that anyone can download, and supports a wide variety of sensors. Ct solutions ct0904 th400 governor gear repair kit turbo 400 transmission order only from seller ct solutions to assure correct and quality product. We decided to use one to modify our turbo 400s governor and improve its performance feel on the street.
For use with manual valve body th400 transmissions. Governor heres a quick rundown on the overhaul of the gm turbo. Sitrans th400 temperature measurement siemens global. The governor is located at the rear of the main trans case on the driver side on a th 350 and passenger side on a th400. Does anyone have experience tuning the shift points on their 700r4 trans.
I adjusted my th400 at the canister but its still shifting 12 a little early and soft at part throttle but at wot it will shift around 3200 rpm and its livable im going to do a little more fine tuning before i get on the road this evening and ill be looking at the kickdown plug and weather it has 12v to it thanks again everyone. Automatic transmission governor recalibration kits 700r4. Diy th350 governor calibration changing wot shift points from 4000 to 5000 had a noticeably affect on partthrottle shifts, probably because of how i have the vacuum modulator set. Fil02 modulators 465h modulator adjustable red stripe 6498 1 th350. This software cannot be loaded on a network server for the purposes of distribution or for access to the software by multiple operators. Default sorting sort by popularity sort by average rating sort by latest sort by price. The governor recalibration kit is designed for use in lighter weight vehicles with a low rearend gear ratio, or if it is a conversion. The vacuum modulator adjustment will have an effect too, though, and its easier to change. Woodward has incorporated decades of experience controlling engines and turbines into its suite of software products and tools. My 700r4 shifts way too early for my taste and for my engine.
Th400 governor gear repair kit turbo 400 transmission. The th350 was mainly factory installed with small blocks and the th400 with big blocks and high performance and heavier duty vehicles. The shift point package will service governors in the 700r4, 400, 350, 350c, 250 and 250c. B th350 and 700r4 remove the long clip holding the governor cover to the case and remove the governor cover. Governor recalibration kits from tci will allow you to adjust the shift points of your transmission. Lowreverse drum and components metal clad seals miscellaneous items oil pans and components output shaft support components overruning clutch assemblies and components. Bpt th 400 instructions for use manual pdf download. How to troubleshoot a turbohydramatic 400 transmission. Whether you need th400 wiring diagram information, th400 transmission rebuilders tips, th400 technical information, th400 diagnostics, th400 troubleshooting help, or just answers to your th400 transmission rebuilders question, the transmission rebuilders network is the place to go. Diy th350 governor calibration the 1947 present chevrolet. Th400 transmission troubleshooting help, th400 rebuilding. How to troubleshoot a turbohydramatic 400 transmission it. It was first used in buick and cadillac applications, and was quickly adapted to. Th400 transmission governor gear th400 transmission governor.
Patc builds gm performance transmissions in many levels. Grumpys site has limited th400 info just 1 guy rebuilt in 2008 and posted there. Th400 disassembly guide general motors introduced the th400 transmission in 1964. May 31, 2014 btw, on the th350, the governor cover is retained by the spring clip, and has an oring seal. After doing some research, it appears i need to recalibration my governor. Is used in th400 center supporttosun gear and is useful in adapting many size bearings. Th400 driven gears can have anywhere from 34 teeth to about 45 teeth. The adapter kits would contain a bolt pattern adapter, flex plate and starter, if necessary, to complete the engineside changeover. Th350400 shift point adjustment the 3 speed turbohydramatic 350 and its big brother the th400 were some of gms most widely used automatic transmissions from the mid 60s through the early 80s. Its cable speedo, vacuum modulated, non torque converter lock up, electric kick down. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, streetstrip, hot rod, street rod and towing.
The shift calibration takes a bit more work and description of the problem. Governor recalibration kit, gm, th350, th400, 700r4, kit. Th400 turbo 400 page 4 classic transmission solutions. There is a round sheetmetal cover over it thats held by a spring clip or in some cases just an interference fit on a th350 and by 4 bolts or a spring clip on th400s. Governor recalibration kit, gm, th350, th400, 700r4, weights, springs, seal. I am no automatic tech, but doesnt the th400 have the weights and springs for the shift points in the tailshaft or is that a ford i am thinking about. This kit will allow you to custom tailor your transmission shift points. Take the governor assembly to your workbench and proceed to step 2. In th350, th400, and 700r4 automatic transmissions, a governor controls part and full throttle upshifts. Tighten th400 governor cover bolts to 15 foot pounds.
Turbo 400 govornor adjustment don terrills speedtalk. Nov 29, 2010 what are the signssymptoms of a plugged governor on a th400 transmission. The governor turns in direct relation to the output shaft rotation, and therefore vehicle speed. Make sure the governor valve moves freely in its bore and weights move freely. For installation of the th400 into nongm cars, aftermarket crossmembers are available from many suppliers.
When swapping the th400 transmission into any vehicle, this kit makes installation of the transmissions kickdown feature a snap. The thm 400 transmission was first introduced in 1964 and was used through the 1990 model year with some engineering changes that occured during that time. The gear on the governor was worn enough that it wouldnt engaged the shaft. Proven to 2,000 hp present super street drag race on 10. The th350 and 400 depend on proper calibration to provide dependable operation and prevent unwanted failures. Proper installation of this kit can greatly improve peak performance and drivability of your vehicle.
Calibration software also allows the user to manage their calibration and asset data. Pictured here is a tool that allows removing the shift shaft seal without. The tv cable adjustment wont do it for this combination. Installs in a few minutes through the governor cover on your transmission. Gm th400 3l80 governor gear repair kit, 11 tooth, th400 heavydutyhphdthm. So, i figure that i need a new gov, or at least try the re calibration and that i cant hurt anything. There is a transgo shift kit in the th400 trans in my 63 gp. The governor has a set of fly weights like centripetal advance in a distributor. Shift points can be changed by lightening the governor flyweights and by buying a adjustable modulator currently contemplating building a switch pitch th400 for the marlin then regearing it to 3.
Governor pressure is similar to throttle pressure in that it is a derivative of line pressure but it is generated relative to the speed of the vehicle. If you need versatile datalogger support software for a variety of telecommunication options, manual data collection, and data display, pc400 can help. So, for example, you cannot have the relatively high rpm part throttle shift points of a corvette or camaro lt1 calibrated th400 at part throttle, and then have the relatively low rpm shift points of a c10 350 4 barrel calibrated th400 at wot. Governor heres a quick rundown on the overhaul of the gm turbo 400 governor. Proper installation of this kit can greatly improve peak performance and drivability of.
Sitrans th400 is available either with profibus pa or foundation fieldbus ff. Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. Th400 tranny problem shifting only at high rpms bat. What are the signssymptoms of a plugged governor on a th400. Gm th400 turbo 400 transmission governor gear repair kit.
Proper detent adjustment on 700r, 200r and aod transmissions is critical. Modifying transmission governor for higher wide open throttle shifts without any expensive kits. In order to minimize the amount of tuning required to dial in some hi po shift points, it would be nice to get a listing of other peoples springwe. Th400 transmission governor gear with roll pin th400 transmission parts, th400 atsg transmission repair manuals. Gm th400 3l80 1965up, 11 tooth governor gear repair kit, heavyduty, thmth400. I had to pull some idiot out of a big hole out offroading last night, and on the way home my transmission wasnt shifting right. Th350400 shift point adjustment hoosier state chevelle. The turbohydramatic 400 th400 automatic transmission can be found behind large, powerful engines on chevrolet and gm cars and trucks from the factory, as well as jeep, cadillac, oldsmobile and many others. If youve heard about the benefits of automated calibration and asset management but are puzzled about how everything fits together, call on fluke calibration for solutions. The gear can be replaced separately by removing the retainer clip on the governor shaft. You can do this job yourself without pulling the transmission. Patc sells transmission governors for 700r4, th400, th350, aod. Th400 governor assembly with gear, monster transmission.
If i change the weights to the governor in my th400, will it change the part throttle shift points. Install the governor assembly into the transmission. I first took the car to a trans shop to diagnose why my car wouldnt shift. I searched the net and this website for hours today.
I bought the car from a friend of mine and he said that he never had a problem like this. I was watching a classic car restoration program on youtube in which they were working on a 50s cadillac with an automatic transmission. As such, the wot shift points and the part throttle shift points will always be proportional. Btw, on the th350, the governor cover is retained by the spring clip, and has an oring seal. Automatic transmission governor recalibration kits gm. Thm 400 transmission, and is found in both passenger cars and trucks. Allows you to adjust the mph shift points for your transmission, even after it has been installed on your vehicle.
A gasket is supplied for th400 governor cover and an 0ring is supplied for th350 and th700r4 transmissions. This kit gives you all the necessary hardware to make the modifications and adjustments to the transmission governor. We work with different manufacturers in the development of stronger parts. My trans doesnt shift soon enough with the electric kick down connected im looking for it to shift between 5000 to 5600 full throttle with no change to the part throttle shifts thank you. Its located in the case right before the tailshaft. Just cant beat it best strength per dollar invested. On the th400, the governor cover is retained by four screws in a square pattern.
Think of the governor as a hydraulic speedometer, which tells the transmission when to shift up based on vehicle speed. Tci automotive offers a governor recalibration kit thats designed to allow owners to adjust fullthrottle upshift speed of any turbo 350, turbo 400, or 700r4 transmission. It is designed to support all common rtd, thermocouple, resistance and millivolt sensors. M will allow you to adjust the shift points of your transmission after it is installed in your vehicle. Th350400 governor mods in the previous issue i explained how the governor plays the major role in determining the automatic shift points in drive for th350 and th400 transmissions. The software products support the engineer throughout the control system lifetime, from creation to simulation to runtime operation to viewing and troubleshooting. Th350400 governor mods hoosier state chevelle association. Remove the governor assembly to your workbench and proceed to step 2. This is a factory replacement governor assembly for a turbo 400 transmission. While the unit is indeed one of the stoutest of its kind, trouble can. The th400 in my 1976 cadillac is on its third governor. Another trick is to remove the one heavy spring and just use the one lighter spring. Th400 governor gear repair kit turbo 400 transmission 196598. View and download bpt th 400 instructions for use manual online.
The drive gear is part of the governor assembly which is located inside the oil pan. If the rear axle ratio has been changed or the trans originally came from a different vehicle, the governor calibration is probably off and should be changed. Th400 and 700r transmissions are controlled by the governor. Sep 14, 20 ive got an 89 v2500 burb with a 350, th400, np241 combo. While the unit is indeed one of the stoutest of its kind, trouble can still occur. Tci governor recalibration kits 326500 summit racing. I have searched the hamb and online and dont find any instructions. The governor parts are interchangeable, but the gears are different between these models. Patc gm performance transmissions, th400, 700r4, 4l60e, 4l80e, 6l80e, 2004r and others. Th350 th400 700r4 250 transmission governor springs. A bad governor gear will result in sudden loss of upshift. Hard parts free delivery possible on eligible purchases.