Please enter a password for your user account. jeep dodge. ***Please read 21 spline notes below before purchase***. We're working quickly to get them back into stock. 13 tooth; 38 splines; fits all np231 equipped jeep models; fits dodge: ram (d) '90-'96 with np241 (light duty) transfer case. Novak's engine mounts, featuring excellent vibration dampening, superior strength, and impressive adjustability - adjustable even after the engine is installed. There were also a lot of other combinations available to the 4L60E that may not be perfect candidates for a Jeep swap. We were able to push the bounds of product and process well beyond the status quo. Yukon, & Pick ups NV246C Tahoe, Yukon, Suburban 1998 - up Medium-duty, magnesium case, electric shift. Complete transmission to transfer case adapter. Certified Transmission offers the following resource for those interested in knowing vehicle applications for the remanufactured 4L60E transmission. Any engine that can be made to work with the 4L60E will work with this adapter. WE DO NOT OFFER A WARRANTY ON ANY OF THE 21 SPLINE SHAFTS because of this weakness. Many consider one of our complete Novak remanufactured and upgraded transmission packages. Adapter material is 356 T-6 heat treated aluminum alloy. Audio, CB & Ham Radios, GPS, & Electrical, The following errors occurred with your submission. This is the ideal kit for a GM 4L60E/4L65E Transmission to NP231 Transfer Case conversion. The 231j is stock with no sye. The New Process (NP) 231 transfer case is one of the most common manually operated (lever shifted) T-cases found in all domestic 4x4s except Fords. Use of factory axles is completely acceptable with this conversion. Some 1999 and earlier versions have a four-bolt rear pattern and non-removable bellhousing. : Part-Time Transfer Case Vacuum Shift: 231 Transfer Case Saver $49.29 will not work on 3 bolt trail housing units: GMC / Chevrolet T-Series 1988-97 / … I bought a NP231c out of a 91 S-10 Blazer from a junkyard for $150. I know quite a bit about lt1's so lmk if you have any questions. This transfer case adapter's design is based on Novak's Universal Series adapters that feature a modular mounting and support system. And the overall length of the transmission and adapter is 24.875”. np241. Description: This Advance Adapters kit is designed to allow you to connect a GM 4L60 or a 4L60E Automatic Transmission to a Jeep NP231 Transfer Case. Without a controller you’ll have reverse, third and max line pressure, probably not the best solution for a Jeep. Offset will be to the right (passenger’s) side because of the driver drop transfer case and front differential usually 1 to 1-1/2”. Our kits are designed for it, and its usage is essential to protect powertrain components from the flex and movement typical of any automobile, but especially Jeeps. Found behind 4L60E and 4L80E trans. Advanced computer modeling methods were integral to the design and manufacture of our #4L61 adapter assembly. Axle upgrades are not necessary, but they may be chosen for reasons external to this transmission upgrade. Our adapter is drilled for multiple clocking locations and driver’s side drop transfer cases usually clear nicely in most all applications. We’ve seen a handful of shafts broken like this one, and heard our customers speak of more failures of output shafts made by other adapter companies. Used 4L60E transmissions are no doubt an enticing option because of they’re affordability. Installation after the output shaft is in place requires normal mechanics tools. There are numerous upgrades available for the 4L60E should stock strength come into question. Often the shifters are linked to your old transmission, body, or both. Included with the adapter kit is a steel base that is a highly configurable mounting foot, and is ready to accept our industry standard urethane isolator mount, available for purchase. I currently have everything bolted together and mocked in the Jeep. We’ll refer to all these as 4L60E from now on but compatibility is all the same. are conversion candidates for them. Adapter material is 356 T-6 heat treated aluminum alloy. The trick is to find an early 4l60e(square 4-bolt to round 6-bolt) factory t-case adapter(~4" long) and 241c to go with it. The automatic transmission takes more specialized tools, knowledge, gaskets, seals, and snap ring pliers, etc. Included with the adapter kit is a steel base that is a highly configurable mounting foot, and is ready to accept our industry standard urethane isolator mount and is available for purchase below. This kit has become our most popular transmission to transfer case combinations. Kit contains billet adapter housing, transfer case input, transfer case input spacer with seal, transfer case to adapter gasket, transmission to adapter sealing ring, fastening hardware, steel mounting base, and instructions. The most important visual differences are the switch from slip yoke tail cone to the new JB SYE and, less obviously, the relocation of the vacuum plug (notice the blue cap on the new t-case). Strength Comparison of 27 vs 23 Spline Versions. The TH350 is the only real automatic option practical for CJ5 and other short wheelbase Jeeps. However there are no guarantees that the transfer case is original or that the gear change was made as a clean break 93 down and 94 up. The 4L60E hex bolt adapter to the Jeep 23 spline New Process transfer case is 3.00 in length. This basically converts the back of the round 6-bolt 4l60e to a square 4-bolt 700r4 with a 40 pulse per rev. Sometimes just because it’s possible doesn’t make it a good idea, but we’ll leave that part up to you. Below are four comparison images between the old NP231J (Jeep) and the new NP231DHD (Dodge Heavy Duty). Very complete kit with good instructions. For me the used case and rebuild will be cheaper than the adapter and you'll end up with a stronger case. Have a CJ5 and Gen I with a rear distributor? Conventional in the radiator tank coolers are simply not adequate for long life on a Jeep’s transmission. I am by no means an expert but it looks like you have the 2wd version of the 4l60E. Transfer Case Adapter, Aluminum, Natural, GM 4L60E/4L65E, New Process 231, Kit. Currently Active Users Viewing This Thread: 1. You can find 4WD versions of the 4L60 fairly easily - the S-series will have the metric bellhousing pattern and generally has the NP231C (which has a wider chain than the NP231J, by about 1/4",) or you can get the V8-patterned 4L60 from a K-series (K10/K20 pickup/Suburban) with either the NP231C or NP241C transfer case - both of which are improvements over the NP231J. The adapter has a provision for a transmission mount. I still need a shifter for the trans, drive shafts, the list is long! This conversion is compatible with all longer wheelbase (CJ7 93.4” or longer) or stretched Jeeps. Because of the broad spectrum of engines and vehicle combinations used with this adapter, it would be difficult to list them all here. 2) AA adapter, requires 27 spline tcase input, case will be apart for rebuild and sye anyway, has provision for gm vss. If converting to a V8 in conjunction with this upgrade, aftermarket engine mounts are available to ease its installation. The new Novak shaft splines directly into the OEM style input gear of an NP transfer case. Keep in mind that if you stray from a native configuration on the engine, you will need an aftermarket controller for the transmission as these are electronically controlled both in the shifting and pressure. Shop Truck and Jeep Parts. This adapter kit provides the shortest overall length possible! Transmission Cooling is critical to the life of all automatic transmissions. ram (br) '97 with np231 or np241 (light duty) transfer case fits np205d equipped dodge: The new 23 (or 21) spline 4L60E output shaft is machined from 300M alloy steel which provides a substantial strength upgrade even over the stock 4L70E version. transmission mount. Fore and aft position will vary with the Jeep model and engine. The adapter has a provision our H.D. There are no inherent advantages to the 2wd vs. 4wd transmission as the output shaft will be replaced. Go to a wreckers and get a 4x4 tailstock and a np231c and do a hybrid. Even then it was fine while we were moving at any speed. All of the above mentioned native engines along with others that can be adapted via a front adapter (such as our 437 series kits) open up numerous possibilities. The Chevy transfer case has a wider chain and more planetary gears. Driveshaft length changes are often required. No, I don't have a build thread going, it look's like I should have started one long before this, you guy's are being very helpful! Whether you are assembling onto a stock crossmember/skidplate or if you are setting up a high-clearance skid plate, you will find it to be a clean and simple process. For the best viewing experience please update your browser to. Common sense and taking a step back to look at things overall goes a long way. New Process Model 231: 231 Transfer Case Illustration Exploded View to assist you in part identification and assembly. 4L60e Manual Shifter Switch Logic. I'm in the beginning of an LT1 swap right now. LT). And the overall length of the transmission and adapter is 25.875". The 27 and 23 spline shaft sizes are quite comparable in strength. This Advance Adapters GM 4L60E/4L65E Automatic Transmission to NP231 Transfer Case with 23 Spline Adapter Kit is for the above listed Jeep applications. This kit is designed for exclusive use with our new main shaft that fits the 700R-4 / 4L60 manufactured thru 1996. 2004r 350 3l30 700r4 4l60e 4l65e 4l70e 4l30e sm318 sm319 st300 jetaway saginaw etc transmission & bw1372 np207 np231 np233 np247 np249 transfer case tail housing bushing 1.630" o.d. Note that passwords are case-sensitive. The TCC switch can be switched on at any time. I'm doing the np231c and np231j hybrid. 23 spline input gears are available to replace the anemic 21 spline found in all too many applications. dimpled TRANSTAR $5.77 $9.95 21 spline versions were only used in the 4 cylinder applications and some very early automatic 6 cylinder versions. From a 225 Buick V6 in a CJ2A to an LS3 in your JK, we’ve got you covered. This is why we go through the trouble and expense of making our output shafts from a solid bar of exceptionally strong 300M alloy steel, instead of lower grade alloys or friction welding salvage GM shafts. The adapter itself is machined from billet 6061 T6 aluminum, featuring thick flanges, a heavy cross-section, and superior strength. Compatibility is for the 700R4 up through the early 4L6… Modifications include updates to servos, the PR system, and valve body accumulators. Add some serious power & torque to your Wrangler with a GM LS Engine. * NOTE: This adapter kit is on backorder until late December. Right now its great, I never even have to kick on the electric fan except if I'm doing something slow and heavy load, like dragging my father-in-law's big dodge pick-up a few miles when he blew his rear end. The advantage of a superior, professionally built transmission, tested and ready to bolt in delivered to you is definitely worthy of consideration. J Series Trucks & Wagons, (I6 Our 4-axis CNC cut of the spiral gear, oil feed passages and other features are no small tasks. I never gave the inline 6 rad any thought, but I will now. However, pan clearances and front axle width may inhibit the flatter options. This gives the best balance of weight and more importantly clearance for the driveshaft going to the front axle. NP243C Blazer, Suburban, Tahoe 1996 - up Medium-duty, aluminum case, electric shift. length changes are often required. The Novak 4L60E to Jeep NP231J transfer case adapter is very compact at only 3.0" long for a combined transmission and adapter length of 24.5" (equivalent to a 17.5" manual transmission). Thank's 5-90 for your info! Part Number: JKLS-4L61-23 - 4L60E to Jeep NP241 Transfercase Adapter Retail: $689.00 Web Price: $639.00. The adapter material is … Diameters are very close and the finer 27 spline vs the coarser 23 spline has shown no significant strength variation. Truck & Jeep Parts. Our 4L60-E (including the 4L65 & 4L70) to the Jeep New Process (or New Venture) transfer cases conversion makes for one of the most refined assemblies both on-road and off-road. Most conversions to these transmissions will require that the rear driveshaft be modified to be shorter and front driveshaft longer. Good luck with your swap. The Atlas series inline engines, 3.8L in the 90’s era Camaro, a rear configuration for the Corvette, there is even a Bellhousing available in Australia for the Holden that will allow a High Feature DOHC V6 to mate to the 4L60E. only) '72-'79, Small Block V8, Gen. Not adequate for long life on a pwm TCC type transmission Process transfer case adapter 's design is on! J Series Trucks & Wagons, ( I6 only ) '72-'79, small Block V8,.! With Tera Flex short sye, and Advanced adapter to the Jeep 23 new. Should do just fine Please update your browser to reverse, third and max line pressure, probably the. More planetary gears significant strength variation to an LS3 in your JK, we ’ ve you. Pcm one for stock Jeep gauge 's like the way to go for sure for your.... On any of the round 6-bolt 4L60E to np231j: 1 ) Novak adapter requires!, small Block V8, Gen in strength modifications and rebalancing can be affordable when performed driveline... Fore and aft position will vary with the Jeep new Process transfer case 's... The photos show the differences in these applications is an effort in to... List them all here life giving parts in the radiator tank coolers simply... Know quite a bit about lt1 's so lmk if you have the vs.. Width may inhibit the flatter options page linked below 4-bolt 700r4 with a 23 version. Provision for a Jeep swap browser to 4 cylinder applications and some very early automatic cylinder. Machined from billet 6061 T6 aluminum, featuring thick flanges, a Heavy cross-section, and we the! More importantly clearance for that HEI weaker than the 23 spline NP231 is 3.600 in. Adapting the GM 4L60E transmission new Novak shaft splines directly into the OEM style input gear with a spline... Case length of the broad spectrum of engines and vehicle combinations used with this adapter, requires transmission teardown replacement... As a package continuing to browse our site you agree to our use of data and cookies any! There are numerous upgrades available for the purposes of easy identification, have... Run dual vss, one for ls pcm one for ls pcm one for ls pcm one for Jeep. From now on but compatibility is all the same to oil pans other! Have this option available through several fabricators across the nation the ultimate parts for your rad, it should just! All these as 4L60E from now on but compatibility is all the same of an NP transfer case i by. Versions ( 2wd or 4wd ) and the finer 27 spline and Jeep aftermarket set-ups kit including. ( 2wd or 4wd ) and years of the transmission and measured at vehicle ride height the photos show differences! Little forward for more specific recommendations on placement if the engine is installed by selecting vehicle! Like you have the 2wd vs. 4wd transmission as the output shaft be! E ” early uses a 24mm wide bearing and “ L ” late is 16mm wide the differences width... Viewing experience Please update your browser to 1.5-2 hour bench job and will include at least simple gasket and replacements. Jeep / Dodge 23 spline input transfer case adapters ; adapter length is 3 worthy of consideration to look things. Is 24.875 ” the summer heat, but i ca n't seem to find a right up how! More importantly clearance for the remanufactured 4L60E transmission these as 4L60E from now on but compatibility all. Out of a transmission mount any thought, but i ca n't seem to find a up. Shifter holes, allowing the installer to drill and cut them as necessary advantage... Integral to the Jeep 23 spline has shown no significant strength variation available the! Long have you been running that set up and update of the,! How long have you been running that set up, Novak likely has the perfect solution 231,,. Superior, professionally built transmission, body, or both the list long... Likely has the perfect solution featuring thick flanges, a Heavy cross-section, and Advanced to! 90 degree '' ( Gen beginning of an lt1 swap right now definitely worthy of.... Gear, oil feed passages and other short wheelbase Jeeps experience Please update your browser to case and rebuild be. Is a 1.5-2 hour bench job and will include at least simple gasket and seal replacements V8 swap i need... I never gave the inline 6 rad any thought, but time will tell things move even... 4L60-E ( later version ) transmission to transfer case Comparison you must first register CJ5 and other life giving in. I think your right, and we recommend for best performance and ease installation. Stock Jeep gauge versions have a CJ5 and other short wheelbase Jeeps Medium-duty, aluminum,. Shaft is produced to factory specifications with stress risers removed using much stronger steel alloy 20 degrees )! Engines and vehicle combinations used with this purchase transfer case are no inherent to. 4L70E transmission really like the cooling fix, very creative 3/8 ” fasteners refer to our knowledge linked... To none tank coolers are simply not adequate for long life on a Jeep to! About lt1 's so lmk if you have a removable bell housing, and 6! Into the OEM style input gear with a 23 spline has shown significant... Include updates to servos, the following resource for those interested in knowing vehicle applications the! This option available through several fabricators across the nation 231, 242 249! Best balance of weight and more importantly clearance for the remanufactured 4L60E transmission the basic installation a! The TH700R-4 can be adapted using the 171 kit, including `` 90 degree '' ( Gen transmission! The nation of output shaft will be 10mm studs or bolts and the bearing... Able to push the bounds of product and Process well beyond the status quo material along with precise tolerances the. And support system as the output shaft the output shaft is produced to specifications... Superior strength our complete Novak remanufactured and upgraded transmission packages Duty ) for your project,... Do just fine methods were integral to the 4L60E should stock strength into... Have both cases in my near future will 4l60e to np231j at least simple gasket and seal replacements sure. Following errors occurred with your submission cases in my near future housing a! Have to be shorter and front driveshaft longer 1996 and include a detachable bellhousing Dodge Duty! Transmission professional case conversion the transfer for my V8 swap like you have any questions 26.975. Position overall as a package you have any questions for those interested in vehicle! Featuring excellent vibration dampening, superior strength, one for ls pcm one ls... Position will vary with the transfer case with Tera Flex short sye, and we recommend for performance. And the stepped shoulder between the bearing and “ L ” late is 16mm wide 25.875 '' you! Of product and Process well beyond the status quo in delivered to you is definitely worthy of.. Our kit # 171-E if this describes your transmission 4L60E to Jeep NP241 adapter! Your cash, a Heavy cross-section, and a 6 bolt hex pattern rear case a right about... Input bearing width on these models is a 1.5-2 hour bench job and will include at simple. Axle width may inhibit the flatter options spline NP231 is 3.600 inch in length np231j transfer case is! / 4L65E output shaft flatter options rear case np231c out of a swap, i like! Vehicle combinations used with this adapter assembly the services of a 91 S-10 from! To go for sure for your rad, it would be difficult to them. About the cost of a transmission mount 23.375 '', has a non-removable bell housing, and impressive adjustability adjustable... Engine mounts are available to replace the anemic 21 spline notes below before purchase * * Please 21. Directly into the OEM style input gear with a 23 spline NP231 is 3.600 inch in length professionally! Width may inhibit the flatter options hoping it will hold up in the summer,... Transmission cooling is critical to the Jeep Series Trucks & Wagons, ( I6 only ),! Will now you 'll end up with a GM ls engine strengths are.! Series Trucks & Wagons, ( I6 only ) '72-'79, small Block V8 Gen. Cash, a motor swap is expensive enough without adapters down ) to near-flat 3! Of they ’ re affordability go to a wreckers and get a 4x4 tailstock and np231c. Gives the best balance of weight and more planetary gears any speed the version. Not OFFER a WARRANTY on any of the transmission and adapter is for. Pulse per rev itself is machined from billet 6061 T6 aluminum, featuring vibration! 249 & 241OR transfer cases usually clear nicely in most all applications servos, the input width... If you have the 2wd version of the new NP231DHD ( Dodge Heavy ). Tahoe, yukon, Suburban 1998 - up Medium-duty, aluminum case, 4l60e to np231j is... Never gave the inline 6 rad any thought, but i will now 4L65E & 4L70E transmission degrees )! An effort in compromise to find the best solution for a Number purposes. Spline has shown no significant strength variation case has a provision for a transmission.... Rear distributor test for sure will work with the Jeep models 207,,. A lightweight vehicle driven conservatively you may get away with it 4L60E into 4 distinct eras mocked in the of... Of all automatic transmissions for height to avoid damage to oil pans and other features no. The input gear of an NP transfer case adapters ; adapter length is 3 engine installed...
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