NP435 transmission with AMC bellhousing


AMC I6 & V8 Engines


Ford Style Transmissions

Conveniently, no adapter is required to marry Ford truck transmissions to some AMC bellhousings. Procedure and available parts are detailed below.

Compatible Engines

All AMC I6 & V8 engines made from 1972-2006 are compatible with the above bellhousings and therefore this conversion, including the 232, 258 & 4.0L I6 as well as the 304, 360 & 401 V8's. Earlier AMC V8's may be compatible; details below.

Compatible Transmissions

All of the Ford “butterfly” style truck transmissions are compatible without modification using this bellhousing. The Jeep T18 has only one bolt hole different, the bolt near the clutch fork is higher on the Jeep version. Usually the OEM bellhousing has both patterns in that era.

Compatible Bellhousings

The OEM 1976-1979 T150 & T18 bellhousing as well as the 1980-1986 T176/T177 bellhousing will work as they came from the factory with the Ford transmissions patterns already.

The SR4 / T4 /T5 bellhousing is similar but uses a different bolt pattern. It is possible to modify it by welding holes closed and re-drilling the pattern, but best to start with the right bellhousing instead. SR4 / T4 / T5 bellhousings lend themselves to a GM transmission with some minor machining. See this page for SM465 or this page for SM420 information.

AMC Bellhousing

AMC bellhousings in 1972-1975 CJ's and other trucks are incompatible due to their longer depths and transmission face bolt patterns. No bellhousings after the 1986 CJ models are compatible.

Available Bellhousings & Kits

Both new and good used bellhousings are available, featuring the correct bolt pattern for Ford "butterfly" pattern transmissions, such as the T18, T19, NP435, etc. All Novak bellhousings (new or used) are dialed in to true concentric center, since all other aftermarket bellhousings are poorly centered, and AMC engines offer no corrective dowel pins as a remedy.

Bellhousings are available solo, or kitted. Used bellhousings are deep cleaned and vapor honed for a terrific new look.

Kitted bellhousings in new or used versions come with new: clutch release fork, boot seal, pivot ball, and retention spring.

  • Bellhousing, Jeep AMC to T150 & Jeep T18, 1976-1979 & T176, T177, & T178 1980-1986, #8133951

  • Bellhousing, Jeep AMC to T150 & Jeep T18, 1976-1979 & T176, T177, & T178 1980-1986, good used

  • Kit 8133951-K, bellhousing for AMC Jeep engines to Jeep T150 & T18 transmissions, 1976-1979 & T176, 1980-1986, with clutch release arm

  • Kit 8133951-K, Bellhousing for AMC engines to T150 & T18 transmissions, 1976-1979 & T176, 1980-1986, with clutch release arm, boot, ball, spring. Good used

Early AMC Cranks

early_amc_crank_flangeNot all AMC crank flange bores are the same. Early engines, 1971 and previous - as well as those with automatic transmissions around this era - featured a ~1.8" step (see image to the right) or a shallow recess instead of a ~1.8" centering bore as found on later AMC V8 engines. This distinction is important to make if adapting to a transmission where the pilot bushing is positioned further rearward due to a shorter input shaft length. All early and late cranks (in our documentation) feature a pilot bushing bore (the deeper bore in the crank) that is just over 1" in diameter whether they have the above step-bore, or not. On the later engines you are placing the pilot bushing where an automatic transmission would normally index the torque converter. Also be aware that on AMC engines originally equipped with a TH400 automatic transmission there may be a thin centering ring that will need to be removed to install the larger pilot bushing. If the bore measure ~1.7” instead of the expected ~1.8” you’ve got the bushing that needs to be removed. That ring 5352374 is located here.

Related Products

Early AMC to Ford pilot bushing
AMC to Ford pilot bushing
Hydraulic release slave kit for AMC
Hydraulic release master kit for Jeeps
Hydraulic release master kit for Jeeps
Adjustable release bearing for AMC
AMC to Ford clutch kit
Ford Clutch Disc

AMC Bellhousing CPS Machining


We'll CNC machine the accurate Crank Position Sensor (CKP) location required for your 4.0L engine into your classic AMC Jeep bellhousing. Send your sensor, or we can supply one. Send in your bellhousing *clean*. If this is not possible, we'll steam & detergent clean it for you for $50. If we are already machining your bellhousing face, the cost of the CPS machining procedure is reduced. Call in for details or a quote.

As viewed from the rear of the engine, the early 1992-2003 sensor position is about 10 o’clock (image, shown) and the later 2004-2006 is about 3 o’clock.

Does not apply to AMC 2.5L applications. These conversions are seen here.

Machining, bellhousing, machine CKP sensor in 10 o’clock position

Machining, bellhousing, machine CKP sensor in 2 o’clock position

Installation Requirements

This conversion typically bolts in just like a stock transmission would. The same tools and procedures would apply. If adapting engine, transmission or transfer case, consult the appropriate page for that information.

Also See