AMC 360 to GM Transmission Adapter

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Part Number:437AMC-3

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What's that you say? You want Overdrive in your FSJ? Until now, that was a pipe-dream. But dream NO MORE! We now carry AMC Engine to GM Transmission adapters for FSJ's! Can you say 700-R4? I thought you could......can you also say TH350, TH400 and 4L60E? Great, now it's time to say SEND ME THAT PART! This will also work with the 4L80e (must use the torque converter with the TH350 pattern and, of course the controller). Also fits 4l65e (aftermarket stand-alone controller required for 4L65e applications).

**Note: works with AMC starters (note that some applications will use a different AMC starter, which will be noted in the instructions).

**Transmission Fitment Notes:

The electronically controlled early 4L60E and the 4L80E will require a separate, stand-alone transmission control unit
The 4L80E can be compatible with this kit, but must use a modified factory 4L80E torque converter that features the TH350 pads / bolt pattern for the provided flexplate (AMC flexplates do not have the diameter required for the large hole / pad pattern native to the factory 4L80E)
The later style 4L60E and 4L80e with the removable bellhousing / hex rear bolt pattern are not compatible for this conversion
The TH350 is the only candidate for 1972-1983 CJ5 Jeeps due to their length, and these Jeeps must not have excessive lifts
Will NOT work with 6L80e applications.

Great product

Got this 2 years ago and had a shop swap in a 700r4 with this adapter. They were happy with the quality but needed a little fab to make the bolts easier to get to for the starter. Daily drove the Jeep with this setup for 2 years and it has been great.

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Reviewed by: (Verified Buyer) Zachariah Oeding from Greenville, NC. on 8/19/2021

Q: Will this adapter fit with 4L65e? I have AMC 360 engine and looking to swap.

Asked by: Ana - 3/11/2016

A: Yes, this also fits the 4l65e, but an aftermarket stand-alone controller is required.

Was this answer helpful? 3 of 4 Customer(s) found this Answer helpful.

Answer provided by: Ryan (3/14/2016)

Q: Will these overdrive transmissions work with the stock transfer case?

Asked by: anthony sorola - 6/12/2017

A: You can't use the overdrive transmission with a stock AMC tcase, unless you run an adapter from the transmission to the transfer case.

Was this answer helpful? 3 of 3 Customer(s) found this Answer helpful.

Answer provided by: Ryan (6/13/2017)

Q: With this flywheel what starter is required? I want a starter with solnenoid on starter.

Asked by: karl - 3/31/2017

A: This adapter will use an AMC starter, and the instructions will specify which ones can be used.

Was this answer helpful? 1 of 1 Customer(s) found this Answer helpful.

Answer provided by: Ryan (3/31/2017)

Q: Hi, I have a 2004 4l65E I would like to bolt up to a 78 AMC 360. Is this the correct adapter for the application? I understand I will need a stand alone controller. Thank you.

Asked by: Ty - 8/11/2021

A: Correct, it fits 4l65e (aftermarket stand-alone controller required for 4L65e applications).

Was this answer helpful? 1 of 1 Customer(s) found this Answer helpful.

Answer provided by: Amanda (8/12/2021)

Q: Do you folks know if this adapter could be used to work with AMC 360 to Dodge trans? Or can it be re-drilled to make it work? (same bell housing as the NV4500 and G56)

Asked by: Brian - 1/22/2017

A: No, these are only made to fit the GM transmissions. While you could probably weld in the existing holes and redrill for a different pattern, the spacing would be off and most likely would ruin the trans (not to mention voiding the warranty on the part itself).

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Answer provided by: Ryan (1/23/2017)

Q: I have a GM TH400 fitted to a 360 which was part of a 4x4 set up its now been converted to a two wheel drive set up I've noticed that the rear g/box mounting does not fit squarely on the chassis ie there is a slight twist in the alignment when the engine is fitted in its mounts will this adapter correct this offset? Chris

Asked by: Chris Champion - 6/19/2017

A: This adapter aligns the 360 to the TH400 properly. If you have twist, that could be from the motor mounts or towers not being perfectly aligned or worn out.

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Answer provided by: Ryan (6/19/2017)

Q: Hi There, Writing from Australia. Looking to dyno run freshly rebuilt AMC 360, will be using a gm turbo bolt pattern bell housing. Will this adapter be suitable? After testing will be fitting back to original TF727 in car... If this adaptor is sutiable, is this the only part I will need to mate to the gm bellhousing? Cheers!

Asked by: Zach - 10/29/2018

A: Yes, based on your use this is all you'll need.

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Answer provided by: Ryan (10/30/2018)

Q: who makes this conversion? and does it offer a dust shield or an shield plate?

Asked by: Jeff - 1/9/2019

A: That kit does include a dust shield!

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Answer provided by: Ryan (1/10/2019)

Q: Will this work with a rebuilt 1970 AMC 360 going into a 1991 GW w/ TH 400 transmission? 1970 motor has older crank shaft. Thanks Don

Asked by: Don Floyd - 8/20/2021

A: Yes, this will work with that!