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Thread: Nag1

  1. #1
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    Nag1

    Would a nag1 from newer say 2012 2013 Jeep's chargers etc work in an 05 magnum rt?

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  2. #2
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    Yes they will. It it happens to be removed from a Jeep or V6-equipped platform, it will have a higher stall converter.
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  3. #3
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    Yes, but if it comes from a V6 or AWD, then the bellhousing will not be correct. You will have to swap the bellhousing from your old one onto the V6 or AWD transmission. I am not sure if the Jeep also used a driver side starter like the AWD or not. If that is the case then it too will have to have the bellhousing swapped to fit in a RWD car.

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    Quote Originally Posted by Hemissary View Post
    Yes they will. It it happens to be removed from a Jeep or V6-equipped platform, it will have a higher stall converter.
    I've mainly been a manual car guy I'm not sure what high stall means. I was planning on getting a new one if I need to swap bell housing

    Quote Originally Posted by Rockhound View Post
    Yes, but if it comes from a V6 or AWD, then the bellhousing will not be correct. You will have to swap the bellhousing from your old one onto the V6 or AWD transmission. I am not sure if the Jeep also used a driver side starter like the AWD or not. If that is the case then it too will have to have the bellhousing swapped to fit in a RWD car.
    Thanks guys that's great news it'll help with choices lol

    I got a transmission from a gs300 and did the same thing swapped bellhousing and got a new torque converter into my ls400 so if need be I can do it again for my magnum.

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    Last edited by sin.hemi57; 01-12-2020 at 01:55 PM.

  5. #5
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    Quote Originally Posted by sin.hemi57 View Post
    I've mainly been a manual car guy I'm not sure what high stall means. I was planning on getting a new one if I need to swap bell housing

    Thanks guys that's great news it'll help with choices lol

    I got a transmission from a gs300 and did the same thing swapped bellhousing and got a new torque converter into my ls400 so if need be I can do it again for my magnum.

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    The torque converter is basically a fluid coupler between the engine and the transmission. The internals can be built such that they allow a higher rpm before they begin to move the vehicle. The heavier Jeep and the less powerful V6-equipped platforms benefited from a higher stall speed. Engines rev higher before moving. This create mechanical advantage that gets both platforms moving quicker / sooner.

  6. #6
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    Quote Originally Posted by Hemissary View Post
    The torque converter is basically a fluid coupler between the engine and the transmission. The internals can be built such that they allow a higher rpm before they begin to move the vehicle. The heavier Jeep and the less powerful V6-equipped platforms benefited from a higher stall speed. Engines rev higher before moving. This create mechanical advantage that gets both platforms moving quicker / sooner.
    I see the part number for the jeep and v6 nag1 torque converters are the same but I'm trying to figure out which torque converter the 6.4l cars with the nag1 one had so I can go that route. Any ideas? Thanks in advance.

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  7. #7
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    Quote Originally Posted by Hunter300c View Post
    I see the part number for the jeep and v6 nag1 torque converters are the same but I'm trying to figure out which torque converter the 6.4l cars with the nag1 one had so I can go that route. Any ideas? Thanks in advance.

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    ​6.1 unit with slightly larger pump casing. Lower stall than Jeep / V6.

  8. #8
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    Quote Originally Posted by Hemissary View Post
    ​6.1 unit with slightly larger pump casing. Lower stall than Jeep / V6.
    Great so the jeep/v6 one it is then. Is it plug and play or any modification needed? I have a 5.7l nag1.

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  9. #9
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    Quote Originally Posted by Hemissary View Post
    The torque converter is basically a fluid coupler between the engine and the transmission. The internals can be built such that they allow a higher rpm before they begin to move the vehicle. The heavier Jeep and the less powerful V6-equipped platforms benefited from a higher stall speed. Engines rev higher before moving. This create mechanical advantage that gets both platforms moving quicker / sooner.
    Ah gotcha makes sense

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    Quote Originally Posted by Hunter300c View Post
    Great so the jeep/v6 one it is then. Is it plug and play or any modification needed? I have a 5.7l nag1.

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    Nope; fill the torque converter (TC) first with new ATF+4 (level slowly drops - keep filling to midway up snout), carefully install and rotate to ensure you see / feel the spline structures of of engage (important before install; TC mounting flanges should be ~0.6-7" behind bell housing flange face).

    If you drive it aggressively and especially(!) if it has the three kidney-shaped lightening holes, carefully inspect the flex plate for stress fractures emanating from underneath the eight mounting bolts:



    If it is damaged, find an OEM 6.1L flex plate (they have no lightening holes).

    Finally, make doubly sure the alignment bearing is present and accounted for inside the rear of the crankshaft. Sometimes it remains attached to the previous TC's front alignment snout when the unit is removed (failure to have this critical centering device can be catastrophic)...
    Last edited by Hemissary; 01-12-2020 at 10:23 PM.

  11. #11
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    Quote Originally Posted by Hemissary View Post
    The torque converter is basically a fluid coupler between the engine and the transmission. The internals can be built such that they allow a higher rpm before they begin to move the vehicle. The heavier Jeep and the less powerful V6-equipped platforms benefited from a higher stall speed.
    Not just the stall speed but also the increased torque multiplication. (stall ratio)
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  12. #12
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    Quote Originally Posted by sin.hemi57 View Post
    Would a nag1 from newer say 2012 2013 Jeep's chargers etc work in an 05 magnum rt?

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    Were you asking on reddit yesterday?


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  13. #13
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    Quote Originally Posted by AnglerRT View Post
    Were you asking on reddit yesterday?


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    Yup

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  14. #14
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    Quote Originally Posted by Rockhound View Post
    Yes, but if it comes from a V6 or AWD, then the bellhousing will not be correct. You will have to swap the bellhousing from your old one onto the V6 or AWD transmission. I am not sure if the Jeep also used a driver side starter like the AWD or not. If that is the case then it too will have to have the bellhousing swapped to fit in a RWD car.
    Have you ever swapped the "bellhousing" on a NAG1? Because it's not a bellhousing like a manual car.
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