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Last Free Man
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Discussion Starter · #1 ·
Trying to determine what automatic transmission will bolt between amc v8 and dana300.

What is considered the best transmission for this combo?

I think the tf904 and tf999 are light duty and tf7272 is heavy duty, right?
Is there any other trans that will bolt up?
 

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Premium Member
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4,651 Posts
Use the 999. It actually is called a Torque Command in the AMC/Jeep applications. It will hold up to your use, if correctly rebuilt and with the line pressure upped a little. I have one on my Scrambler behind a 380Hp MoPar 360, and it hasn't flinched.
 

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I am the law.
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29,823 Posts
Use the 999. It actually is called a Torque Command in the AMC/Jeep applications. It will hold up to your use, if correctly rebuilt and with the line pressure upped a little. I have one on my Scrambler behind a 380Hp MoPar 360, and it hasn't flinched.
Agreed. The 727 is easy to use as well, but the 9xx series was actually used in CJ's, so you don't have the front driveshaft clearance issue to deal with that the 727 presents.
 

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Last Free Man
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Discussion Starter · #4 ·
Thanks for your input. I currently have a 904, would the 999 be considerably better, or should I just leave the 904?
 

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AKA GreyShrink
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I have a TF999 between my AMC 360 and a Dana 300. It is somewhat heavier duty than the TF904, and i believe the first gear ratio is slightly lower.
 

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Are you sure it is a 904? What did it come out of? 999, 998 and 904 are all the same trans, externally. The difference is that the 998 and 999 had higher torque ratings, due to extra clutches, and the 999 had a lower first gear. (2.74, as opposed to 2.45 in the 904)
 

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hug life
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10,197 Posts
i run the 999 konrad, works great behind my high powered 258!

It is making some sweet noises when i get on the gas to kick down the gear, but thats a whole nother thread :(

by the way your a **** :)
 

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Last Free Man
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Discussion Starter · #8 ·
Are you sure it is a 904? What did it come out of? 999, 998 and 904 are all the same trans, externally. The difference is that the 998 and 999 had higher torque ratings, due to extra clutches, and the 999 had a lower first gear. (2.74, as opposed to 2.45 in the 904)
That's what I was told, but the owner wasn't quite sure either.

It's currently in a cj8 between 258 and d300.
 

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Pretty sure it is a 999. The one in my Scrambler is made from the original guts for the Jeep's trans, with a small block Chrysler 904 case that I got from a trans shop's core pile.
 

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Last Free Man
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Discussion Starter · #10 ·
Is there a way to tell without taking it apart?
 

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Premium Member
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If it was from a 258 Scrambler, it is a 999.
 

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Size Matters (.)(.)
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I have the TF727, and I love it. It does have driveshaft clearance issues, but if you are careful you dont have to worry about it. I would recommend about 6" of lift though. :thumb:
 

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I have the TF727, and I love it. It does have driveshaft clearance issues, but if you are careful you dont have to worry about it. I would recommend about 6" of lift though. :thumb:
Not worth the trouble.

I was originally going to use a 727 when I swapped the MoPar engine in, but the driveshaft issues and too tall first gear convinced me it would be a mistake.
 
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