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LS4+TF904?


CheapXJ
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although nothing special, I've had good experience with the tf904 (behind early 2.5/2.8 in XJs and MJs)

 

there were adapters available to mate it to a SBC.

 

ls4 is a modern 5.3L chevy LS v8 with a 60 degree bolt pattern that will bolt up to this trans...

 

 

anyone know how much boost the 904 can handle yet? :beerbang:

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My buddy had a 904 behind a 2.5 in a YJ and he grenaded it.......we ended up swapping in an AX5 and a clutch pedal.  Not sure why the 904 died, though.  I'd be a bit concerned putting it behind an LS:dunno:

 

Take that for what it's worth though, I'm not an auto trans guy.  Voodoo boxes, I call them.

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Something to consider, although the LS4 will bolt up to the bell housing it does not have any starter provisions.

 

The LS4 was designed to use a bellhousing mounted starter,  2.5l/2.8l Jeeps use a block mounted starter so fabrication and some creativity will be necessary to mount a starter on it,  this is a big reason that you don't see a lot of LS4 swaps.

 

 

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  • 4 weeks later...
On 2/1/2019 at 8:09 AM, mnkyboy said:

Something to consider, although the LS4 will bolt up to the bell housing it does not have any starter provisions.

 

The LS4 was designed to use a bellhousing mounted starter,  2.5l/2.8l Jeeps use a block mounted starter so fabrication and some creativity will be necessary to mount a starter on it,  this is a big reason that you don't see a lot of LS4 swaps.

 

 

the fiero guys made a bracket to swap the LS4 stock starter to pretty much anything and you make a 3"x3" square hole in your bellhousing where the bracket bolts on.

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I’m running a 904 behind a Cadillac shortstar in my crawler. Running a reverse manual valvebody. Haven’t had any problems with it. Wonder if you could come up with a starter that would mount on the bellhousing. Mine has the caddy starter with notched bellhousing. 

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