Auto Trans rec for my 5.7 EFI Swap

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tooslow

tooslow

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Hello,
My winter project is swapping a 5.7 Hemi into a 68 notchback Cuda. I am retaining the EFI with an aftermarket tune-able engine harness.
Question
I want an OD auto trans
I do not want to cut up the tunnel
> The Gear Vendor OD is too expensive at $3000
> 700R4 would be easy , I think?
> 4L80E needs a computer, some trouble, need a harness
Is there a Chrysler Trans that I could use with the 5.7 hemi that would fit with out much tunnel hacking ??????

I have done a search in both transission and this forum .
I find info on manual trans conversions but not to much on an Auto OD unit with a EFI Hemi

ANY HELP , POS OR NEG IS APPRECIATED !!!!
 
tooslow said:
Hello,
My winter project is swapping a 5.7 Hemi into a 68 notchback Cuda. I am retaining the EFI with an aftermarket tune-able engine harness.
Question
I want an OD auto trans
I do not want to cut up the tunnel
> The Gear Vendor OD is too expensive at $3000
> 700R4 would be easy , I think?
> 4L80E needs a computer, some trouble, need a harness
Is there a Chrysler Trans that I could use with the 5.7 hemi that would fit with out much tunnel hacking ??????

I have done a search in both transission and this forum .
I find info on manual trans conversions but not to much on an Auto OD unit with a EFI Hemi

ANY HELP , POS OR NEG IS APPRECIATED !!!!
Click to expand...
I found threads on the 42RH but they are pricey compared to a chevy . The 42RH might be skinnier than a chevy 700R4 ??
 
tooslow said:
Hello,
My winter project is swapping a 5.7 Hemi into a 68 notchback Cuda. I am retaining the EFI with an aftermarket tune-able engine harness.
Question
I want an OD auto trans
I do not want to cut up the tunnel
> The Gear Vendor OD is too expensive at $3000
> 700R4 would be easy , I think?
> 4L80E needs a computer, some trouble, need a harness
Is there a Chrysler Trans that I could use with the 5.7 hemi that would fit with out much tunnel hacking ??????

I have done a search in both transission and this forum .
I find info on manual trans conversions but not to much on an Auto OD unit with a EFI Hemi

ANY HELP , POS OR NEG IS APPRECIATED !!!!
Click to expand...
 
I found threads on using a 42RH, any thoughts on a 42RH behind a 2007 Hemi??
 
If you don't want to cut the tunnel, you dont have many options.
A GM 2004R is possible with minimal tunnel work and an adapter. My brother had one built to handle his 500hp 408 in his Dart Sport.
A 518 typically requires more work because its bulkiest right in the crossmember area but some have done it.

The Gear Vendors is the only thing that shouldn't require tunnel work.
 
The 42RH is the A500 IIRC. That is a fairly light duty trans. I would opt for a 518 (46RH) unless there were no other options.
 
The 42rh (A500) is essentially a 904 with an overdrive and the A518 is a 727 with an overdrive. The 904 has been proven if built can be a great transmission, there is no reason why the A500 can't be built the same.

Don't let the tunnel mods scare you off, because there are none, the folks that have done it have removed the upper hoop in the torsion bar cross member and replaced it with a piece of steel. US Car Tool also make the trans mount and they claim that no work is needed. I have the trans and the mount so I am going to be testing this soon.

The GM 200r4 is a great option and is what I was going to go with, however, you have to get a bellhousing (I think) and the trans cores were pricey. I got the A500 for $200. Both have great ratios.

Just do a search for 42rh and or 200r4 there are tons of swap threads.
 
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