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Hi everyone
I am looking at getting a VT and transplanting the 5.0L and auto into my HT sedan.
Anyone that has done this transplant, what problems were encountered? Does the transmission tunnel need to be modified and if so is it possible to refit the bench seat>
I also want to try and make it a column auto. The HT was originally a 161 manual.
Any advice would be appreciated.
Thanks in advance
mh
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Engine will fit fine, the 5.0L is basically identical to the HT's 253/308. If you use a TH350 it will fit without tunnel mods, but you'll have to rig up a column shift crossover setup probably using factory HQ-HZ TH400 crossover styff. The 4L60E box if used will require some floor surgery |
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Thanks for the reply.
I was hoping to use the 4l60E but it sounds like it might be more effort than it is worth, do you need to have the BCU for this installation or just the ECU for the engine? Are there the same problems with the tunnel etc with the TH700?
Regards
MH
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The body computer (BCM) reads the key, then sends the "all OK" signal to the engine computer (PCM) to allow the engine to start & run. This is called "Vehicle Anti-Theft System" or VATS for short.
To get around the hassle of all the wiring & the BCM/key crap, you can have the memcal re-programmed (or "tuned" as they call it these days) to remove VATS, and it's not a very expensive thing to do.
The 4L60E is just the electronic version of the 4L60, which is the updated name for the TH700R4, so you're effectively talking the same box, but the 4L60E has a different valve body (uses electric shift solenoids), speed sensor system, and a multi-pin plug on the housing. |
Cheers,
Mick
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Have a look at a HK-HG. The integral body member that runs across behind the shifter hole/mount (on a floor shift) that also supports the front seat load fouls the rear of the box. Best bet is to find someone that has done it and see if you can get pictures to see if you are comfortable with it. To do it properly it will require Engineering on the floor mod. A better way to do this and avoid any issues is to buy yourself a whole VN-VS engine, and get a HT-HJ trimatic block, sump and HQ-WB engine mount adapters. Rebuild the red bottom end and put all the EFI top end onto it. Then you can run a column shift trimatic and there will be no Engineering involved for the engine (possibly for the size change in some States but not for ULP etc). Column shift trimatic will work with all factory bits, just use a HQ-WB RH shift box. |
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^^ You'll need one of the speedo adapters to give the ECU a speed signal, and if it's an auto memcal, the lockup convertor will need to be disabled in the memcal or it will throw up an error code. |
Cheers,
Mick
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Thanks for all of the useful inofrmation and advice? I will have to rethink a few aspects of this conversion.
Regards
mh
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All you need to do with the speed sensor is to get CRS or the like to make you up a short cable with trimatic end on it and the other end a threaded end like a TH400 etc has on it, then use an inline speed sensor. A shortened Saginaw/powerglide cable from there to the dash using the original 6cyl speedo cable hole in the firewall. Don't be too concerned with pulse per rev etc as you just get the ppk constant adjusted in the memcal to suit that and your diff ratio & tyre size.
If you wish to run the whole EFI engine, just use a TH350 and make up a column shift setup for it. You could also run a V8 3spd manual with a Dellow/CRS bellhousing, and this will fit exactly where the 6cyl 3spd fits, just use a HT-HG V8 3spd clutch mechanism. Or get a trimatic's bellhousing modded to suit the TH pattern EFI 5.0L engine. |
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