My 1995 GMC 7.4L lost all of its power

[dirtyoldman]

Think I'd take it to a reputable trans shop and get their opinion.

 

[camarokid]

the only trans shop in town wants $1800 to rebuild it when I can get a mark IV and a th400 for a $1000.

 

[dirtyoldman]

Keep in mind the Gen V engine & 4L80E trans are computer controlled,putting the older engine & trans is going to be a lot of work,I'm sure it's been done but I wouldn't do it.I wouldn't think it's just an easy swap.

 

[camarokid]

The only thing I see a carburetored 454 is going to need to run is a switch for the fuel pump and a block off plate for where the mechanical fuel pump goes. I'll lose all my luxurys for a while but I hardly use them anyway.

 

[Kennyray]

You may be better off finding a used tranny.

 

[dirtyoldman]

Go here GMT400 - The Ultimate 88-98 GM Truck Forum and look around,they know way more than I do.

 

[camarokid]

You may be better off finding a used tranny.

I'd love too except no one has a used 4l80e

 

[Kennyray]

You may be better off finding a used tranny.

I'd love too except no one has a used 4l80e

I'm sure you could find one.

 

[OldCracker29]

As much as I miss the old carb's and TH400 tranny, there's no way I'd consider going back to them.

 

[camarokid]

I've searched all the areas on craigslist that I can drive to and couldn't find a 'good' used tranny.

The only reason I want the old 454 and th400 is because I know there is perf parts for it. I can't find any decent parts for the gen v. I don't have the coin to upgrade to the gen 6.