Howdy folks! Im getting geared up to do a Cummins conversion into my '91 OLD body GMC and im lookin for tips and parts sources. So I kind of want to turn this into a "Chevy Cummins conversion source's/tips/tricks thread"

I'll list the links I have when I get on my other puter later. Thanks guys!

 

I'm going to do the same thing in my Suburban. Engine mounts and accessories, Trans adaptors. I'm going to run the 4L80E and use a PCS controller, and have These guys help build me a trans. I'm going to run a spearco intercooler in it as well I hope.

 

You might want to think twice about using the 4L80E. It wont even remotely hold the power of a stock Cummins for very long.

 

They are stronger then people give them credit for. You just have to build them like anything else. Suncoast even told me they are just as stout as a 47re when they are both built.

 

When BUILT, not when run stock.

 

I've heard both sides of the 4L80 holding up or not...personally I'd rather use a Goerand 47re but be sure to keep track of everything you do with the 4L80, I'm interested to see how well it holds up.

does anyone make a low stall billet converter for the 4L80e's?

 

Yes, there are several companies that do.

 

I want to keep everthing inside the truck looking stock and not have to modify my driveline. I dont see why a 4l80e would not hold up to a stock cummins when they dont put that much down. My 24v only put 194hp to the ground and I know guys running 6.5s at 250 or so and they are holding. We will see, I like the way the 4l80e acts alot better then the 47re personally. They guarantee me it will hold 600hp and a 1000+ pounds of torque so we will see.

 

Get the guarntee in writing and don't lose it. Gone thru to many auto's behind my CTD that all had promises that fell thru

 

ditto. and make sure they know peak torque is gonna be real close to 1,000 rpm!!