How much you guys think a 89 Peterbilt 379 is worth?

Between $5k-$30k. Some guys would pay up to $30k for a pre-emission truck in good shape. $12k sounds ok if the miles are right. That should have way more miles though. Is 700k on a rebuild?

 

Read the post guy said it had a cat and swapped out with a detriot.

 

Hi Bfr, doesn't sound like a lot of money for one of the coolest trucks ever made. ( sorry, 359's are THE coolest) I don't have a lot of experience with the 11.1, I thought the 12.7 was a heck of a motor. Clearly worth it. If you can run it for a while, and try and bank some money, you'll be way ahead of the game( and drive a cool truck, to boot) I guess the biggest problems on an older truck, ( and that's not a heck of a lot of miles for an '89) is the electrical system. The fusebox on those, I think, is behind the clutch pedal, at least it was on my 359, and that was a source of trouble, hood wiring takes a beating, opening and closing the hood, so that might need work. Otherwise, think of it this way, someone probably spent 100 grand on that truck, and you are driving it for a fraction of that. I'd go for it. Good luck. Oh, one more thing, be wary of "alternator eaters". More than likely, a bad ground causes alternators to overheat. Make sure the cab has a good ground too.

 

When was the last year that Detriot was made? 700k seems low. We don't know if it was rebuilt or just pulled out of one truck and into this one.

 

12,000 isnt to much for the best truck ever build although cant understand why it was swapped out with a little 11.1 and not a 12.7 or kept the 3406b.

 

The 11.1 should've been made up until they had to start the egr crap. The 12.7 in my '03 has 792385 on it right now. Not everyone pounds the pavement 150k a year.

 

For the sake of comparison, I paid $35K CDN for the '86 359 in the sig pic. I thought that was a little too much but WTF I wanted it. The seller said he inframed it, replaced nozzles, cylinder head and turbo. SInce I bought it a year ago I've done rad, CAC, all the rubber, A/C compressor, wiper motor and bunch for electrical work. I've probably got an additonal $10,000 into it for $45K total. It has a 3406B/15OD/3.90

Sounds like you would have to put a bunk on that truck....is there room? The worst thing for me might be the 11.1 L engine. I have another truck with 10.9 L M11 Cummins with a 13 double over and a 4.33 rear gear. That little motor needs every bit of that 4.33 and those close ratios in the 13. I would be leery of a 3.xx rear gear behind an 11 L engine. If that truck had a B model cat It's probably 3.70.

 

.....also 460 hp seems like alot of power for a little motor.

 

Sounds like a lot of work still needs to be done to it. $5K sounds about right. I honestly wouldn't. Be willing to pay any more then that for a parts truck from the way it sounds. 700K on a Detroit is a lot. So it is pretty close to needing rebuilt again.