Steve L

Hi Josh I just replied to you message. The 2v and 4v share the same bottom ends but there’s a huge advantage with the 4v heads, better economy, more grunt and smoother running over the 2v and I can’t recall seeing a cracked 4v head. Then came the E7. I think the heads remained the same but the stroke increased about 1/2 inch and the bottom end is visually heavier ( crank, rods ) the extra stroke Mack’s contained in the bottom end without increasing the block height, actually the E6 and E7 share the same dimensions. We have found the E7 bolts right in where the E6 was removed without any modifications. Your truck looks great and if it were me I would repower, we repowered our 2 Valueliners as didn’t want to be tied down to computers and the associated problems. Steve

Hi, I had one posted through UPS and was reasonably cheep. How much do you want for the unit. cheers Steve

I would be interested in one if you still have them Bud’s

Hi guys I’m looking for a E7 mechanical injection pump, or any info as to who might sell them new. thanks in advance Steve

I’m looking for one also Gravelguy, they like hens teef to find

Get a mate to sit on the mudguard pumping then go to work

I would go the Mack 44s any day, but that’s just me

I set all our manual E6 350 4V at 21 deg regardless or year, the auto advance/computer engines are much lower.

Hey 41 don’t make a rat rod outa it, restore it back to original. There’s plenty of inters etc to make rat rods, not a classic Mack. If you go ahead u gotta find a big Detroit, Or sell it to me.

Are they radial or nylon tyres. Nylon tyres always do that after standing just overnight let alone a few months or years. It should even out after the tyres warm up. If they are old tyres and standing quite awhile flat spots may become permanent.

Very true Mark, I see a lot of guys swapping out Mack boxes for Fuller due to ease of driving, which I’m sure they are. some love or hate Mack boxes and the haters are hard to convert. I purchased a new Mack E6 12 speed 350 in 87, done 2.4 million kilometres in it, had 2 camshafts failures in that time and absolutely no other trouble, never had the gearbox out. Sold it to a guy in Perth where I spent a couple hours showing him the gearbox ( wish I had my stick but it wasn’t my truck anymore) then flew back home. Just over a month later he called me and said the truck was in Mack’s getting a new clutch, he also mentioned fitting a RR which I talked him out of.

I would like to know the technique also Paul. My technique is after it’s in gear and moving forget the friggin the clutch. From B model quad box’s to 18 speed, single trailer to triples grossing 120+ tons . . . . forget the clutch. I have worn out engines before changing clutches. I used to sit alongside new drivers for an hour or two and take a 2 ft stick with me. They soon found out what the stick was for cos I used it on their knee if they attempted to lift their clutch leg. Oh they were the days, now I have to supply a cut lunch, a head banging stereo and ask them if they are comfortable. Times have changed.

The 9 speed is too far between gear changes especially the last 2 or 3 which you are experiencing now. The 12 speed is about 450 revs between gears. We run 12 speed ( our preference) 18 Mack and 13 road rangers, all trucks will be 12 speed Mack gearboxes as soon as I find another couple of rear mount PTOs to fit the 12s. I can tell you from experience as I do all the rebuilds myself the 18 speed is enormously expensive to repair and I don’t believe gear hardening is as good as it used to be back when Mack’s held the reins. The road rangers are every bit as good as a Mack gearbox just we prefer to keep our trucks all Mack and all compatible to drive. If you go RR make sure you find one with the engine mount ears on the housing, those housings are like hens teef to find here in OZ. I have never had problems with gearbox compatibility to the Mack engine, everything has always bolted up, one exception is there are 2 bell housing diameters no 1 and no 2. Be careful of the smaller ones, never seen one on a Mack though. I have a 6V53 and 610 RR which im fitting in a C60 Chev which have the smaller clutch housing.

I wouldn’t mind one of those ACs back here in Australia. It would be a/my restorers dream.