Joey Mack

Have you un plugged the right side and checked for power on the harness to see if it is getting power correctly? Jojo

That's cool. I wonder when they started to put pups on the hood? Does the grill say Mack too ?

Good question..

Yeah, I couldn't remember for some reason.. glad you cleared it up..

For sure.. great point..

I don't see where you posted the model. I assume 'R' possibly DM.. whatcha got .. pics are always a joy 😊... What tranny?

yes.... yours is a 2 valve, and I think in '86 the 4 valve came out.. '90 was the first E-7...

does that mean you got the answer you are looking for?

Holy Moly!!!! Amazing........

no.. hook positive to ground, and neg to the line that goes to batt. neg. I have a positive ground truck, and it just seems to me that it is just simply reversed.. Have you searched some of these questions on the web? I did a little research, and that's how I came up with my simple thought's.. to me 'positive ground' is an oxymoron... Basically the chassis carries the voltage, and the ground is direct to the neg. on the battery... I hope others will add to this, and If I am wrong, please accept my apology... Maybe Glenn or Mechaholic, V, F,, heck too many to mention... jojo

I bet 30-40 Amps... I suggest a separate circuit, with a circuit breaker, or Maxi fuse.. Also, be sure the control switch can handle the amp's and make sure what is plugged in has a tight connection, so that heat is not generated by a loose connection on a high amp. circuit.. I'm sure you have replaced a melted heater fan switch or a Ford headlight switch in the past? Hope for more opinion's on this one... jojo

What Year Mack? I have a really good, affordable scan tool from O.T.C. It gives the basic info, then I go to my V-Mac books and read the flow chart's.. around $300.00 for the tool...

sad but.... it's almost complete....U.S.S. of A....

It's too bad Mr. Casey isn't close to me.. I have to pull a 454 and Turbo 400 tranny out of a C-10 Silverado.. I sure could use a good mechanic to help me pull it and re-build it.. Jojo

Heck, that 11 year old, did more work in those pic's than guys i tried to hire to help me fix trucks... You Go ! Kiddo... jojo

No biggie, just tossin some stuff out there... When I did the B-model, I removed the inner seal, and filled it with oil... 80W90... jojo

I'm no pro, but you reckon the hubs have a seal in the middle, and the wheel bearings are packed with grease, like a B-Model?

Hmmm? Don't see why 80W90 would be wrong.. you reckon, the climate you are in should dictate? As well as oil change intervals... Synthetic oil wasnt around when it was born.. jojo

yeah,,, UPS and USPS, had the pedestals on the hood's, but no Pup's.. That one looks like about a '96.. I worked on a lot of these many years ago... No 'Pup's' On the hood.. and the grill doesnt have MACK on it either... Those that were spring ride, were noisy to drive... Clackity Clack Clack... Now i'm thinkin 'bout the old USPS cab overs I used to drive to and from, to get them to the shop, then back to their yards.. Single 'x' tractor, real short wheelbase, Allison 5 or 6 spd. 55 mph tops. and I always thought If I had to slam on brakes, the damn thing would sit on its nose and I would be looking at the road... MR's?? not MH's . jojo

the 454 truck is factory.. and yes, it would be a hell of a street rod.. as far as the black one,,, I wont mess with it... it really is a pleasure to drive as it is... it would be cool if I had the '48 done with a good flat bed on it and put one of the C-10's on it and Terri drives the other C-10 to local shows...

Here's her '81... I put a new distributor in this one, tune up, valve cover gaskets,, It just sit's.. I drive it sometimes. 39,000 mile's.. factory 305 4bbl, turbo 350.. It rides like a new truck..

I thought about it Onyx... years ago I put a new distributor, mid rise, Edelbrock Performer intake, Edelbrock carb, water pump, thermostat, radiator,, and something else i'm sure, got it tuned and,,, My brother in-law enjoyed the power, a bit too much.. My plan is to put a decent cam, maybe smaller than a .49 thumper, like whats in my 400.. I also need to freshen up the Turbo 400, and a new torque converter... and pull the diff. cover off and see if it's ok... Of course I still need to get My '48 Int. KB-7 on the road.. I still have a bit more to do to her '81 C-10..

My beautiful wife pulled it 65 miles to the house, like a pro!!

Well, I got me another C-10 to fix.. 1976...The factory 454, is knocking.. I hope its just a bent pushrod or something top end.. My brother in-law just had to win the street race.... So we bought the truck for a few bucks...... When I'm better, I will start on it, (diag.) Jojo

You know it.... The 42 MT is heavy, but at least it has a nose cone that can hold it in place while you rest your arms.... Jojo