raybing

Hello All,

Im seeking info on this 2 speed aux transmission in a 1955 GMC 350 series. Looks to to be a factory install. It came with a Pontiac 287 V8 and Hydromatic Transmission. A crazy rare combo for a 16 gvw truck. It could be one of one. Ray

Hello, Not a Mack, its in a 1955 GMC 350 series that looks factory equipment. Im trying find more info on ratios, manufacturer, Torque rating, any other thoughts too. Ray

Hello, Do you still have this box? Ray

Hello, can you send me a picture Of unit? Price? Ray 612-709-1397

Guys, I was there yesterday. Crazy amount of trucks. Some great Macks too. So many old grain trucks of no interest to me. A lot of parts trucks. Im looking for a short box stepside pickup. If you see some thing online , I might remember more about it. Ray

https://www.farmauction.net/auction/nebraska-truck-hoard/

I had it all wrong. Rear driver all the time. Front engaged with air switch. Duh.

No broken pcs in front axle. 

Ok thanks

No issues under 4 bolt cover

Taking off  4 bolts cover now

I just removed short side axle drive cap. It moves gear set in side

I can hear the power divider lock

Rd 600 glider. 44000. I think

Mack axles. I always assumed front axle set always engaged. Rear set drives with air switch 

The rear set drives and both axles shafts are repaired. But only rear set moves truck

Besides a broken axle why would the front drive not pull. Thanks Ray

https://lewiston.craigslist.org/hvo/d/lewiston-mack-truck/7405473590.html

Not mine

In Washington state. Not mine

https://spokane.craigslist.org/hvo/d/spokane-1985-mack-mh613/7413119579.html

Hello,

My 92 E7 300 was upgraded about 10-15% by one size larger injector and a pump adjustment. Very easy. leave the turbo stock. Ray

As an owner of a 92 EM7 300 motor with a T2080 transmission and 5.05 rears. I have turned up the pump and upsized the injectors to increase power. The changes are very worthwhile. Articles on this site have stated to get to 350hp you need to change pistons and cam? So it would seem it more cost efficient to start with an E7 motor. I  have not put my truck on a dyno yet, so horsepower now Im not sure. My only complaint is the huge jump to the top overdrive gear. But it drive 65 to 70 fine.

https://omaha.craigslist.org/hvo/d/omaha-classic-fixer-upper/7075001781.html

Not mine. who is looking ? Mack or White?