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j hancock

Mack Ultra-Liner Day Cab

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for the life of me, why would they have such a deep rear ratio?    terry:MackLogo:

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I am guessing by the pic. that would be some series of a 107 trans. still be a super slow truck.    terry:MackLogo:

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Most likely a T2050 5-speed with a 0.60 overdrive top gear.

As many times as I saw that truck in operation, it is painful to see it now in this state of disrepair.

That MH Ultra-Liner is as modern as any truck today.

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I think I'd seen that truck at Tidewater Mack back in 86, or 87 while I was in the Navy. Either that or a "spitting image" as the color layout was the same. Did not get close to it but I think it was in for service. What caught my eye was the Dayton wheels on the front as most were "Budd" at the time.

UPS was full of MH series at the time too.

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11 hours ago, kscarbel2 said:

Most likely a T2050 5-speed with a 0.60 overdrive top gear.

As many times as I saw that truck in operation, it is painful to see it now in this state of disrepair.

That MH Ultra-Liner is as modern as any truck today.

never even thought of that trans, got any idea what year the truck is?    terry:MackLogo:

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Should have looked at the transmission when I was standing right there!

The T2050 5 spd with .60 over would give an overall ratio of 3.192 in conjunction with the 5.32 rear gear.  That wouldn't be too user friendly.

The T2090 9 spd with .71 OD would be 3.77 overall and the T2100 10 spd with .77 OD would be 4.09 overall.  Either wouldn't be too bad doing interplant deliveries. 

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Isn't that unit on loan to Mack? I recall a threat on saving it here a few years ago.

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3 hours ago, j hancock said:

Should have looked at the transmission when I was standing right there!

The T2050 5 spd with .60 over would give an overall ratio of 3.192 in conjunction with the 5.32 rear gear.  That wouldn't be too user friendly.

The T2090 9 spd with .71 OD would be 3.77 overall and the T2100 10 spd with .77 OD would be 4.09 overall.  Either wouldn't be too bad doing interplant deliveries. 

You are right of course, the T2090 had a .71 overdrive........not .60

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My 83 Cruiseliner has 5.73 ratio with a .62 overdrive TR1070 in it on 22.5s. Does 72 mph at 2100 rpm.  I was running it to Pa every week couple of summers ago. Even with the E9 it still did 6.1 mpg

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Other than Ford and GM, back then Mack was the only big truck maker with a full scale wind tunnel. That's why Macks didn't have some of the weird buffeting other brands did and Macks got the best MPG.

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On 6/27/2019 at 3:38 PM, 41chevy said:

Isn't that unit on loan to Mack? I recall a threat on saving it here a few years ago.

Yes. That MH is owned by a couple of Big Mack collectors from Canada. 

They are on this forum. 

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Bigrig: Have you heard any updates about big bore for Mack in Canada?

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8 hours ago, bbigrig said:

Yes. That MH is owned by a couple of Big Mack collectors from Canada. 

They are on this forum. 

Can't find the thread on it but it was an interesting story how it was saved.     Paul

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