Outbehindthebarn

Can anyone tell me where # 873AX33F   door glass seal goes?

1 hour ago, fjh said:

Possibly! Are the sticks located in the front or mid section?

Main is in the middle. But deep is up next to accelerator. 

I have a 12 speed with the second gear shift (not on air). It is gated so it can only be used in 1st gear as it should.... The question is, can this be worked around so that shifting through all five gears in the main transmission is possible? 

43 minutes ago, Joey Mack said:

Buy the 4:17's.   Gear sets are still available 

Because they're better, or just the availability ?

50 minutes ago, mrsmackpaul said:

I think the very first thing would be to determine were the metal came from in the oil and what causef it to fail

If the diffs have 3 million miles I wouldn't class them as weak

If they have only done heavy haulage with  half a million miles on them, then they probably aren't 

If they pulled truck loads of sail boat fuel and have 100,000 miles then maybe they are weak

If they were run low on oil or driven by a rough bastard they probably aren't weak

With out knowing the history it's pretty hard to make a call

Also if your rebuilding one center, I guess now is the ideal time to change the ratio to something to really suit what you want

3.87 would be no good for me, I wouldn't have the power to shift loads quick enough 

E9, even in it's smallest power size is still a lot more power than me 

 

Paul

The truck is new to me, I have no real first hand knowledge about how it was driven or what it hauled. But when I pulled drain plug found metal (fingernail size pieces). The gear set in it was pitting, flaking, chipping: it was a matter of time. I began to hunt around for a replacement 3.87 crdp92 and nobody had one within a 100 miles.... I actually had a guy tell me he had remanned 3.86 to sell, and that I could just use that... small difference he said. Another guy said he was crazy, totally different .. Which led me to wonder why Mack offered such similar ratios... 

Then a guy on facebook replied:   "I'm sure someone will correct me but from my understanding 3.87 was a weak gear set, most notably the spur gear. Subtle changes were made to make it stronger and the set wound up being 3.86. 4.17 and 3.86 use the same spur gear and 3.87 and 3.65 share the same spur gear, the last 2 being weaker."

My rebuilding shop agreed with the above statement at least as far as the "weak gear set" comment.

Any truth to this?? I haven't a clue.

He can order new parts to rebuild my crdp92 as a 3.87.. total cost around $2000.+

I found a set of carriers with 4.17's in them used for $500..

1 hour ago, kscarbel2 said:

The 4.17 harkens back to a tractor with a 237 and 5-speed. With a 300/5-speed, then a 3.87.

The 4.42 was my go-to for a 10-speed T2100, at the bottom of the fuel curve at speed.

What's your 'go-to' for an E9 12 speed OD with 11r24.5's in a road tractor? It currently has 3.87's, but I've never worked it... yet. Found metal on drain plug on the crdp92, so I pulled it... gear set is toast.

Rebuilder is shying away from replacing the 3.87 ratio. He called it a "weak gear set". I have zero experience with that sort of thing. He's steering me towards 4.42 or 4.17. 

That's the reason I asked about the closeness of the 3.86-3.87. .. and why he calls it a "weak gear set". 

On 6/4/2015 at 7:02 PM, kscarbel2 said:

I like a 4.42 ratio, but 4.17 will accomplish what your want.

3.87 (not 3.86) would be to high (low numerically).

Can you speak as to why two such similar ratios were offered?

On 3/14/2025 at 8:53 AM, Ty7 said:

I’m sure my chance is slim but I’m looking for parts for a similar truck wouldn’t happen to know if he has it and would part it?

He scrapped it.

I need to replace the boot on my 12 speed. It was and has been shot as long as I've owned it. Is there a slick way to fit all those air lines through a boot? I haven't had any success finding a boot through Mack that would fit my early Superliner with the 5"x7" opening. 

Love to see or hear what others do.

Thanks

Has anyone ever seen anything like this before? Is it a retrofit, or some option to get away from the axle mount steering gear? The frame on a Superliner 1 gets pretty narrow (weak?) where this box is mounted. Looks like the original Sheppard gear minus the sub-assembly... very interesting.

https://www.purplewave.com/auction/241121A/item/EH2873/1980-MACK-RWS766LST-Trucks-Truck_Tractor-Iowa

On 6/14/2013 at 10:11 PM, BAD DOG said:

Here' some pics. (519)-999-4706 thanks, Dan.

I like the stripes. Did the truck stay in Canada?

On 4/17/2013 at 6:53 PM, hillconst1 said:

Anybody else notice that the E9 predecessor was an option F735 ET1005? How did they get it in the frame? Never saw this listed as an option in any truck other than superliner or cruiseliner.

Yeah!? How about that? Very interesting.  I’ve never studied on a 865/6 V8 engine mounting to see how it compares to the E9, perhaps it would fit?

Does anyone know what the production numbers on the all aluminum F model cabs was?
 

Did a “FL700L” indicate aluminum cab as well as frame rails?

On 2/9/2022 at 11:51 PM, BOBWhite said:

My favorite part about the western models in the interior, specifically the bulldog with the cowboy hat might just be the coolest symbol on any truck!  Also after reading some of the literature on these I have to ask why the early E9 have twin turbos? A buddy north of me has a superliner with the E9 (which I envy) and it only has one turbo. When did they switch?  thanks

You may be thinking of the early V8, the 864(?). I believe it was available in twin turbo form. But I'm fairly certain the E9 was a single turbo only engine for Mack truck operation.

My Superliner 1 has heated mirrors, but they are pretty ugly, glass too, but the elements are still good and work

Is it possible to swap over the elements(etc) into non-heated mirrors? Found a beautiful set, but they aren't heated..

Don't have access to any to compare in my hands

(I'm talking about the bulldog mirrors)

Thanks

On 3/7/2014 at 8:28 PM, ClassicTVMan1981X said:

I am wondering if the F12 and F16 would've been likely competitors to the domestic class 8 COE segment that included the White Road Commander, the Freightliner COE, the Kenworth K100/Peterbilt 352/362, GMC Astro 9500 and the Ford Louisville CL(T)9000?

~Ben

F16's on American roads would have caused quite a stir. Joining in the fun of BIG power in the USA at that time.

On 11/28/2022 at 12:06 PM, brettj3876 said:

I run that turbo on a fully mechanical E7 with Rochester injectors and the rack opened all the way. I walk all over MP8s and isx's 

Driven responsibly, does that set-up return reasonable fuel mileage? 

On 11/8/2022 at 9:43 AM, Rusty Dog said:

Is this road boss still for sale?

No.. He scrapped it. I was just there last week.. It was pretty rough, would have taken quite a lot to get roadworthy... but the hood was good. No title and wanted $2500. 

Fuel tanks straps or steps?

I tried to buy that Road Boss at least ten years ago. Guy that owned it was a contractor for fedex. Had all kinds of old iron. Farm equipment etc. I don’t think he really wanted to sell it even though it was advertised .. more like someone was onhis neck to let stuff go. Something was the matter with the clutch, truck wouldn’t move 

On 6/18/2021 at 4:37 PM, Vladislav said:

Isn't this the case?

https://www.bigmacktrucks.com/topic/56715-1985-superliner/

Thanks Vlad.

I'd like to find a few of those original lug nut covers.. anybody have some?

Anybody know if this was an option on Superliners? Or was this a one-off? Anybody have any other images of this paint job?

Thanks

(Asking for friend in Holland, not my truck)

Looking for confirmation on the installation procedure for the thermostat install on E9. Bulletin shows installation tool, and has note on the bottom.. does the sleeve come out with the tool? Or Does it stay with teflon? 

 Friend says it's not closing after opening.

Hoping someone can provide a higher definition image of these SUuperliner designs... anyone? Anyone? Anyone??