Outbehindthebarn

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

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?

Because they're better, or just the availability ?

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..

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".

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

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

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

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?

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