macks and brockways

Still need to know how to identify the difference between 55/58/65 ...... I didn’t know the ears that the frame sat in vary. Im trying to put 55/58/65 under a Non Mack truck.

I like to know the width between the outside frame perches on 55 and up rears - 34” possibly... asking from left side to rt side not front to rear Also I think 55/58/65 all have the rounded cone and 5” wide springs .... how do you discern between the 3 also is there any non cone axles that use 5” springs ? Thanks Rob 7045072453

I am looking for a floor mat to fit a "r"model style cab on my 77 Brockway, most of the ones from the Mack dealer have the Bulldog/mack emblem, I need one that is blank. I have seen one or two...called the local mack dealer and watts and they said never heard of one....if you know of one or and aftermarket co that makes them I'd appreciate the info. Thanks Rob 704-507-2453

I think it would be easier to load the front axle on a DM due to the 65" axle to back of cab, and possibly would have a tighter turn radius. As for production stopping in 88, somewhere I have seen a picture of a lot full of DM800's most with single square headlights not the double square RD lights or the traditional state side round DM lights. The caption said something about still in production in or for the Mexican/ south america markets this photo was around 92/94......

Rob, did you happen to see what series transmission they were using on the setup you are speaking about ^ ? thanks

I have wanted to add a auxiliary transmission to a couple of trucks in the past, but have refrained from doing so due to the high cost of the spicer 1241 and its replacement the TTC1750. The reason I want to do this is gain more on road speed/lower cruise rpms. These trucks are geared perfect for the off highway work as they sit so I am not re gearing the differentials, nor am I changing the front transmissions: so he goes my questions. I have considered trying to use a T20xx as an auxilary transmission..they are cheap, tough and have .60 overdrive. I spoke with a friend who is an engineer at Eaton and he said it would not work due to the input shaft not being designed to take the weight of a driveshaft and something else about the front bearing design. Well I spoke with another member of this board and he said he had seen it done...and spoke of using a carrier bearing right at the yoke of the front shaft to alleviate some of those concerns. Have any of you ever seen this done before? Success stories or horror stories? Think the 2050/2060 or 2070 is strong enough? What would you use for the front yoke? Think the carrier bearings rubber mount would move to much? Trans would be mounted to frame and front shaft supported at input to auxiliary by a carrier bearing? I realize the TTC 1750 is rated at 17500FT lbs of input torque to account for the torque multiplication in the front transmissions lower gears....however if you look into one of these they don't appear to be built any "heavier" than the Mack transmission. I will also mention trucks are already 24.5 tall rubber, and as I said before not changing rear ratios or differential ratios. Thanks in advance Got any cheap Tremec 1750's or Good Spicer 1241's laying around?

thanks, I figured it was probably for an air to air. I have found several DM800's for sale, but most are to short for a third axle. I'd love to find a E9 1 for sale, but seems most want a chunk for a E9. I'd just like to find one with 55, 58 or 65 axles and enough factory rail for lift axle and I'll slip my 863rwhp C-15 in it. If any body knows of a affordable DM800 for sale call me at 704-507-2453 or gradingman@aol.com...did not mean to hijack thread...RW

The truck is very nice for sure , I love to see them on 14.00x 24's...but got to say the red 1985 is more my speed....more road friendly and right wheelbase etc..Is it for sale? On another note, don't know why it has taken me 29 of my 39 years to notice this...but the radiator area on the e9 trucks looks a little different...I'm gonna guess the sheetmetal sides and bars being out further is due to an air to air? is that correct? Any body got it closer side by side views? thanks Rob

Looking at the original picture before the redo....it looks like it had the lighter weight front axle (1 Lug) ...in the later pics it appears to have the heavier (2 lug) axle...is that correct...what else did you change? An e9 dm800 is by far my favorite truck of all.....I just like the dm better than the RD...but they are rare as hen teeth down here.thanks is advance

not to add to the confusion, we have two dm 600's 79 models, allison 750's with 4.64 ratio..nothing, be it my V8 Superliner or my 550 cat powered KW will beat this trucks off the line...it amazing to me ..I guess the folks that shoot them down generally have never had one..Next time you and your high powered truck are at a stoplight besides a underpowered school bus..try and keep up..you will be suprised..the automatics are neat.

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...E:IT&ih=001 I believe this should

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...C:IT&ih=001 try this..divorce time

sorry for the double prints

I have a guy wanting to buy my Super Dawg, I know some body will say...as much as you can get, but wondering what it is worth. 1989 RW713 E9-450 V8, 8ll, 5.02 ratios Crd 112 & 113 rears, 24.5 rubber, 98k ORIGINAL MILES! Always been a lowboy tractor, has two line high and low pressure wetline, Dual breathers, spotlights etc from the factory, 50k rear on daytons color keyed with chrome lug and brake drum nut covers, 36"toolbox on pass side , polished wetline tank on drivers side, Factory AC converted to 134a, The original mufflers got a few holes in the bottom and I just put the tops on the elbows temporarily and its been that way for a year and a half, Needs stacks and better fenders, not a show truck, not a single rip or tear in the original seats, plastic around radio overhead is cracked and door panel armrest on drivers side has a tear from my dog, I run it daily now have accumalted about 10k miles on it in the past 2 months, whats it worth heavy built high horsepower tracor lowmileage, but 18 year old. Thanks Rob

Thanks for the help, I have Two friends with v8's 1 is 3.65 or 3.56 and has 1.6 million, the other has 3.87's So I know they can live if driven correctly, and yes a chrome cap will fit over my 8 bolt axle. My transmission is not a .60 "fast" mack trans it is a slow .74 Eaton 8ll, I think I might just Buy another truck and leave my 90k mile Superdawg alone for heavy hauls or sell it.

BTW if any Mack parts guys have time to help me research this by going on bearing size my vin is 004515, its an RW713, want unimount hub Part #s and brake drum parts #'s etc.

I have an 89 superliner that I need some help on please read all the way through ..please feel free to call 704-507-2453 if you can help. My axles are CRDPC112 front and CRD113 geared 5.02, I need to gear them somewhere in the 3.87 to 4.17 range..and was hoping to find something out there used that would work and be cheaper than MACK dealer quote..here is the next probelm I also want unimount hubs and drums to fit these axles..the daytons I don't like and it is hard to find the dayton drums for these axle and even if I had a pile of dayton drums for these I would still want the unimounts. I have no VIn # for a truck with these heavy axles and unimount wheels and i am having trouble getting a mack dealer to help me research it. Thanks in advance Rob

Our 1973 R700 is in very good shape mechanically, however, the electrical side needs a lil work. It has 4 6 volt batteries and what I think is called a series parallel switch. What is involved in converting it to 4 12v batteries like my Superliner. The truck is super dependable mechanically but not electrically. I am going to redo the truck, repaint it and repair the rust on the drip rail and want to get the wiring straightened out once and for all. thanks rob 704-507-2453 I might add that it is positive ground ..would there be benefit to switching to neg ground like the later trucks?

I am trying to post a pic dunno if it will work , 1 is The 89 E9, 1 is the 73 865, the other is the 77 Brockway.. If they don't show up. Somebody tell me how to post pics, Thanks Rob..BTW the New stacks are on order and I gotta get rid of those fenders and get somethin better.

We have a 79 mack with a 237 6 speed that is a tandem dump..it always gets at least 7mpg(generally hovers around 8 though) and still runs daily..however our other two DM's.. the cabs are shot..and I cant seem to find affordable replacement cabs..so that brings me to my questions..when did they switch to 4 valve? When did they go to electronic controls? I hate to admit it but our newest truck is an 89 superliner..so I'm not "afraid" of old stuff..but I need to find some better chassis to put these bodies on. I am shocked when some of these folks show up on the jobsite with the new Granites and tell me they are getting 4 to 5 mpg. I would like to know what yall think is the most Fuel efficent set up out there for on/off highway dump truck use..you will probably say 237 6 speed ..but its getting hard to find nice 79 DM's..lol. I have been thinking about buying some of the CH or MR postal trucks they are 300's and 740 allisons and are generally 6 to 12k for running driving 1997 models which would be unbelievably NEW for us. What is holding me back is the 740's lack of a deep reduction. Would these 97 models be electronic? I would figure I could just wackem in to behind the cab and put the back side of my DM's on the later cab and running gear. But I don't know much about the 97 era 300 mack engine. Any issues ? or are they as reliable as the 237? Any Ideas on and affordable way to get a deep reduction on the 740..or anybody have some cheap 750's?