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03' Big Red

Porch Pup
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Everything posted by 03' Big Red

  1. i have a question about the Mack air ride used in dump trucks, i saw a AL461 suspension rated at 46,000lbs, is this a true Mack suspension ? I have heard they are built by Hendrickson and it looks like the Primaxx does this suspension offer the stability and articulation like the Primaxx ?
  2. the big issue i find now is price, I have been told $25000-$30000 by two different shops, i don't understand how that could be possible, especially if i find a donor truck. i should be able to find a single axle RD with a E-Tech and Allison for a fair price.
  3. the 750 drd has a much lower 1st gear than the 4000 unless you jump up to the 4700, if i go with the 4000 series then i'll need a computer and harness and the cost is much more. i dont want to get into that, i want to keep it simple.
  4. thanks for the info, i run a 4:42 so my top speed will be about 55mph or so at 1900, not so bad since my work is mostly within 30 minutes and in a 55 MPH work zone. i have finally got a contact who did this swap a few times on a Mack and they are able to answer all my questions about flywheel housing,flexplates and tooth counts to keep the E tech happy.
  5. What axle ratio does your truck have ? Also does your trans have a rear support? I know the 4000 series requires one. i know that I need to pay close attention to tooth count on flex plate and tone ring/ speedometer gear to make things work.
  6. I have a few questions about parts interchangeably, will a Allison 700 series bolt up to a 4000 series flywheel housing and flex plate? is a spacer needed ? If so what p/n ? also what is the tooth count on the 700 series speedometer? My Final question, will the output shaft yoke from a 4000 series fit a 700 series this is for a conversion project in a 03 Mack RD688s that currently runs a Eaton 8LL
  7. Is that HT754CR going to hold up to a E9 ? I thought the torque rating was much lower than the 750DRD Am I correct the 1st gear ratio is 8.0 ? Or something like that on the 754 my truck has the AMI 370 and I would be pushing the torque limits. It’s around 1480 ftlb
  8. Ok folks i am still working on the details of this swap, I have a vin From a 2000 rd with a Allison, can anyone tell me which Allison this unit has and 1st gear ratio and also the axle ratio ? Vin 054124 also talked to another Mack tech and he says all that’s needed for the engine computer is to change the top gear ratio and change it to A designation for the automatic.. i would appreciate any other input in this swap, I plan to use to 750DRD for simplicity I also need to know what bell housing,flexplate and mounts to use.
  9. Did I say 1300 rpm ? My bad, it’s more like 1500 rpm, I am still considering the manifold and turbo ..
  10. I have not as of yet, just hit the 90,000 ish mark on a in frame, the engine really loosened up and runs excellent, I can shift at 1300 rpm now and it has the power to keep pulling, until recently I had to rev to 1800 or so. This is a tri axle, the gross weight here in PA is 73280 lbs
  11. The AMI has a much better rpm range 1200-2150 rpm and the torque rise is considerably more maybe 40-50% thats just a guess since I don’t recall exactly what it is... the AMI should out run the E7
  12. I would really like to keep this truck since I know what I have and to find a RD with a automatic set up like I need is fairly difficult. i did find a 2003 RD on the internet with a Allison VIN # 1M2P296C23M066900 this should help me create a parts list if I can’t find a suitable donor truck, my guess sticking with a RD would be my best bet for a donor truck.
  13. Thanks for the info, I did find a RD single axle that would work much better.
  14. I talked to my local Mack dealer, they contacted Mack engineering who wouldn’t release any info. i did find several 2001 LE donor chassis with the 4500 series trans, would the mounts and such from the LE work in my RD ? i would appreciate any information in regard to what I may have to change in my ECM, and if any changes are needed can a competent shop make those changes? Or would I have to find a dealership that would make things happen?
  15. I want to swap in a Allison 750DRD in my 2003 RD688S i run the Eaton 8LL now... no computer on trans my question is how will my ECM be effected ? amd what year donor chassis would work to get all the pieces needed? i am looking at a MR for the donor chassis
  16. So I am relatively new to this stuff, am I correct in saying that to go from a 370 to 460 its just a turbo and injector change and no ECM work ? Not that I want to change anything in my ECM, just curious. I’ve heard about a 460 XT that’s about 485 HP is that also injector and turbo or does it include ECM ? Sent from my iPhone using Tapatalk
  17. Any idea what kind of horsepower you have now ? Sent from my iPhone using Tapatalk
  18. That would be awesome! Sent from my iPhone using Tapatalk
  19. He did although I wasn’t sure if the turbo was for a earlier style no AI manifold Sent from my iPhone using Tapatalk
  20. Wow that’s a surprise, so if one is going for torque versus Horsepower then sticking with a AI 350 would give you more than the AI 460 Sent from my iPhone using Tapatalk
  21. I not concerned with cost since I plan to replace the trans and all my work is by the hour, it’s purely for driver enjoyment ! Sent from my iPhone using Tapatalk
  22. Would this be the Turbo needed for a E7 exhaust manifold? I want to go that route since the ports are much bigger and allowed better breathing. I think it’s a Q400 series versus the Q300 used on the AI,AMI Sent from my iPhone using Tapatalk
  23. The AMI 370 is rated at 1480 Ft lb tq at 1300 rpm but it will pull down to 1200 405 hp from 1700-1900 370 hp at 2150 Not at all like the AI series ! sadly I hear this file is no longer available from Mack Sent from my iPhone using Tapatalk
  24. I’ll be swapping out the trans as part of my maintenance program... fix it before it breaks... the 8 LL Has over 500,000 miles I’ll step up to a 9 LL with higher tq rating Sent from my iPhone using Tapatalk
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