Popular Post Freightrain Posted Monday at 05:24 PM Popular Post Share Posted Monday at 05:24 PM Was surfing Marketplace Saturday and came across an ad that caught my eye. RTLO 18913a $3500 Out of power unit that only used one gear. Low hours. Was super clean inside, sliding clutches all looked untouched. He has three, I bought one for my truck for when the 300+ gets installed. Overkill?? Absolutely. But won't have to ever worry about hurting it. And I am good with that. Double OD so it gives me longer legs. 6 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/ Share on other sites More sharing options...
tjc transport Posted Monday at 05:49 PM Share Posted Monday at 05:49 PM why wait for the 300? i bet the 237 will be happy with that trans too. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580941 Share on other sites More sharing options...
Popular Post Freightrain Posted Monday at 07:18 PM Author Popular Post Share Posted Monday at 07:18 PM No doubt. It likes the Triplex splits but it is going to take some fab work to make it all fit and not sure I am ready for all that.....yet. I do have to finish my racing season. Have to work on mounting arrangements, may have to change clutch housing? Push clutch instead of pull. Now that I have something to touch and see I can start with working on a plan. Hard to do that with just pictures on a computer. I had him put a forward X cover on it instead of a rear. It will just be in front of my cross member on the floor that I put in when I rebuilt the floor. It gives me something to bolt seats into and stiffened everything. A rear cover put it just behind the cross member(pc of 1" sq tube). 3 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580946 Share on other sites More sharing options...
terry Posted Tuesday at 02:12 AM Share Posted Tuesday at 02:12 AM Are you sure it’s a double over or single overdrive? Terry Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580977 Share on other sites More sharing options...
Popular Post Freightrain Posted Tuesday at 08:18 AM Author Popular Post Share Posted Tuesday at 08:18 AM It's double. .86 and .73(something like that). Per Eaton website. 3 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580982 Share on other sites More sharing options...
Popular Post Geoff Weeks Posted Tuesday at 01:03 PM Popular Post Share Posted Tuesday at 01:03 PM The newer Eaton's are like that. direct is one gear down-high. A overdrive front box with an underdrive splitter all plumbed for seamless progression (unlike the older underdrives). Gives 2 OD ratios, but not big jumps. 4 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580988 Share on other sites More sharing options...
terry Posted Tuesday at 01:54 PM Share Posted Tuesday at 01:54 PM Sounds like a pretty good trans for what your doing, I like the gear steps in high range. Why not go with a pull clutch, or is there a linkage problem with that? Got to thinking B model clutch release set up probably won't work with a pull type clutch. terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580994 Share on other sites More sharing options...
Freightrain Posted Tuesday at 02:33 PM Author Share Posted Tuesday at 02:33 PM 1 hour ago, Geoff Weeks said: The newer Eaton's are like that. direct is one gear down-high. A overdrive front box with an underdrive splitter all plumbed for seamless progression (unlike the older underdrives). Gives 2 OD ratios, but not big jumps. I like the even splits all the way up. It seemed like a good choice. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580995 Share on other sites More sharing options...
Freightrain Posted Tuesday at 02:36 PM Author Share Posted Tuesday at 02:36 PM 45 minutes ago, terry said: Sounds like a pretty good trans for what your doing, I like the gear steps in high range. Why not go with a pull clutch, or is there a linkage problem with that? Got to thinking B model clutch release set up probably won't work with a pull type clutch. terry I will need to do some fancy footwork to convert to pull clutch. Either linkage or add a cable to the end of my existing pivot and loop around and attach to arm. Have arm hanging down and pull backwards. Either way is doable. Local friend has a B with an 8LL and said I can come up and see what he did. 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-580997 Share on other sites More sharing options...
terry Posted Tuesday at 04:37 PM Share Posted Tuesday at 04:37 PM The pull clutch would probably be easier to get parts for. terry 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581004 Share on other sites More sharing options...
Popular Post Geoff Weeks Posted Tuesday at 05:08 PM Popular Post Share Posted Tuesday at 05:08 PM 27 minutes ago, terry said: The pull clutch would probably be easier to get parts for. terry You're thinking commercial use, Larry the only driver and being used the way he is, any clutch should outlast 7 lifetimes. It depends on what can be found, and how much has to be bought, which way would be best. I wouldn't pay a premium for "common" in this case. As I have said before, I ran 14" organic clutches and they outlasted the engine builds. I was doing commercial and some heavy haul with mine. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581005 Share on other sites More sharing options...
terry Posted Tuesday at 07:05 PM Share Posted Tuesday at 07:05 PM (edited) Yeah geoff i ran a 16 inch single disc clutch and a quad behind a 237 and had no problems for many years, but i was the only driver, and yes there was a 16 inch clutch, came off early V8’s. terry Edited Tuesday at 08:09 PM by terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581015 Share on other sites More sharing options...
67RModel Posted Tuesday at 07:16 PM Share Posted Tuesday at 07:16 PM 10 hours ago, Freightrain said: It's double. .86 and .73(something like that). Per Eaton website. You may have said it in another post I am missing but what ratio is in your rear end? Are you planning on changing that too? Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581018 Share on other sites More sharing options...
Popular Post Geoff Weeks Posted Tuesday at 08:06 PM Popular Post Share Posted Tuesday at 08:06 PM 58 minutes ago, terry said: Yeah geoff i ran a 16 inch single disc clutch and a quad behind a 237 and had no problems for many years, but i was the only driver, and yes there was a 16 inch clutch, cane off early V8’s. terry I think there was even a 17" at one time. I know we were looking for something to replace the British bus 17" and saw Mack had one, but too much was different. Had to get our clutches air freighted in. Didn't have to do many but they were expensive when we did. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581020 Share on other sites More sharing options...
Freightrain Posted Tuesday at 10:07 PM Author Share Posted Tuesday at 10:07 PM 2 hours ago, 67RModel said: You may have said it in another post I am missing but what ratio is in your rear end? Are you planning on changing that too? Currently 4.10. If I hadn't found the double over I was on the hunt for a 3.50 rear. The old Rockwell is thin pickings these days. Found a few but too pricey plus shipping from far away. Rear had 3.70 when I bought it but the old 673 didn't have the power to pull it so I swapped up to 4.10. Wished I had kept the 3.70 or bought a 4.10 instead of trading it off. Oh well. 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581032 Share on other sites More sharing options...
terry Posted yesterday at 02:48 AM Share Posted yesterday at 02:48 AM 4:10 rear with that overdrive that B will really scoot, i’m gonna guess,1600 RPM should be around 65 MPH ? terry 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581048 Share on other sites More sharing options...
mrsmackpaul Posted 22 hours ago Share Posted 22 hours ago You blokes are pretty quick, mind you'll find it nice and quiet at 1600 rpm My bucket of bolts is pretty loud over 2000 rpm, 2100 is near 60 MPH and when I'm coasting along and the oils all hot it's ringing in my ears 1950 rpm is a lor quieter and at 55 MPH is much more relaxing Yeah very unfashionable and slow compared to blokes but we don't have traffic were I drive Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581051 Share on other sites More sharing options...
Freightrain Posted 18 hours ago Author Share Posted 18 hours ago Currently 1800 @ 65 mph. But would like it quieter. The truck had 4.62 with the 673 and 2100 was 65mph. Ya, flat on the floor all the time. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581053 Share on other sites More sharing options...
cruiseliner64 Posted 17 hours ago Share Posted 17 hours ago 4 hours ago, mrsmackpaul said: You blokes are pretty quick, mind you'll find it nice and quiet at 1600 rpm My bucket of bolts is pretty loud over 2000 rpm, 2100 is near 60 MPH and when I'm coasting along and the oils all hot it's ringing in my ears 1950 rpm is a lor quieter and at 55 MPH is much more relaxing Yeah very unfashionable and slow compared to blokes but we don't have traffic were I drive Paul That sounds just like our Cruiseliner.Its flat out 2100rpm at 62mph.50mph is around 1650rpm.Doesnt really matter because max speed for a truck in Ireland is 60mph on a motorway (freeway) and 52mph on all other roads subject to local limits.All trucks are required to have speed limiters fitted except vintage... Paul 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581054 Share on other sites More sharing options...
Geoff Weeks Posted 16 hours ago Share Posted 16 hours ago I would try that 4.10 before changing anything. 4.10 with .73 OD on 20" rubber is where I ended up, and liked it a whole lot better than the same with 3.90. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581056 Share on other sites More sharing options...
67RModel Posted 15 hours ago Share Posted 15 hours ago What is the gross weight of the truck and trailer. I cant imagine its more than 22,000 lbs. A 12 liter 300+ with a 13 speed should be able to comfortably maintain 65 mph on any US highway with 3.55s. Maybe even numerically lower. I don't know. You would think gear sets for an old Rockwell would be a dime a dozen but I guess they probably all got scrapped at this point. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581060 Share on other sites More sharing options...
Brocky Posted 13 hours ago Share Posted 13 hours ago 2 hours ago, 67RModel said: What is the gross weight of the truck and trailer. I cant imagine its more than 22,000 lbs. A 12 liter 300+ with a 13 speed should be able to comfortably maintain 65 mph on any US highway with 3.55s. Maybe even numerically lower. I don't know. You would think gear sets for an old Rockwell would be a dime a dozen but I guess they probably all got scrapped at this point. I would guess higher!!!! possibly 28k??? He has a 40 ft tri-axle trailer with more living quarters in it. What does his "battleship" weigh?? My quadcab Dodge Ram 3500 with a steel flatbed, 32 foot tandem axle gooseneck, and the 49 Diamond T 201 (5000 lb) goes on the high side of 23,000 full of fuel.. 1 Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581084 Share on other sites More sharing options...
Freightrain Posted 11 hours ago Author Share Posted 11 hours ago I'm just shy of 30k lbs. Not heavy but not light. I'd rather have more OD then I need then not enough. I can always run in 11th or 11th gear. Less heat and less power loss. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581091 Share on other sites More sharing options...
mowerman Posted 11 hours ago Share Posted 11 hours ago God love you for the thought Larry. I don’t even wanna make a comment on this except for many hours of searching for parts and as you mentioned shipping bills best of luck that’s a big big order you’ve got there. Quote Link to comment https://www.bigmacktrucks.com/topic/75868-new-acquisition/#findComment-581092 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.