HeyCharger Posted June 17, 2009 Share Posted June 17, 2009 Hi Guys, Would a bogey drive off a CH just slip into a B61's frame or are they different widths?Thanks. Rod.And where would I find the ratio's stamped? Quote Proud owner of;1961 Mack B61 prime mover.1981 International ACCO 1810C DualCab Fire Truck Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/ Share on other sites More sharing options...
Bollweevil Posted June 17, 2009 Share Posted June 17, 2009 You will find ratio and ID numbers stamped on a flat pad on the passenger side upper front of each differential. From year to year, with different configurations, overall frame inner and outer dimensions change. You will just have to measure and see. I would think that maybe a difference in the width, or height of the frame rail it's self might be a problem. Then again, measure it carefully. If you find that the CH cross member is narrower you can cut shims from flat stock. Wider might not be so easy. Quote Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-36854 Share on other sites More sharing options...
monty Posted June 18, 2009 Share Posted June 18, 2009 Want to go faster rod? u hoon !!!! Quote Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-36871 Share on other sites More sharing options...
HeyCharger Posted June 18, 2009 Author Share Posted June 18, 2009 Want to go faster rod? u hoon !!!! Yes please. Quote Proud owner of;1961 Mack B61 prime mover.1981 International ACCO 1810C DualCab Fire Truck Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-36872 Share on other sites More sharing options...
b61mack Posted June 18, 2009 Share Posted June 18, 2009 Hi Guys, Would a bogey drive off a CH just slip into a B61's frame or are they different widths?Thanks. Rod.And where would I find the ratio's stamped?Rod i have a frame from a 96 CH613 with airride the frame from the CH is straight from front to back, just find out how long you want it. i sliped the frame over the outside of B61 up to under the back of the cab. i used the two holes on each side on the cab mount crossmember and clamped on the top and side drilled the holes bolted it together, did not weld anything.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-36876 Share on other sites More sharing options...
monty Posted June 19, 2009 Share Posted June 19, 2009 Yes please. why not change the diff centers? it may just bolt in ? be cheeper ? but it could be different i your case? have u found one? Quote Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-36916 Share on other sites More sharing options...
HeyCharger Posted June 19, 2009 Author Share Posted June 19, 2009 why not change the diff centers? it may just bolt in ? be cheeper ? but it could be different i your case? have u found one?[/quotHi Monty. Just remember my rear end is from an "NR MACK", so I don't know if the centres are interchangeable.Yes, Tomorrow there is a CH chassis and bogie up for auction at Mittagong. Quote Proud owner of;1961 Mack B61 prime mover.1981 International ACCO 1810C DualCab Fire Truck Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-36917 Share on other sites More sharing options...
HeyCharger Posted June 18, 2011 Author Share Posted June 18, 2011 Hi guys. Sorry, been absent for awhile.Just to give you an update. I swapped my 9.02 axles for 4.64.Wow. talk about smokin'.My top speed has now gone from 65 kph (40mph) to a THEORETICAL top speed of 126kph (almost 80mph).Most of the local country driving, I don't even get into O/D now. Now I have to balance the wheels Quote Proud owner of;1961 Mack B61 prime mover.1981 International ACCO 1810C DualCab Fire Truck Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-79877 Share on other sites More sharing options...
Rob Posted June 18, 2011 Share Posted June 18, 2011 Hi guys. Sorry, been absent for awhile.Just to give you an update. I swapped my 9.02 axles for 4.64.Wow. talk about smokin'.My top speed has now gone from 65 kph (40mph) to a THEORETICAL top speed of 126kph (almost 80mph).Most of the local country driving, I don't even get into O/D now. Now I have to balance the wheels Hi Rod, great to see you post again. I'd wondered about the gearing thing as you mentioned it prior. Did you ever get a powe steering setup going for the truck?Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-79878 Share on other sites More sharing options...
HeyCharger Posted June 18, 2011 Author Share Posted June 18, 2011 Hey Rob. Great to hear from you. re the power steering...not yet. Still have your pictures.Found a very good local engineer who put the rear axles in for me and mentioned to him that my next project would be the power steering.This axle swap set me back a few dollars, but well worth it.I cruise now on about 1500-1600rpm, still a gear to go and NO earplugs.Didn't know a '61 could be so pleasant to drive.(Also been a bit pre-occupied buying some old farm tractors )Rod. Quote Proud owner of;1961 Mack B61 prime mover.1981 International ACCO 1810C DualCab Fire Truck Link to comment https://www.bigmacktrucks.com/topic/9769-ch-and-b61-rear-frame-question/#findComment-79880 Share on other sites More sharing options...
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