glenbjackson Posted March 3, 2022 Share Posted March 3, 2022 i plan on making a convoy tribute truck, Ugly Duck(crooked DM). Plan on a repower from e6 to as close as i can. the Detroit i found is a 6v71 . i am wondering does anybody know for sure if the crankshaft (flywheel)flange bolt patterns, amongst 71, v71, 92 and v92 series, are the same???? not concerned about the pilot nor OD nor ring gear tooth count just the bolt hole circle Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/ Share on other sites More sharing options...
Hayseed Posted March 3, 2022 Share Posted March 3, 2022 Fairly sure the Flywheel housing will be a SAE#2... But happy to be corrected.. Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-490776 Share on other sites More sharing options...
glenbjackson Posted March 3, 2022 Author Share Posted March 3, 2022 (edited) i have read there are different size flywheel housings but at the moment not worried about this aspect. so not the flywheel housing bolt up but the crankshaft bolt pattern. Edited March 3, 2022 by glenbjackson Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-490778 Share on other sites More sharing options...
glenbjackson Posted April 22, 2022 Author Share Posted April 22, 2022 I'll answer part of this once I get this apart🤩 Got it started today! I'll post 6v71 and 6v92 cranks soon. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-495822 Share on other sites More sharing options...
1965 Posted April 22, 2022 Share Posted April 22, 2022 Flywheel housing bolts are different. 92’s got 2 extra 5/8 bolts on the sides. Flywheels will bolt up on both, I believe, been long time. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-495826 Share on other sites More sharing options...
glenbjackson Posted July 29, 2022 Author Share Posted July 29, 2022 well 71, v71 and v92 are all different as far as the motors i have. inline 71's manual mentions different size "flywheel housings"(SAE 1 and SAE 2) but i didnt see any mention of different crank flang sizes or cuts. also states the inline 71's crank has one hole offset 😠 Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-504681 Share on other sites More sharing options...
BOBWhite Posted July 29, 2022 Share Posted July 29, 2022 Is that an auto tranny that's on it now? What did this thing come out of? Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-504689 Share on other sites More sharing options...
glenbjackson Posted July 29, 2022 Author Share Posted July 29, 2022 6v92 MCI bus, allison auto 671 out of dump truck, pot flywheel & clutch, unknown trans. 6v71 genset Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-504692 Share on other sites More sharing options...
glenbjackson Posted September 29, 2022 Author Share Posted September 29, 2022 ok i was incorrect on 671 and 6v71 cranks not matching. They do match!!! On 4/22/2022 at 6:44 AM, 1965 said: Flywheel housing bolts are different. 92’s got 2 extra 5/8 bolts on the sides. Flywheels will bolt up on both, I believe, been long time. i was thinking samething so i checked again and it did fit but too small of ring. its from a 671 with SAE2 flywheel housing and my 6v71 is SAE 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69315-detroit-71-v71-92-and-v92-series-crankshaft-flange-bolt-pattern/#findComment-510555 Share on other sites More sharing options...
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