Wobblin-Goblin Posted October 30, 2016 Share Posted October 30, 2016 Does it match up relatively easily, mechanics-wise? Any issues with replacing a 711 with a 237 I should know about? Thank you. Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/ Share on other sites More sharing options...
41chevy Posted October 30, 2016 Share Posted October 30, 2016 Larry (freightrain), has a thread on the swap into his B. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350427 Share on other sites More sharing options...
Maddog13407 Posted October 31, 2016 Share Posted October 31, 2016 should bolt right up, main issue might be bell housing bolts, the old 673's and 711's used 3/8s bolts in the bell housing, newer 673's, 711's and 237's used 7/16ths bolts in the bell housing. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350448 Share on other sites More sharing options...
Wobblin-Goblin Posted October 31, 2016 Author Share Posted October 31, 2016 My truck is a '64 B61SX with a 711 and a Quad. Would that count as a late model 711? Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350490 Share on other sites More sharing options...
terry Posted October 31, 2016 Share Posted October 31, 2016 5 hours ago, Wobblin-Goblin said: My truck is a '64 B61SX with a 711 and a Quad. Would that count as a late model 711? Put a wrench on bolt heads, I believe a 3/8 bolt will be a 9/16 wrench, and a 7\16 bolt will be a 5/8 wrench. terry Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350509 Share on other sites More sharing options...
Freightrain Posted October 31, 2016 Share Posted October 31, 2016 (edited) If you use your bellhousing then it will bolt right up. If you try to use the twin disc-like from a 5-6 speed(deep) bellhousing it might not. Be much easier to use your quad. All depends on what 237 you find. Mine was lucky and had single disc bellhousing. Most won't and you will have to indicate and redrill the dowel pins to fit your bellhousing. See the bellhousing? It has lower right starter and was for single clutch. It supposedly came from a firetruck, with how the oil dipstick was aimed I would guess it was a CF(cabover). It's for access from the rear, not the front like an R Model would be. Edited October 31, 2016 by Freightrain Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350511 Share on other sites More sharing options...
Maddog13407 Posted November 1, 2016 Share Posted November 1, 2016 at this point there is no tellin. after all these years ya never know. everything could be changed.best bet is to put a wrench on them. looks like larry's 237 has had an older bell added with the under mount starter and the two 5/8ths bolts in the top? Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350560 Share on other sites More sharing options...
Freightrain Posted November 1, 2016 Share Posted November 1, 2016 (edited) The bell looked pretty original to the motor, at least paint wise. I installed the flywheel and indicated it in and it was dead on so it was not just thrown on there. Being a Fire truck engine what would the typical transmission be? Still the same 5 spd as an R model with dual disc clutch? Though the flywheel bolts were oversized so it makes you wonder what the real back story is to this motor? Edited November 1, 2016 by Freightrain Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-350576 Share on other sites More sharing options...
joeyd Posted November 26, 2016 Share Posted November 26, 2016 use 1970's era quad bellhousing w/7-16 inch bolt holes in a b-81 dm800 exhaust fits have seen 237 engine in b-61 237 (ENDT675) EXCEEDS TORQUE RATING OF QUADRUPLEX TRANS. will work ok if driven easy do not put all the fuel to her suddenly 1 Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-353036 Share on other sites More sharing options...
jpavao1066 Posted December 14, 2016 Share Posted December 14, 2016 I was always told that you had to be careful putting a maxidyne in front of the older quad/tri/duplex transmissions because they were not designed to handle the torque like a maxitorque trans was. The maxitorque was a triple countershaft trans to handle the added torque load. That being said, in reality it all depends on how it is driven. Drive it like you would if it was a thermodyne and dont lug it way down and you would probably never have a problem. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/47497-does-a-237-bolt-right-up-to-a-quadbox-in-a-b-model/#findComment-355029 Share on other sites More sharing options...
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