roscoe69 Posted December 7, 2011 Share Posted December 7, 2011 Just curious if it would be a direct bolt in; B 421S w/ 2 stick 10 speed EN 402 gas.I know, why? !Thanks,Ross Quote Link to comment https://www.bigmacktrucks.com/topic/21997-18-sp-quadraplex-to-an-en-402/ Share on other sites More sharing options...
Maddog13407 Posted December 8, 2011 Share Posted December 8, 2011 as long as it is a TRQ77 series and not a TRQ72 series it will bolt right in. might even be the same shifting levers. cannot remember if the auxiliary is the same length under the bolt pod from duplex to quad. i know the smaller TRD77 9 speeds had a different auxiliary shifting lever. should be a direct bolt in, just have the shorten the driveshaft. also some 18 and 20 speed quadboxes in the b models had an extra support that bolted to the back gas tank bracket bolts and a cradle that went under and bolted the the flange between the auxiliary and main boxes. some also had a leaf spring that bolted to the center to support the back of the bigger transmission. all depends on the year. they did away with the leaf spring and used the cradle in the early 60's. , Matt Quote Link to comment https://www.bigmacktrucks.com/topic/21997-18-sp-quadraplex-to-an-en-402/#findComment-93250 Share on other sites More sharing options...
roscoe69 Posted December 9, 2011 Author Share Posted December 9, 2011 Awesome info! Thanks for the reply! Quote Link to comment https://www.bigmacktrucks.com/topic/21997-18-sp-quadraplex-to-an-en-402/#findComment-93352 Share on other sites More sharing options...
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