OD Tranny in 79 W150

From : ygransom

Q: does anyone have experience in swapping a 518 od tranny for the stock 727 in a 79 w150 360 fulltime 4x4. at 214k time to do some motor work and looking to improve highway milage. .

Replies:

From : max dodge

there are several places on the net with good info. http//www.transmissioncenter.net/swapinformation.htm -- max join www.devilbrad.com and find out what free exchange of info is all about. there are four boxes to be used in defense of liberty soap ballot jury and ammo. please use in that order. -ed howdershelt author does anyone have experience in swapping a 518 od tranny for the stock 727 in a 79 w150 360 fulltime 4x4. at 214k time to do some motor work and looking to improve highway milage. .

From : snoman

on fri 16 mar 2007 032115 gmt max dodge max340@verizon.net wrote there are several places on the net with good info. http//www.transmissioncenter.net/swapinformation.htm you might check out link below to to see what they might offer. never seen this swap done but the biggest potentail problems with any of these swaps other than overall length changes and tcasee to tranny bolt patterns is the spline counts and lengths of tcase input and tranny output shafts. dodge ford and gm as used variuos combos within each brand over the years and even same tcase model/type can have different spline in different branded trucks. i would strongly suggest that is you want to seriously improve mpg that you do a tranny and tcase swap and loose the np203 and swap out the bastard hubless front axle dodge used then. the tranny/tcase swap might sound like a lot of work but it would be easer to replace that as a unit with a more modern tranny with od than to splice a different tranny in there because if tranny and adaptor is longer then you have to redo mounts and driveshaft lenghts as well as adapt it where with a complete swap you can basicaly use off the shelf parts amf at most modifed mount and driveshaft and linkage as needed. i would suggest using a np208 t case as it can be made to fit you truck and can supprt more modern trannies. you could use a np205 but it will require more adapting because it was never used with more modern trannies. being able to disengage front axle with free wheel hubs in 2wd can gain you a mpg or more on highway too the reason i said to loose the front axle earlier http//www.advanceadapters.com/ ----------------- thesnoman.com .

From : bigironram

you could use a np205 but it will require more adapting because it was never used with more modern trannies. http//www.advanceadapters.com/ ----------------- thesnoman.com np205 was used as late as early 1994 with a-518 and a-618 overdrive transmissions. from my perspective thats pretty modern. .

From : snoman

on fri 16 mar 2007 132433 gmt bigironram not@home.com wrote np205 was used as late as early 1994 with a-518 and a-618 overdrive transmissions. from my perspective thats pretty modern. only likley with athe ctd and such a tranny and its calibration would not work well for 360. i suggested the 208 because they are plentifull and will fit. begining around 95 when dodge went to new body stlye they had to change transfer cases because the moved the differentail pig to other side so those tcases will not work here. the axle used from 95 until aaorund 03 had a weaked front axle housing with a knotch cut in them for a axle shaft disconnector when dodge abandoned lock out hubs. i have seen many lifted late model dodge trucks with bent front axle housings because of this some may think i pick on dodge but it is not the brand but what they do with some things. i like the new aam front axle they started using in 2003 i think it is the strongest solid axle in use in a modern p/u but they had to go back to the 70s style bastard hub design that will not support lock out hubs so front axle is always turning and cause drag even is 2wd and it is not a negligible drag either. you can convert it to lockout yourself for about 2 grand when dodge could have done it for likely around 100 bucks or less in prodcution some may like that since there is no hub