charlierebel1967 Posted April 22, 2018 Share Posted April 22, 2018 ok, so if I wanna put a straight 6 cyl in my 1986 Comanche, replacing my 2.5l, do I have to swap out different ttranny, rear end, etc??? Link to comment Share on other sites More sharing options...
Pete M Posted April 22, 2018 Share Posted April 22, 2018 what's the end goal for the truck? also, be sure to put the truck's specs into your signature. Link to comment Share on other sites More sharing options...
DirtyComanche Posted April 22, 2018 Share Posted April 22, 2018 It's a well covered topic if you search. But yes, the tranny needs to be changed. You may want a new rear axle since likely the one you have sucks, but it's not a requirement. Tcase may need a different input if you 4wd. You will need to do modifications to the firewall and radiator support, and probably many little things I am forgetting. Link to comment Share on other sites More sharing options...
carnuck Posted April 23, 2018 Share Posted April 23, 2018 What about the ‘86s low floor hump?Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Big Dan Posted April 25, 2018 Share Posted April 25, 2018 As others have echoed, theres a lot of information available by searching on the forum. With that said, its a BIG endeavor, especially with the 86. The 86 will require a lot of firewall beating/modification. Additionally, you will have to do a lot of cutting on the front of the engine bay to fit the 4.0 radiator/radiator support. Link to comment Share on other sites More sharing options...
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