Will Someone Help Me

[Destefano027]

i have a 78 cj 7 that does not more forward just backward it feels like it want to move but it doest i no it is not the trany because i just had it rebuilt but all at the same time i put a dana 44 rear and a 30 front i also changed the transfer case could it be one of them what could be wrong why dosent my jeep move

[ehirner]

Does it roll forward if you put it in neutral and push it?
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04 Unlimited

[Destefano027]

yes

[ehirner]

I would think that rules out the axles, differentials, brakes frozen solid, and t-case. Perhaps something tranny or engine related.
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04 Unlimited

[Destefano027]

i realy dont think it is the motor or the trany they were just rebuilt. i was thinking it would be in something i changed because it worked before i changed it like the axles or transfer case because they were both used

[Code3TJ]

Have you (carefully) jacked it up to see which tires you can get to turn under power?
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Nothing to see here.

[Destefano027]

yes all the tires turn in the air but on the groung they dont turn but it does go in reverse

[Code3TJ]

[Destefano027]

everything works properly all like it should the tranny shifts like it should and the tires spin when you hit the gas i was thinking that maby it was in the rear end the pinon gear or ring gear something like that but im not sure what to check for

[Orangeamc13]

Are the differential gears the same size?
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[Destefano027]

yea they are 3 73

[Brad The Best]

[Destefano027]

it was the rear end the pinon was all tore up it only had a couple of teeth left on it . what could of caused this

[Brad The Best]

burn out's , improper backlash setting , backing into something really hard , pinion aligned wrong

basically misalignment and abuse or defective , glad to hear you found out what was wrong

[Destefano027]

thanks for all the help