700R4 to TH400 swap??? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-04-2002, 09:35 AM
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700R4 to TH400 swap???

Well, blew up the 700R4 again last Saturday. I still owe $300 on fixing it last time. Anyhow, the shop said I can get an exchange 700 for $680. Well, went to the salvage yard and for $700 I can get a TH400 with a NP 241 that are both newly rebuilt. The yard will give me $200 for my old tranny/ t-case but I think I can sell it for more since the t-case is rebuilt and the tranny has a new pump and converter and lockup silinoid. I think I will get the TH400/NP241 but jsut quirious if anyone knows what mods will be needed to do that swap. Any vacuum line difs to shift compared to the TV cable for the 700? Crossmember bolting up? driveline lengths? Cooler lines? Shift linkages? etc.... Thanks [img]images/icons/smile.gif[/img]
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post #2 of (permalink) Old 06-04-2002, 02:28 PM
 
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Re: 700R4 to TH400 swap???

i think the 350 trans has the same bolt pattern as the 700R4 but im not sure about the 400
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post #3 of (permalink) Old 06-04-2002, 05:01 PM
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Re: 700R4 to TH400 swap???

NP241- this is the newer IFS chevy t-case. The output would be on the wrong side for your straight axle.
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post #4 of (permalink) Old 06-04-2002, 10:46 PM
 
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Re: 700R4 to TH400 swap???

ok this has always been a big question of mine, could he jsut flip his axle over and have the pumpkin on the other side, just something i have wondered
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post #5 of (permalink) Old 06-05-2002, 02:13 AM
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Re: 700R4 to TH400 swap???

yes, if he wants to have a pull-off between his front and rear axles [img]images/icons/laugh.gif[/img][img]images/icons/shocked.gif[/img] plus the caster angles would be backwards
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post #6 of (permalink) Old 06-05-2002, 05:51 AM
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Re: 700R4 to TH400 swap???

If he did that in drive the front wheels would run backwards.
post #7 of (permalink) Old 06-05-2002, 08:29 AM
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Re: 700R4 to TH400 swap???

ya, I'll flip the front axles and do a spring under then maybe the torque of teh 400sbc will be strong enought to pull and make my truck a longbox.... [img]images/icons/wink.gif[/img]
Na, it's a NP241 from a 1990 Suburban, still with the pass side front output.
post #8 of (permalink) Old 06-05-2002, 11:53 AM
 
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Re: 700R4 to TH400 swap???

well dang if ya want a longbox that bad, ill trade ya [img]images/icons/wink.gif[/img]
Straight Up even [img]images/icons/wink.gif[/img]
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post #9 of (permalink) Old 06-05-2002, 02:57 PM
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Re: 700R4 to TH400 swap???

hmm.... well, see....... errr...... I don't think so, Tim [img]images/icons/smile.gif[/img]

But Nice try.
post #10 of (permalink) Old 06-05-2002, 04:10 PM
 
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Re: 700R4 to TH400 swap???

hmmm i didnt know my name was tim
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