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small block chevy swap

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Old 11-12-2009, 11:54 PM
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A clocking ring is used between the transmission tailcone and the transfer case. A paper gasket or RTV is all thats required. Seals are a non-issue.
Old 11-13-2009, 12:04 AM
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ok i guess, for some reason i forgot about RTV
Old 11-13-2009, 12:10 AM
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Originally Posted by FrankZ
Swap the front half of a 231C from an S10/s15 and the chevy input gear onto a 231J, then use a $60 clocking ring off of ebay and you're good to go.
so all you would need was the input gear for the T case that is compatable with the TH350 output shaft and the clocking ring
ok now i get it im an idiot for not seeing that
Old 11-13-2009, 12:24 AM
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Some really bad info being thrown out here.

Chevy 231's (NP231C) found in S10/S15's are driver side drop. Their bolt pattern is not the same as a Jeep 231 (NP231J). Chevy used a 5 bolt pattern, Jeep uses a 6.

The t-case input gear from a chevy 231 will fit into a jeep t-case and visa versa. This is important when you take into account the differences in tranny output shaft diameter and spline counts.

The low range gears are also interchangeable. Jeep 231s use a 3 planatary, chevy used 4 in there standard case and a the more desireable 6 planatary in the HD cases.

Chevy cases are equipped with a 1.25" wide chain vs the 1" wide jeep chain. The wide gear from the chevy mainshaft will fit the jeep mainshaft but you'll need the front output shaft from a Dodge 231 t-case to complete this homebrew chain swap.
Old 11-13-2009, 12:31 AM
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or you could replace the output shaft form the tranny so its spline and size match the input gear of the NP231J and get clocking ring or just get the kit from novak-adapt.com
Old 11-13-2009, 12:36 AM
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Cracking a transmission is far more involved than swapping a few parts in a t-case.....
Old 11-13-2009, 06:59 AM
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Originally Posted by FrankZ
Some really bad info being thrown out here.

Chevy 231's (NP231C) found in S10/S15's are driver side drop. Their bolt pattern is not the same as a Jeep 231 (NP231J). Chevy used a 5 bolt pattern, Jeep uses a 6.

The t-case input gear from a chevy 231 will fit into a jeep t-case and visa versa. This is important when you take into account the differences in tranny output shaft diameter and spline counts.

The low range gears are also interchangeable. Jeep 231s use a 3 planatary, chevy used 4 in there standard case and a the more desireable 6 planatary in the HD cases.

Chevy cases are equipped with a 1.25" wide chain vs the 1" wide jeep chain. The wide gear from the chevy mainshaft will fit the jeep mainshaft but you'll need the front output shaft from a Dodge 231 t-case to complete this homebrew chain swap.
i dunno alot of internal Tcase talk but so the final outcome he would get is a pass side drop bolt in tcase? well with a clocking ring... i dont ever plan on doing this but just learning... am interested in beefing up my Tcase one day and this may give me more of an idea... i guess the more planatarys the better? whatever they are... how do you know if its a HD? maybe in he ZR2?

Originally Posted by FrankZ
Cracking a transmission is far more involved than swapping a few parts in a t-case.....
agreed...

Last edited by huntingman2706217; 11-13-2009 at 07:03 AM.
Old 11-13-2009, 07:17 AM
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Originally Posted by huntingman2706217
i dunno alot of internal Tcase talk but so the final outcome he would get is a pass side drop bolt in tcase? well with a clocking ring... i dont ever plan on doing this but just learning... am interested in beefing up my Tcase one day and this may give me more of an idea... i guess the more planatarys the better? whatever they are... how do you know if its a HD? maybe in he ZR2?



agreed...
I'm not sure which GM vehicles have the HD t-cases, sorry.

This is these are the low range gears from my C and J cases. The planatary gears are the small gears around the outer edge. Make sense?

Old 11-13-2009, 07:25 AM
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what are you gonna do with that super reliable 4.0 you're pulling to put that v8 in there?
Old 11-13-2009, 07:32 AM
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Me or the OP?

Mine is a 4.6L stroker, freshly rebuilt with zero miles on it and its listed in the For Sale secton
Old 11-13-2009, 07:51 AM
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Originally Posted by FrankZ
I'm not sure which GM vehicles have the HD t-cases, sorry.

This is these are the low range gears from my C and J cases. The planatary gears are the small gears around the outer edge. Make sense?

got it... i see acouple of them anyways... and i take it the more the stronger...

and just did a quick search and found this... he used a 6 pinion planetary set from a Chevy NVG241 transfer case in his 231 he was building

Last edited by huntingman2706217; 11-13-2009 at 07:55 AM.
Old 11-13-2009, 10:52 AM
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You are supposed to use gaskets.
Old 11-14-2009, 07:30 AM
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Originally Posted by richxj89
all the ifs chevy t-cases are passenger side drop. that would be all 4x4 chevys from 92 and up. one of those would probably bolt right up
edit: i am a retard i meant to say they are driver side drop like the jeeps. i know when people sas them they have to use ford axles because the chevys drop on the wrong side
Old 11-14-2009, 11:40 AM
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could i put the 231-c behind the turbo 350 but instead of splitting and swaping parts in t-case. when i shorten or lengthen the drive shafts put the chevy yokes on the t-case ends of my drive shafts
Old 11-14-2009, 11:49 AM
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meh....just use these and throw a couple spares in your bug-out-bag.
http://eastcoastgearsupply.com/i-135...n-u-joint.html


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