small block chevy swap
Junior Member
Joined: Aug 2009
Posts: 71
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Year: 1989
Model: Cherokee
Engine: 4.0l I6
ok now i get it im an idiot for not seeing that
CF Veteran
Joined: Apr 2008
Posts: 13,952
Likes: 17
Model: Cherokee
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.
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.
Junior Member
Joined: Aug 2009
Posts: 71
Likes: 0
Year: 1989
Model: Cherokee
Engine: 4.0l I6
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
MJ>XJ
Joined: Mar 2009
Posts: 17,836
Likes: 7
From: Griffin, G.A.
Year: 1990
Model: Comanche
Engine: 4.0 I6
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.
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.
agreed...
Last edited by huntingman2706217; Nov 13, 2009 at 07:03 AM.
CF Veteran
Joined: Apr 2008
Posts: 13,952
Likes: 17
Model: Cherokee
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...
agreed...
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?
CF Veteran
Joined: Jun 2009
Posts: 2,173
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From: Columbus, Ohio
Year: 1997
Model: Cherokee
Engine: 4.0, comp cam, 99 intake, apn header, neon injectors, Thunderbolt 2.5" High Flow Cat
what are you gonna do with that super reliable 4.0 you're pulling to put that v8 in there?
MJ>XJ
Joined: Mar 2009
Posts: 17,836
Likes: 7
From: Griffin, G.A.
Year: 1990
Model: Comanche
Engine: 4.0 I6
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; Nov 13, 2009 at 07:55 AM.
Seasoned Member
Joined: Dec 2008
Posts: 434
Likes: 1
Year: 1989
Model: Cherokee
Engine: 4.0L renix
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
Thread Starter
Newbie
Joined: Nov 2009
Posts: 8
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Year: 1995
Model: Cherokee
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
CF Veteran
Joined: Apr 2008
Posts: 13,952
Likes: 17
Model: Cherokee
meh....just use these and throw a couple spares in your bug-out-bag.
http://eastcoastgearsupply.com/i-135...n-u-joint.html
http://eastcoastgearsupply.com/i-135...n-u-joint.html