Flexplate,Trans,Starter Questions - JeepForum.com

 
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post #1 of 4 Old 04-07-2010, 07:37 AM Thread Starter
SkullTripper
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1987 YJ Wrangler 
 
Join Date: Jan 2010
Location: Georgia
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Flexplate,Trans,Starter Questions

Ok I'll make a list...I explain a bit before I ask questions so you can see what I'm lookin for

I have a 4.0 swap and I think the stock transmission and the stock flexplate I've been lead to believe that... it is not possible to even crank my Jeep with this combo because of the CPS but my Jeep starts fine (kinda) it'll start but it has a good bit of chatter I just bought a new 4.2 starter still makes the noise I also bought a new flexplate( 4.2 ) because the old one has rust and cracks around the bolt holes (no missing teeth) SOOOO onto my questions

1.Should I install the new 4.2 Flexplate or do I need to buy a 4.0 flexplate?
2.How can I tell what transmission I have in my Jeep?
3.Does this mean I have a hesko (or other brand) CPS kit?

I'l leave it here for the time being


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My 1987 Jeep Wrangler Build..

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post #2 of 4 Old 04-07-2010, 12:57 PM Thread Starter
SkullTripper
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1987 YJ Wrangler 
 
Join Date: Jan 2010
Location: Georgia
Posts: 305
.......

Its a Jeep thing....

My 1987 Jeep Wrangler Build..

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post #3 of 4 Old 04-07-2010, 04:46 PM
BadAddetude
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1995 YJ Wrangler 
 
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I don't really follow your description of the setup you've got, but I know about the 4.0 auto situation.

The 4.0 needs the tone ring that is attached to the 4.0 flex plate, so the computer can figue the timing advance/retard via the CPS. You will also need an auto (TF999) that can accept a CPS, or I also hear that older 909/727's can be modified to accept one.

Determining if you have a HESCO relocated CPS: Look at your crank dampener pulley. If it has grooves/notches in it, and a little, round black thing mounted along the oil pan on the drivers side, then yes, you got lucky. It'll look like this:




An '87 YJ stock had, if I recall, a TF 727 trans with either a NP205/231 t-case. Im sure someone will correct me if I'm wrong.

1995 YJ: 4.0, 700R4, 231 C/J case, TeraFlex SS SYE/CV shaft, 8.8 with 3.73 gears, 136 Amp Alternator, Trans Cooler, Pavement Ends Flip-top/H-T, 2'' BDS Suspension Lift, MORE 5/8' Greasables, Sony GT-210 Xplode Head.

Under the Knife! See the build thread:
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post #4 of 4 Old 04-07-2010, 08:06 PM Thread Starter
SkullTripper
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Posts: 305
Well I'm pretty sure my flexplate is 4.2 the holes in the front look the same as the one I bought I'll check tmrw and see whats up

Its a Jeep thing....

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