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Author Topic: my new 'girl' (a TJ200)  (Read 6056 times)

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Offline bushmechanic

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Re: my new 'girl' (a TJ200)
« Reply #40 on: July 17, 2017, 07:30:36 PM »
You seem to be on top of this! I always thought it was cut down to 6 volts while running. I know some systems use 12 volts for starting then through the resistor for running. Trouble is if you put it direct voltage then it will go to what the alternator puts out, say 14 volts.

Offline krusty

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Re: my new 'girl' (a TJ200)
« Reply #41 on: July 18, 2017, 12:05:47 AM »
Bushmechanic....

I thought I read somewhere else that the ideal voltage for a UC12 coil was around 8v. As for the 12v start, you will see starter solenoids with an in and out for high current and then 1 or 2 terminals in the 1/8" range. If it has one, it is to activate the solenoid. If it has 2, 1 is to activate the solenoid, the other is to connect to the + terminal on the ignition coil thus bypassing the resistor and is only activated when the starter is cranking.

There is an alternator on my old TJ but wiring that up is on my todo list :) Since it left my house back in the winter is has been in the woods with only fluid top ups and an ignition coil.  I will bring it back home in the fall for a once over before the cold comes.

Offline krusty

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Re: my new 'girl' (a TJ200)
« Reply #42 on: June 22, 2019, 06:56:01 PM »
@bushmechanic do you know what SAE bellhousing size is on the Ford 172 in these? Well I guess it would be on the tranny portion but I have a lead on a good 353 to swap in. Everything should fit fine but want to be sure it will make up to the existing tranny. The 353 is a good runner and cheaper than a 172 rebuild parts and minimal machining as required.

Offline bushmechanic

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Re: my new 'girl' (a TJ200)
« Reply #43 on: June 24, 2019, 04:57:04 AM »
The bell housing will have to change on the gearbox, you will also need an adaptor plate to get to the SAE # of the engine's rear housing. I'm not sure if a 353 will fit into that frame... a military aluminum one might because of the low basepan. A front sump oilpan will be on top of the front differential. I'll try and get some pic's so to help you understand.

Offline krusty

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Re: my new 'girl' (a TJ200)
« Reply #44 on: July 08, 2019, 05:01:43 PM »
Ya the sump looks like it will be a problem. When I take the 172 gasser out, once the front bolts to the frame mount are out can I tilt the engine up and forward or do I need to take the tranny out too? It is caked in oil at the back of the engine so am not sure if I can just disconnect from the bellhousing and remove engine or does the tranny need to come with it?


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