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SPDRCR LS1 and 4l60e Build Thread

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Drilled some holes for the trans mount. Rivnuts are fun. 


mount in. It’s a tight fit. 



unfortunately I ran into into clearance issues. Not totally unexpected. The fittings for the trans cooler lines were squished on the tunnel wall. I tried to hammer it after dropping the trans down but couldn’t get the leverage. Then shenanigans ensued when I dropped the trans too much and the engine slid back so the intake was stuck in the firewall. Took me a minute to figure that mess out. Good times. 

Ended up having to pull everything most of the way out and mashed the passenger side tunnel right on the crease about 1” in. 

added some paint after all the banging. Then put it back in. 

Test fit the driveshaft and it was short. After conferring with you guys decided it was too much and contacted JCI. They are taking care of me. 


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Got the fuel line ran. I used nylon braided line. I used the old fuel p clips and cut half the rubber out of it. That made a good spot to run the fuel line. I left 2 holes in the mount and that holds the brake line and power line. I forgot to take a pic of that. I’m going to get a 90 fitting on the fuel rail to change the angle a bit cuz the line sits on the battery. 

I’m going to be an electrician soon if I mess with wires anymore. Here is the harness laid out. I’m really glad I didn’t wrap it on the bench. I had to cut the 02 sensors out to get the where they made sense. 



I created a new wire pulling tool. I can make extras if anyone wants in on a group buy or something. 


this is an absolute mess rights now but I really wanted the ecm in the car to keep the bay cleaner. I was able to pull the factory wiring through the firewall and strip all the old wires I don’t need anymore. The I slid the ecm connectors one at a time through the hole. 



here is my fusible link replacement. Just plain blade fuses that are powered directly from the starter line. I put on the 4 red and white wires that came from the links. 



then I made up a relay box. Using 5 relays and 6 fuses. 

fan relay and fuse 

fuel relay and fuse

starter relay and fuse 

ignition relay and 2 fuses split pass and driver side coils, inj, etc 

brake signal relay which will receive power from the brake light and ground the ecm tcc signal 




Edited by Spdrcr
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I love wire loom so much! I wish I could do it for a living... bleh!



plug wire is hitting the battery tray. I don’t know if I’m going to fix the plug or the tray. 



new driveshaft has arrived. still have to test it. 


picked up some plugs for all the extra ports



my pcv is going to be the factory line from the throttle body to the front passenger valve cover

rear passenger side plugged 

rear driver side has pcv valve in the cover itself 

pcv valve to old evap selonoid port  

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Need to get the cooling system hooked up so I can run it up to temp. 

upper hose

Lower hose


Steam port cut into the upper hose



needed to mount an overflow tank so I grabbed a universal job. 

gonna try and get it on the existing bracket




it came with a bracket that the holes lined up perfectly with the holes on the car 




gonna chop it 


warned you my fabrication is subpar 





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Driveshaft is in and fits perfect now. Just enough room to slip it in. 


the factory bolts were too small they did not go all the way through the nut. Grabbed some 5/16 x 1 1/2” bolts and washers that work great. 



here is spicy of the fuel line, power, and brake line. 


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  • 3 weeks later...

A few problems. 

first the new radiator is leaking when under pressure. eBay... 

then coolant was shooting out of the little air hole in the overflow tank. Like 3 feet up. That was fun. I believe it was just air since I’ve run it up and down in temp since then and it’s been OK. I may get a different style radiator with the in/out on the same side so the upper hose doesn’t have to cross over. 

second is transmission. 
level was fine when I put it in. Go to drive and nothing. No drivey drive. Check fluid and it was all gone. Figure it all ran into the converter and whatnot. I don’t know how long it’s been sitting. Ended up needing 6 quarts and is still a touch low. (I ran out)


after the first drive fluid poured out of the dipstick after I parked. Like a lot. Everywhere. Had to start the car to empty the tube. Fluid level was the same maybe a touch lower seeing as how much was now on the engine. I drove it again yesterday and after parking  I could hear air squeezing out of the dipstick. I pulled it and got a little puff of air. Lucky no fountain this time. I have to check the vent. Maybe I squished it during install. 

I just went around the block a couple of times but the transmission is slipping and mushy. Could be broke or could be the slightly low fluid. 

third is shifter is still not here.
Ordered one last month and about to cancel if it doesn’t ship soon. I have a rig set up to get me moving. 

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OHMYGHERD! tranny woes continue. Checked the level and it was low so I added some more. Still was getting some air out of the dipstick but I thought it might have been from being low on fluid. What do I know about auto tranny? Nada. 


anyway, took it out for another drive. Shifting much better.. and when I stopped at the end of the street...  poof! fluid goes everywhere. And I mean everywhere. All over the whole car, the paint all the way to the trunk, the window, the entire engine. The dipstick popped out from the pressure and  the fluid hit the rubber stopper and then bounced back. What a mess! 

get the car home and park and after I shut down I can hear the pressure coming out of the tube. I pulled the stick out a bit and a bunch of air came out. Spent about 2 hours wiping everything down. 

Figured it was one of these things
1. Overfilled - I am struggling with reading level but seems low still 
2. Vent clogged 
3. Filter loose in pan - car was crashed after all
4. Trans is just broke

Figured I’d start with vent. Had to drop the tranny down to get to it. Pulled the hose off and it seemed fine. Little tube seemed fine. I ran some wire through to make sure. Then rerouted the line. Put everything back. 

started it up and everything seems to work fine now. No more pressure out of the tube. So either the hose was kinked or the tube blocked. We have a bunch of snow here so no test drive till later. Please no more fluid everywhere!

Edited by Spdrcr
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Keep at it!  If it was easy everyone would do it.  Doing good so far, no body died, LOL.  It will get there, pink and all.  My bet is vent is messed up or cooling lines not right.  Something is building pressure, full or not.  PS  It is never an easy or fast process.  (I'm still chasing a rattle 4 years later, ugh).  R

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#$&@#$@#$! DASHCAP!! @#@*#$@##! GAUGES! 


You know what I’m saying?


Struggling to get the old gauges out.

Got that urge to just start pulling real hard. Figured I’d come look at pictures of finished cars or puppies or something and relax for a minute. 

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Good news is I went out for spin last night. Got some gas and did about 5 miles. No transmission issues! No more pressure building up. So either the line was kinked or the tube was clogged. I didn’t get on it at all cuz I have no exhaust yet. 

I did create a another tool if anyone want to buy one. It’s-a-don’t-spray-shift-juice-all-over-my-car tool. Luckily it wasn’t need. 


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Alright. Got the dash cap off.  Can’t get the gauges out with it on. 


yup I see why that’s on there



the problem I was having the odometer reset cable was wrapped around everything. After I got that loose just popped all the connectors off. 


A few screws and the old gauges come apart easily




I have new speedhut gauges to go in. they come with a ring that almost fits into the factory housing 282C0027-FFAF-4789-95D6-0012E3A41F74.jpeg.0c0930b5aea90fc6c7e9eb06dc8d8e1c.jpeg4A1A754F-8693-418E-AE06-4381A859E9F7.jpeg.a7196ffe54cb3dc9e92610b136d02c12.jpeg


i ground down the nubs a little bit and it fits right in for a tight friction fit! Perfect fit. So happy about that. Then I just drilled a little hole and used the old tiny screws to hold it in place. 




I have to figure out the wiring and get them in the car tomorrow. I also want to replace the cigarette lighter with something while the dash is apart.  Maybe a bass knob for my future stereo. 

Edited by Spdrcr
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Ok seriously. How do you get the clutch pedal out? I can see there is a bolt or something with my mirror. About to send the kid up there. 

also could not get the dimmer or odometer reset out. 

Did get the gauges wired up. Could not get the dimmer to work right. It was opposite of the factory lights. Also could not get the high beam indicator. Something with the ground vs 12v. Got tired of fiddling with it. 

I want change to all red lLEDs in the future anyway. 

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