Re: LS swap for my 75
Bruiser- We had talks about an 8.1. Fact was the engine that is in the polar bear came from my garage. My budget really wasn't jiving with the expense, harness and controller, ect. So we horse traded and I got the MEFI4 controller and custom harness to run the 5.3 on, he got the engine. Hindsight being 20/20 knowing what I've spent so far on the 5.3 the 8.1 swap might be a wash. Then again my 5.3 was a take out of a customer's truck that had us install a 5.3ho GM performance crate. So no cost out as he didn't want it. Mine has room to grow with the 5.3 though as a 6.0 isn't hard to find either.
Getting back on track, if the OP is planning on using the PCM and wiring from the donor truck, using a 208 isn't going to get the vss signal needed. Go look for a pass side drop 241 from a 90-91 Blazer or Suburban. Specifically, a 27 spline input to match the 4L60e. That will have the correct VSS tone ring and sensor on the output of the t-case to provide the input needed to the PCM. The 241 will bolt right up to the 4L60e too. |
Re: LS swap for my 75
sweet thank you I'm going to start hunting tonight thanx again
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Re: LS swap for my 75
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Re: LS swap for my 75
So was pulling the harness from the motor and I'm having a hard time removing the plug that's were the shifter arm is. Theres 2 plugs neither one of them will budge. Any suggestions?
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Re: LS swap for my 75
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Re: LS swap for my 75
The connectors at the range switch are a little stubborn, but with a small pocket screwdriver or pick they should come free. The top connector, pull the blue clip out of the connector. Then lift up on the grey loop that is just to the left of where you pulled the blue clip from and it should release. Remember these are weatherpack connectors so the rubber gasket inside might not make the connector pop right out, you might have to work it side to side to get the gasket to release. The lower white connector just needs that bail end pulled up over the lock to release. Still, work the connector once it is loose from side to side to finally pull it out.
Heads look clean! Good Score! |
Re: LS swap for my 75
Man I'm full of questions and a really appreciate all your guys help. So if I switch to a 241 case will I have to modify my cross member? If so what transfer case would you recommend to use to avoid modifying the cross member thanx again
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Re: LS swap for my 75
how does $413 for a NP241 sound? or should I keep looking? not sure what they usually go for
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Look on car-part.com and search for the t-case with a 91 suburban v1500 in your area. I'm sure somebody will have one. That's how I located mine. |
Re: LS swap for my 75
Thanx I'll check them out in not having any luck around here
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Re: LS swap for my 75
So I found a transfer case hopefully the right one the numbers,are
241c 1561 4199 116 903 272 Sound about right? |
Re: LS swap for my 75
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Thanx Zoomad75 looked up that website found a np241 for $180. It 3 hours away but a buddy of mine is heading that way for vaca so he volunteered to.pic it up so now I need a shifter and crossmember
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Re: LS swap for my 75
Good Score. Not a bad price either.
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Got a shifter and cross member for $50 today
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Re: LS swap for my 75
on to my next question. slip eliminator. should I get one? ive read that a NP241 with 4 inch lift and 35's aren't the best together. to much stress on the back of the case and crack it. any suggestions, horror stories, or not that big of a deal?
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Keep this in mind, most SYE's are sold for Jeeps due to the extreme shortness of their rear driveshafts. A SYE allows one to add a little bit of length and a double cardan joint to correct for the crappy driveline angles on such a short wheelbase. K5's have twice the length or better in the driveshaft compared to the average TJ/YJ/CJ Jeep. This is the main reason to add a SYE on a Jeep or anything, not to stress on the output itself. Yes a SYE with a fixed yoke driveshaft will yield the most strength, but are you planning on extreme rock crawling? Or are you planning on trail riding with moderate obsticals? |
Re: LS swap for my 75
Defiantly no rock crawling, a trail here and there more speed bumps that tree stumps the crossmember i picked up has the skid plate so i should be ok thank you
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Another option is a slip yoke CV if your concerned about high angle / vibration / stress.
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found a local guy that will do my harness and PCM for $400. seem about right? he said he even has a motor on a stand for me to see it in action.
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So finally making progress on it. Need to figure out the fuel lines. My motor has the return lines. I'm new to AN lines learning as I go. I order dirty dingo mounts, ac delco pump, and 87 tank and sender
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Re: LS swap for my 75
That really looks sweet. I don't speak fuel line either, whether factory or AN. I see discussions on it here and read them to try to get up to speed on the basics but I think I need the Cliff Notes or something. Keep the updates coming.
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