CK5
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1990 5.3 Jimmy
- Thread starter rderosier
- Start date
Some engine swap pics
As mentioned in the front post, I picked up a donor 1990 suburban that has a Dana 60 w/ yukon 35 spline inners and outers and a lock rite as well as a 14 bolt FF with a detroit, both 4:56.
It's got a fairly recently rebuilt 350 which is cammed and bored .30 over (which i obviously don't need) as well as a TH350 with manual valve body and reverse shift pattern, again, I don't need or want.
Came with brand new 52" 2.5 lift springs which I think I'll run in the front, rear has 2.5 lift springs with 4" ORD shackle flip which I'll probably also switch over.
Setup for full hydro but I prefer to drive it on the street sometimes so I'm going to switch to crossover with hydro assist.
Gets a little tricky from here, it has a first gen 203/205 doubler which I had planned on just selling but i'm flip-flopping on running it behind the 4l60e, opinions?
It's got a fairly recently rebuilt 350 which is cammed and bored .30 over (which i obviously don't need) as well as a TH350 with manual valve body and reverse shift pattern, again, I don't need or want.
Came with brand new 52" 2.5 lift springs which I think I'll run in the front, rear has 2.5 lift springs with 4" ORD shackle flip which I'll probably also switch over.
Setup for full hydro but I prefer to drive it on the street sometimes so I'm going to switch to crossover with hydro assist.
Gets a little tricky from here, it has a first gen 203/205 doubler which I had planned on just selling but i'm flip-flopping on running it behind the 4l60e, opinions?
Decided to put the face back on it after a little painting. The damn M fell off awhile ago and I couldn't find a repladment anywhere so I did away with the red letters completely. 
Hey fellow Colorado.
I'd love to hear opinions...Triple stick doubler too.
Also got a really great deal on this today
I'd love to hear opinions...Triple stick doubler too.
Also got a really great deal on this today
150
Rag joint doesn't really matter, I have an xj shaft all ready to go in. I appreciate the input though.
Rag joint doesn't really matter, I have an xj shaft all ready to go in. I appreciate the input though.
Were you having second thoughts on the Doubler, or?
My concern would be, doesn’t the ECM need the output for the VSS?
It does, but looks like this adapter that takes the 4l60e down to 4 bolts here:
https://www.advanceadapters.com/pro...5e-4-speed-automatic-transmissionadapter-kit/
Seems to take care of the VSS as well, though on my current setup the VSS is on the transfer case tailshaft, not sure it makes a difference. Looks like ORD will machine the tail housing on the Np205 to accept VSS as well.
Also I can't find many resources on running a doubler behind a 4l60e which made me wonder if it's a bad idea for some reason. I guess the lack of information makes me hesitate.
https://www.advanceadapters.com/pro...5e-4-speed-automatic-transmissionadapter-kit/
Seems to take care of the VSS as well, though on my current setup the VSS is on the transfer case tailshaft, not sure it makes a difference. Looks like ORD will machine the tail housing on the Np205 to accept VSS as well.
Also I can't find many resources on running a doubler behind a 4l60e which made me wonder if it's a bad idea for some reason. I guess the lack of information makes me hesitate.
I know a lot of it is that most guys are running 32 spline input, so 465/th400/NV4500/4L80e
There are concerns over the durability of a 4L60 in heavy trucks. Seems a correctly built one may hold up fine. Our resident 4L60 abuser @Babaganoosh will be along shortly
There are concerns over the durability of a 4L60 in heavy trucks. Seems a correctly built one may hold up fine. Our resident 4L60 abuser @Babaganoosh will be along shortly
Hmm. The doubler is behind a th350 currently so I just assumed it's a 27 spline. I guess I should pull it and check before I get all deep in thought about running it.
Guess that's a secondary concern, do I invest money adapting it to a transmission that might just blow up in front of it?
That's true with any trans.
I'm a fan of the 4l60e, it works and the first gear is awesome. Yes it isn't as strong as a 4l80e, if it wouldn't cost so much I would have one in my truck. I currently have a heavily modified built 4l60e in my truck and I'm not afraid to beat on it.
I've also got this roll cage I gotta figure out if I can fit thats probably recognizable to people around these parts
Hail rolled through the springs today and wasn't kind to my soft top.
Doing things
Got the old axle out, suspension, and exhaust pulled and started burning off brackets
Almost feels like cheating plasma cutting rivets off after doing all the front brackets/engine crossmember with a grinder and brute force
Got the old axle out, suspension, and exhaust pulled and started burning off bracketsAlmost feels like cheating plasma cutting rivets off after doing all the front brackets/engine crossmember with a grinder and brute force
Painted a little while I was there
Also cut some off the back
Front brackets hung
Also cut some off the back
Front brackets hung
